National Library of Energy BETA

Sample records for including photovoltaics pv

  1. NREL: Photovoltaics Research - PV News

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PV News The National Renewable Energy Laboratory Photovoltaic (PV) Research Program highlights latest research and news accomplishments from the laboratory on this page. Subscribe to the RSS feed RSS . Learn about RSS. July 22, 2016 NREL's Kurtz, Tegen Honored for Clean Energy Leadership The U.S. Clean Energy Education & Empowerment (C3E) program has honored Sarah Kurtz and Suzanne Tegen of the Energy Department's National Renewable Energy Laboratory (NREL) for their leadership and

  2. Selecting Solar: Insights into Residential Photovoltaic (PV)...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Selecting Solar: Insights into Residential Photovoltaic (PV) Quote Variation Carolyn Davidson and Robert Margolis National Renewable Energy Laboratory Technical Report NREL...

  3. Pioneer Valley Photovoltaics Cooperative aka PV Squared | Open...

    Open Energy Info (EERE)

    Photovoltaics Cooperative aka PV Squared Jump to: navigation, search Name: Pioneer Valley Photovoltaics Cooperative (aka PV Squared) Place: New Britain, Connecticut Zip: 6051...

  4. Arima Photovoltaic And Optical Corp Arima PV | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaic And Optical Corp Arima PV Jump to: navigation, search Name: Arima Photovoltaic And Optical Corp (Arima PV) Place: Taipei, Taiwan Product: Once a maker of computers,...

  5. Interband cascade (IC) photovoltaic (PV) architecture for PV devices

    SciTech Connect (OSTI)

    Yang, Rui Q.; Tian, Zhaobing; Mishima, Tetsuya D.; Santos, Michael B.; Johnson, Matthew B.; Klem, John F.

    2015-10-20

    A photovoltaic (PV) device, comprising a PV interband cascade (IC) stage, wherein the IC PV stage comprises an absorption region with a band gap, the absorption region configured to absorb photons, an intraband transport region configured to act as a hole barrier, and an interband tunneling region configured to act as an electron barrier. An IC PV architecture for a photovoltaic device, the IC PV architecture comprising an absorption region, an intraband transport region coupled to the absorption region, and an interband tunneling region coupled to the intraband transport region and to the adjacent absorption region, wherein the absorption region, the intraband transport region, and the interband tunneling region are positioned such that electrons will flow from the absorption region to the intraband transport region to the interband tunneling region.

  6. Sandia Energy - Photovoltaic (PV) Regional Test Center (RTC)...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Photovoltaic (PV) Regional Test Center (RTC) Website Goes Live Home Renewable Energy Energy Partnership News SunShot News & Events Photovoltaic Solar National Solar Thermal Test...

  7. Solar Photovoltaic (PV) System Permit Application Checklist

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Permit Application Checklist is intended to be used as a best management practice when establishing local government requirements for residential and commercial solar photovoltaic (PV) system permits. Local governments may modify this checklist to accommodate their local ordinances, code requirements, and permit procedures.

  8. Global Solar Photovoltaic (PV) Installation Market to be Propelled...

    Open Energy Info (EERE)

    Global Solar Photovoltaic (PV) Installation Market to be Propelled by Greater Concerns over Carbon Footprint Home > Groups > Renewable Energy RFPs John55364's picture Submitted by...

  9. The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects...

    Office of Environmental Management (EM)

    The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects Data courtesy of National Renewable Energy...

  10. NREL: Photovoltaics Research - Solar PV Recycling Identified as Untapped

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Business Opportunity Solar PV Recycling Identified as Untapped Business Opportunity June 27, 2016 A new report, End-of-Life Management: Solar Photovoltaic Panels, highlights that recycling or repurposing solar PV panels at the end of their roughly 30-year lifetime can unlock a large stock of raw materials and other valuable components. The report, co-authored by NREL, the International Renewable Energy Agency (IRENA) and the International Energy Agency's Photovoltaic Power Systems Programme

  11. NREL: Photovoltaics Research - NREL Releases High-Penetration PV Handbook

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for Distribution Engineers Releases High-Penetration PV Handbook for Distribution Engineers A new resource sponsored by the Energy Department's SunShot Initiative helps distribution engineers understand the challenges of high-penetration PV integration. January 27, 2016 As solar photovoltaic (PV) systems are increasingly installed throughout the country at distribution-level utility scale, a new challenge is emerging: how to safely and effectively integrate greater amounts of variable solar

  12. Photovoltaic module with removable wind deflector (Patent) |...

    Office of Scientific and Technical Information (OSTI)

    Photovoltaic module with removable wind deflector Title: Photovoltaic module with removable wind deflector A photovoltaic (PV) module assembly including a PV module, a deflector, ...

  13. Photovoltaic Regional Testing Center (PV RTC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... Sandia Will Host PV Bankability Workshop at Solar Power International (SPI) 2013 Computational Modeling & Simulation, Distribution Grid Integration, Energy, Facilities, Grid ...

  14. The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects Data courtesy of National Renewable Energy Lab. Chart

  15. Final Technical Report - Photovoltaics for You (PV4You) Program

    SciTech Connect (OSTI)

    Weissman, J. M.; Sherwood, L.; Pulaski, J.; Cook, C.; Kalland, S.; Haynes, J.

    2005-08-14

    In September 2000, the Interstate Renewable Energy Council (IREC) began its 5-year work on contract # DE-FGO3-00SF22116, the Photovoltaics for You (PV4You) Project. The objective was to develop and distribute information on photovoltaics and to educate key stakeholder groups including state government agencies, local government offices, consumer representative agencies, school officials and students, and Million Solar Roofs Partnerships. In addition, the project was to identify barriers to the deployment of photovoltaics and implement strategies to overcome them. Information dissemination and education was accomplished by publishing newsletters; creating a base of information, guides, and models on the www.irecusa.org and the www.millionsolarroofs.org web sites; convening workshops and seminars; engaging multiple stakeholders; and widening the solar network to include new consumers and decision makers. Two major web sites were maintained throughout the project cycle. The www.irecusa.org web site housed dedicated pages for Connecting to the Grid, Schools Going Solar, Community Outreach, and Certification & Training. The www.millionsolarroofs.org web site was created to serve the MSR Partnerships with news, interviews, key documents, and resource material. Through the course of this grant, the Interstate Renewable Energy Council has been supporting the Department of Energy's solar energy program goals by providing the Department with expertise services for their network of city, state, and community stakeholders. IREC has been the leading force at the state and federal levels regarding net metering and interconnection policy for photovoltaic systems. The principal goal and benefit of the interconnection and net metering work is to lower both barriers and cost for the installation of PV. IREC typically plays a leadership role among small generator stakeholders and has come to be relied upon for its expertise by industry and regulators. IREC also took a leadership

  16. A Best Practice for Developing Availability Guarantee Language in Photovoltaic (PV) O&M Agreements.

    SciTech Connect (OSTI)

    Klise, Geoffrey Taylor; Balfour, John

    2015-11-01

    This document outlines the foundation for developing language that can be utilized in an Equipment Availability Guarantee, typically included in an O&M services agreement between a PV system or plant owner and an O&M services provider, or operator. Many of the current PV O&M service agreement Availability Guarantees are based on contracts used for traditional power generation, which create challenges for owners and operators due to the variable nature of grid-tied photovoltaic generating technologies. This report documents language used in early PV availability guarantees and presents best practices and equations that can be used to more openly communicate how the reliability of the PV system and plant equipment can be expressed in an availability guarantee. This work will improve the bankability of PV systems by providing greater transparency into the equipment reliability state to all parties involved in an O&M services contract.

  17. Photovoltaic (PV) Module Level Remote Safety Disconnect - Energy Innovation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Portal Find More Like This Return to Search Photovoltaic (PV) Module Level Remote Safety Disconnect National Renewable Energy Laboratory Contact NREL About This Technology Figure 1: System configuration of emergency module-level disconnect using module-level &lsquo;Isolation Detection Units&rsquo; (IDU).<br /> Figure 1: System configuration of emergency module-level disconnect using module-level 'Isolation Detection Units' (IDU). Technology Marketing Summary The ability to

  18. Improved test method to verify the power rating of a photovoltaic (PV) project.

    SciTech Connect (OSTI)

    Panchula, A.; Pligavko, A.; King, D.; Marion, B.; Townsend, T.; Mitchell, L.; Dierauf, T.; Kimber, A.; Osterwald, C. R.; Newmiller, Jeff; Emery, K.; Talmud, F.; Whitaker, Chuck; Myers, D.; Forbess, J.; Granata, Jennifer E.; Levitsky, T.

    2010-03-01

    This paper reviews the PVUSA power rating method and presents two additional methods that seek to improve this method in terms of model precision and increased seasonal applicability. It presents the results of an evaluation of each method based upon regression analysis of over 12 MW of operating photovoltaic (PV) systems located in a wide variety of climates. These systems include a variety of PV technologies, mounting configurations, and array sizes to ensure the conclusions are applicable to a wide range of PV designs and technologies. The work presented in this paper will be submitted to ASTM for use in the development of a standard test method for certifying the power rating of PV projects.

  19. Stand-alone photovoltaic (PV) powered electrochromic window

    DOE Patents [OSTI]

    Benson, D.K.; Crandall, R.S.; Deb, S.K.; Stone, J.L.

    1995-01-24

    A variable transmittance double pane window includes an electrochromic material that has been deposited on one pane of the window in conjunction with an array of photovoltaic cells deposited along an edge of the pane to produce the required electric power necessary to vary the effective transmittance of the window. A battery is placed in a parallel fashion to the array of photovoltaic cells to allow the user the ability to manually override the system when a desired transmittance is desired. 11 figures.

  20. Stand-alone photovoltaic (PV) powered electrochromic window

    DOE Patents [OSTI]

    Benson, David K.; Crandall, Richard S.; Deb, Satyendra K.; Stone, Jack L.

    1995-01-01

    A variable transmittance double pane window includes an electrochromic material that has been deposited on one pane of the window in conjunction with an array of photovoltaic cells deposited along an edge of the pane to produce the required electric power necessary to vary the effective transmittance of the window. A battery is placed in a parallel fashion to the array of photovoltaic cells to allow the user the ability to manually override the system when a desired transmittance is desired.

  1. Introduction to Small-Scale Photovoltaic Systems (Including RETScreen...

    Open Energy Info (EERE)

    Photovoltaic Systems (Including RETScreen Case Study) (Webinar) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Introduction to Small-Scale Photovoltaic Systems...

  2. New York City- Property Tax Abatement for Photovoltaic (PV) Equipment Expenditures

    Broader source: Energy.gov [DOE]

    In August 2008 the State of New York enacted legislation allowing a property tax abatement for photovoltaic (PV) system expenditures made on buildings located in cities with a population of 1 mil...

  3. Solar Photovoltaic Economic Development: Building and Growing a Local PV Industry, August 2011 (Book)

    SciTech Connect (OSTI)

    Not Available

    2011-08-01

    The U.S. photovoltaic (PV) industry is forecast to grow, and it represents an opportunity for economic development and job creation in communities throughout the United States. This report helps U.S. cities evaluate economic opportunities in the PV industry. It serves as a guide for local economic development offices in evaluating their community?s competitiveness in the solar PV industry, assessing the viability of solar PV development goals, and developing strategies for recruiting and retaining PV companies to their areas.

  4. NREL's PV Incubator: Where Solar Photovoltaic Records Go to be Broken |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy NREL's PV Incubator: Where Solar Photovoltaic Records Go to be Broken NREL's PV Incubator: Where Solar Photovoltaic Records Go to be Broken June 28, 2011 - 11:44am Addthis NREL Principal Engineer Keith Emery prepares to load three-junction concentrator cells into NREL's
 High-Intensity Pulse Solar Simulator to test for efficiency. | Department of Energy Photo | Courtesy of National Renewable Energy Laboratory | Photo by Dennis Schroeder | Public Domain | NREL

  5. Sandia Energy Photovoltaic Regional Testing Center (PV RTC...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    feed 0 Sandians Win 'Best Paper' Award at Photovoltaic Conference in Japan http:energy.sandia.govsandians-win-best-paper-award-at-photovoltaic-conference-in-j...

  6. High Penetration of Photovoltaic (PV) Systems into the Distribution Grid, Workshop Report, February 24-25, 2009

    SciTech Connect (OSTI)

    Not Available

    2009-06-01

    Outcomes from the EERE Solar Energy Technologies Program workshop on high penetration of photovoltaic (PV) systems into the distribution grid, Feb. 24-25, 2009, Ontario, Calif.

  7. NREL: Photovoltaics Research - NREL Hosts PV Module Reliability...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Reliability Workshop for Industry March 1, 2016 Nearly 200 researchers from more than 100 companies and representing 16 countries attended the 7th annual PV Module Reliability ...

  8. Photovoltaic Installation Data from the Open PV Project: Real-time Status of the Solar Photovoltaic Market in the U.S.

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The Open PV Project is a collaborative effort between government, industry, and the public that is compiling a comprehensive database of photovoltaic (PV) installation data for the United States. Data for the project are voluntarily contributed from a variety of sources including utilities, installers, and the general public. The data collected is actively maintained by the contributors and are always changing to provide an evolving, up-to-date snapshot of the US solar power market. The database allows searching by state or zipcode, size or date ranges, and organization name. The results include the cost of each solar install and an average of cost per power watt in that specific state. The Open PV Visualization Gallery features four interactive data maps that instantly reconfigure to display updated information as soon as an individual or organization uploads new data.

  9. ENERGY-10 PV: Photovoltaics, A New Capability (Preprint)

    SciTech Connect (OSTI)

    Balcomb, J.D.; Hayter, S.J.; Weaver, N.L.

    2001-02-16

    This is one of two companion papers that describe the ENERGY-10 PV design-tool computer simulation program. The other paper is titled ''Hourly Simulation of Grid-Connected PV Systems Using Realistic Building Loads.'' While this paper focuses on the implementation method, the companion paper focuses on the PV aspects of the program. The case study in this paper is a residential building application, whereas the case study in the companion paper is a commercial application with an entirely different building load characteristic. Together, they provide a balanced view.

  10. Photovoltaic Performance and Reliability Database: A Gateway to Experimental Data Monitoring Projects for PV at the Florida Solar Energy Center

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    This site is the gateway to experimental data monitoring projects for photovoltaic (PV) at the Florida Solar Energy Center. The website and the database were designed to facilitate and standardize the processes for archiving, analyzing and accessing data collected from dozens of operational PV systems and test facilities monitored by FSEC's Photovoltaics and Distributed Generation Division. [copied from http://www.fsec.ucf.edu/en/research/photovoltaics/data_monitoring/index.htm

  11. PV QA Task Group #2: Thermal and Mechanical Fatigue Including...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    for Rating System Agenda for the PV Module Reliability Workshop, February 26 - 27 2013, Golden, Colorado Accelerated Stress Testing, Qualification Testing, HAST, Field Experience

  12. Selecting Solar: Insights into Residential Photovoltaic (PV) Quote Variation

    SciTech Connect (OSTI)

    Davidson, Carolyn; Margolis, Robert

    2015-10-01

    Before investing in a system, a prospective PV customer must not only have initial concept 'buy in,' but also be able to evaluate the tradeoffs associated with different system parameters. Prospective customers might need to evaluate disparate costs for each system attribute by comparing multiple bids. The difficulty of making such an evaluation with limited information can create a cognitive barrier to proceeding with the investment. This analysis leverages recently available data from EnergySage, an online solar marketplace, to offer the first data-driven characterization of quote variation faced by prospective PV customers, lending early insight into the decisions customers face once they have initial buy-in.

  13. Selecting Solar. Insights into Residential Photovoltaic (PV) Quote Variation

    SciTech Connect (OSTI)

    Davidson, Carolyn; Margolis, Robert

    2015-10-01

    This analysis leverages available data from EnergySage, an online solar marketplace, to offer the first data-driven characterization of quote variation faced by prospective PV customers, lending early insight into the decisions customers face once they have initial buy-in.

  14. Nationwide Analysis of U.S. Commercial Building Solar Photovoltaic (PV) Breakeven Conditions

    SciTech Connect (OSTI)

    Davidson, Carolyn; Gagnon, Pieter; Denholm, Paul; Margolis, Robert

    2015-10-01

    The commercial sector offers strong potential for solar photovoltaics (PV) owing to abundant available roof space suitable for PV and the opportunity to offset the sector's substantial retail electricity purchases. This report evaluated the breakeven price of PV for 15 different building types and various financing options by calculating electricity savings based on detailed rate structures for most U.S. utility territories (representing approximately two thirds of U.S. commercial customers). We find that at current capital costs, an estimated 1/3 of U.S. commercial customers break even in the cash scenario and approximately 2/3 break even in the loan scenario. Variation in retail rates is a stronger driver of breakeven prices than is variation in building load or solar generation profiles. At the building level, variation in the average breakeven price is largely driven by the ability for a PV system to reduce demand charges.

  15. PV QA Task Group #2: Thermal and Mechanical Fatigue Including Vibration |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy QA Task Group #2: Thermal and Mechanical Fatigue Including Vibration PV QA Task Group #2: Thermal and Mechanical Fatigue Including Vibration Presented at the PV Module Reliability Workshop, February 26 - 27 2013, Golden, Colorado pvmrw13_tmf_taskgroup2.pdf (500.28 KB) More Documents & Publications Linkage to Previous International PV Module QA Task Force Workshops: Proposal for Rating System Agenda for the PV Module Reliability Workshop, February 26 - 27 2013,

  16. Photovoltaic device

    DOE Patents [OSTI]

    Reese, Jason A.; Keenihan, James R.; Gaston, Ryan S.; Kauffmann, Keith L.; Langmaid, Joseph A.; Lopez, Leonardo C.; Maak, Kevin D.; Mills, Michael E.; Ramesh, Narayan; Teli, Samar R.

    2015-06-02

    The present invention is premised upon an improved photovoltaic device ("PV device"), more particularly to an improved photovoltaic device with a multilayered photovoltaic cell assembly and a body portion joined at an interface region and including an intermediate layer, at least one interconnecting structural member, relieving feature, unique component geometry, or any combination thereof.

  17. Photovoltaic device

    SciTech Connect (OSTI)

    Reese, Jason A.; Keenihan, James R.; Gaston, Ryan S.; Kauffmann, Keith L.; Langmaid, Joseph A.; Lopez, Leonardo C.; Maak, Kevin D.; Mills, Michael E.; Ramesh, Narayan; Teli, Samar R.

    2015-09-01

    The present invention is premised upon an improved photovoltaic device ("PV device"), more particularly to an improved photovoltaic device (10) with a multilayered photovoltaic cell assembly (100) and a body portion (200) joined at an interface region (410) and including an intermediate layer (500), at least one interconnecting structural member (1500), relieving feature (2500), unique component geometry, or any combination thereof.

  18. Photovoltaics (PV) as an Eligible Measure in Residential PACE Programs: Benefits and Challenges (Fact Sheet)

    SciTech Connect (OSTI)

    Coughlin, J.

    2010-06-01

    Property Assessed Clean Energy (PACE) financing is one of several new financial models broadening access to clean energy by addressing the barrier of initial capital cost. The majority of the PACE programs in the market today include PV as an eligible measure. PV appeals to homeowners as a way to reduce utility bills, self-generate sustainable power, increase energy independence and demonstrate a commitment to the environment. If substantial state incentives for PV exist, PV projects can be economic under PACE, especially when partnered with good net metering policies. At the same time, PV is expensive relative to other eligible measures with a return on investment horizon that might exceed program targets. This fact sheet reviews the benefits and potential challenges of including PV in PACE programs.

  19. Hybrid photovoltaic/thermal (PV/T) solar systems simulation with Simulink/Matlab

    SciTech Connect (OSTI)

    da Silva, R.M.; Fernandes, J.L.M.

    2010-12-15

    The purpose of this work consists in thermodynamic modeling of hybrid photovoltaic-thermal (PV/T) solar systems, pursuing a modular strategy approach provided by Simulink/Matlab. PV/T solar systems are a recently emerging solar technology that allows for the simultaneous conversion of solar energy into both electricity and heat. This type of technology present some interesting advantages over the conventional ''side-by-side'' thermal and PV solar systems, such as higher combined electrical/thermal energy outputs per unit area, and a more uniform and aesthetical pleasant roof area. Despite the fact that early research on PV/T systems can be traced back to the seventies, only recently it has gained a renewed impetus. In this work, parametric studies and annual transient simulations of PV/T systems are undertaken in Simulink/Matlab. The obtained results show an average annual solar fraction of 67%, and a global overall efficiency of 24% (i.e. 15% thermal and 9% electrical), for a typical four-person single-family residence in Lisbon, with p-Si cells, and a collector area of 6 m{sup 2}. A sensitivity analysis performed on the PV/T collector suggests that the most important variable that should be addressed to improve thermal performance is the photovoltaic (PV) module emittance. Based on those results, some additional improvements are proposed, such as the use of vacuum, or a noble gas at low-pressure, to allow for the removal of PV cells encapsulation without air oxidation and degradation, and thus reducing the PV module emittance. Preliminary results show that this option allows for an 8% increase on optical thermal efficiency, and a substantial reduction of thermal losses, suggesting the possibility of working at higher fluid temperatures. The higher working temperatures negative effect in electrical efficiency was negligible, due to compensation by improved optical properties. The simulation results are compared with experimental data obtained from other authors

  20. Interim performance criteria for photovoltaic energy systems. [Glossary included

    SciTech Connect (OSTI)

    DeBlasio, R.; Forman, S.; Hogan, S.; Nuss, G.; Post, H.; Ross, R.; Schafft, H.

    1980-12-01

    This document is a response to the Photovoltaic Research, Development, and Demonstration Act of 1978 (P.L. 95-590) which required the generation of performance criteria for photovoltaic energy systems. Since the document is evolutionary and will be updated, the term interim is used. More than 50 experts in the photovoltaic field have contributed in the writing and review of the 179 performance criteria listed in this document. The performance criteria address characteristics of present-day photovoltaic systems that are of interest to manufacturers, government agencies, purchasers, and all others interested in various aspects of photovoltaic system performance and safety. The performance criteria apply to the system as a whole and to its possible subsystems: array, power conditioning, monitor and control, storage, cabling, and power distribution. They are further categorized according to the following performance attributes: electrical, thermal, mechanical/structural, safety, durability/reliability, installation/operation/maintenance, and building/site. Each criterion contains a statement of expected performance (nonprescriptive), a method of evaluation, and a commentary with further information or justification. Over 50 references for background information are also given. A glossary with definitions relevant to photovoltaic systems and a section on test methods are presented in the appendices. Twenty test methods are included to measure performance characteristics of the subsystem elements. These test methods and other parts of the document will be expanded or revised as future experience and needs dictate.

  1. Performance Modeling of an Air-Based Photovoltaic/Thermal (PV/T) Collector

    SciTech Connect (OSTI)

    Casey, R. D.; Brandemuehl, M. J.; Merrigan, T.; Burch, J.

    2010-01-01

    This paper studies a collector design that utilizes unglazed photovoltaic/thermal (PV/T) collectors preheating air for glazed air heating modules. The performance modeling of these collectors is examined both individually and in series. For each collector type, a dynamic, finite difference, first-law model has been created using literature correlations for friction. The models were compared to performance data, calibrating the models by scaling of friction terms for best fit. The calibrated models generally agree well with the experimental data; even during sudden changes to ambient conditions. The root mean square error between the unglazed PV/T model and experiment results for the useful thermal energy gain and the outlet air temperature are 7.12 W/m{sup 2} and 1.07 C, respectively. The annual source energy performance of the building-integrated PV/T (BIPV/T) array is then simulated for residential applications in seven climate zones of the United States of America. The performance of the BIPV/T array is characterized by the amount of net electrical energy and useful thermal energy produced. The useful thermal energy is defined as the amount of energy offset by the BIPV/T system for water heating and space conditioning. A BIPV/T system composed 87.5% of PV modules, and 12.5% of glazed air heating modules, offsets the same amount of source energy as a roof-mounted PV system of the same area. This array composition increases the thermal energy gain by 47% over a BIPV/T array composed solely of PV modules.

  2. Photovoltaics Research and Development | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Research and Development Photovoltaics Research and Development PV-Activity areas-final-01.png The Photovoltaics (PV) program supports research and development projects that lower manufacturing costs, increase efficiency and performance, and improve reliability of PV technologies, in order to support the widespread deployment of electricity produced directly from sunlight ("photovoltaics"). The PV portfolio includes research directed toward the SunShot Initiative goals as well as

  3. Sandia Energy - Tutorial on PV System Modeling

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Tutorial on PV System Modeling Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics PV Modeling & Analysis Tutorial on PV System Modeling Tutorial on PV...

  4. Using CAD software to simulate PV energy yield - The case of product integrated photovoltaic operated under indoor solar irradiation

    SciTech Connect (OSTI)

    Reich, N.H.; van Sark, W.G.J.H.M.; Turkenburg, W.C.; Sinke, W.C.

    2010-08-15

    In this paper, we show that photovoltaic (PV) energy yields can be simulated using standard rendering and ray-tracing features of Computer Aided Design (CAD) software. To this end, three-dimensional (3-D) sceneries are ray-traced in CAD. The PV power output is then modeled by translating irradiance intensity data of rendered images back into numerical data. To ensure accurate results, the solar irradiation data used as input is compared to numerical data obtained from rendered images, showing excellent agreement. As expected, also ray-tracing precision in the CAD software proves to be very high. To demonstrate PV energy yield simulations using this innovative concept, solar radiation time course data of a few days was modeled in 3-D to simulate distributions of irradiance incident on flat, single- and double-bend shapes and a PV powered computer mouse located on a window sill. Comparisons of measured to simulated PV output of the mouse show that also in practice, simulation accuracies can be very high. Theoretically, this concept has great potential, as it can be adapted to suit a wide range of solar energy applications, such as sun-tracking and concentrator systems, Building Integrated PV (BIPV) or Product Integrated PV (PIPV). However, graphical user interfaces of 'CAD-PV' software tools are not yet available. (author)

  5. Photovoltaic (PV) Pricing Trends: Historical, Recent, and Near-Term Projections

    SciTech Connect (OSTI)

    Feldman, D.; Barbose, G.; Margolis, R.; Wiser, R.; Darghouth, N.; Goodrich, A.

    2012-11-01

    This report helps to clarify the confusion surrounding different estimates of system pricing by distinguishing between past, current, and near-term projected estimates. It also discusses the different methodologies and factors that impact the estimated price of a PV system, such as system size, location, technology, and reporting methods.These factors, including timing, can have a significant impact on system pricing.

  6. Economic Analysis of a Brackish Water Photovoltaic-Operated (BWRO-PV) Desalination System: Preprint

    SciTech Connect (OSTI)

    Al-Karaghouli, A.; Kazmerski, L. L.

    2010-10-01

    The photovoltaic (PV)-powered reverse-osmosis (RO) desalination system is considered one of the most promising technologies in producing fresh water from both brackish and sea water, especially for small systems located in remote areas. We analyze the economic viability of a small PV-operated RO system with a capacity of 5 m3/day used to desalinate brackish water of 4000 ppm total dissolve solids, which is proposed to be installed in a remote area of the Babylon governorate in the middle of Iraq; this area possesses excellent insolation throughout the year. Our analysis predicts very good economic and environmental benefits of using this system. The lowest cost of fresh water achieved from using this system is US $3.98/ m3, which is very reasonable compared with the water cost reported by small-sized desalination plants installed in rural areas in other parts of the world. Our analysis shows that using this small system will prevent the release annually of 8,170 kg of CO2, 20.2 kg of CO, 2.23 kg of CH, 1.52 kg of particulate matter, 16.41 kg of SO2, and 180 kg of NOx.

  7. Microsystem enabled photovoltaic modules and systems (Patent...

    Office of Scientific and Technical Information (OSTI)

    The absorber layer includes an array of photovoltaic (PV) elements. The fixed optic layer ... the translatable optic layer into one of the PV elements such that it is quasi-collimated. ...

  8. Sandia National Laboratory Photovoltaic Design Resources | Open...

    Open Energy Info (EERE)

    are included, along with additional sources of information and major U.S. PV system suppliers. References Sandia Photovoltaic Research and Development Retrieved from "http:...

  9. NREL: Photovoltaics Research - News Release Archives

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    including renewable electricity generation, renewable energy development, clean energy ... that currently cannot host on-site photovoltaic (PV) systems shared solar ...

  10. Photovoltaic energy program overview: Fiscal year 1994

    SciTech Connect (OSTI)

    1995-03-01

    This is the 1994 overview for the Photovoltaic Energy Program. The topics of this overview include cooperative research projects to improve PV systems and develop pre-commercial prototypes of new PV products, expanding understanding of the fundamental mechanisms governing the formation and performance of PV materials, and helping US industry enhance its leadership position in the PV market.

  11. Building opportunities for photovoltaics in the U.S. Final report [PV BONUS

    SciTech Connect (OSTI)

    Michael Nicklas

    1999-09-08

    The objective of the North Carolina's PV Bonus Team was to develop and demonstrate a commercially viable, building-integrated, photovoltaic system that, in addition to providing electricity, would capture and effectively utilize the thermal energy produced by the photovoltaic array. This project objective was successfully achieved by designing, testing, constructing, and monitoring two roof integrated photovoltaic systems--one on a Applebee's Restaurant in Salisbury, North Carolina and the second on a Central Carolina Bank in Bessemer City, North Carolina. The goal of Innovative Design is to now use these successful demonstrations to facilitate entry of building integrated, pv/thermal systems into the marketplace. The strategy was to develop the two systems that could be utilized in future applications. Both systems were designed and then constructed at the North Carolina Solar Center at North Carolina State University. After extensive testing at the North Carolina Solar Center, the systems were moved to the actual construction sites and implemented. The Applebee's Restaurant system was designed to substitute for the roof assembly of a low sloping, south-facing sunspace roof that typically incorporated clay tile. After monitoring the installed system for one year it was determined that the 1.2 kilowatt (peak) system produces an average peak reduction of 1 kilowatt (rated peak is 1.7 kiloWatts), saves 1,529 kilowatt-hours of electricity, and offsets 11,776 kilowatt-hours of thermal energy savings used to pre-heat water. A DC fan connected directly to eight of the thirty-two amorphous modules moves air through air passages mounted on the backside of the modules and into a closed loop duct system to a heat exchanger. This heat exchanger is, in turn, connected to a pre-heat hot water tank that is used to heat the water for the restaurant. The Central Carolina Bank system was designed to substitute for the roof assembly of the drive-in window area of the bank. The

  12. Sandia Energy - PV Value

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PV Value Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Solar Market Transformation PV Value PV ValueTara Camacho-Lopez2015-06-12T20:36:38+00:0...

  13. The Open PV Project | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    The Open PV Project The Open PV Project The Open PV Project is a collaborative effort between government, industry, and the public that is compiling a comprehensive database of photovoltaic (PV) installation data for the United States. Data for the project is voluntarily contributed from a variety of sources including utilities, installers, and the general public. The data collected is actively maintained by the contributors and are always changing to provide an evolving, up-to-date snapshot of

  14. PV Value | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    PV Value PV Value PV Value is a web-based tool that calculates the energy production value for a residential or commercial photovoltaic (PV) system. The tool is Uniform Standards ...

  15. Photovoltaic module kit including connector assembly for non-penetrating array installation

    DOE Patents [OSTI]

    Botkin, Jonathan; Graves, Simon; Danning, Matt; Culligan, Matthew

    2011-11-22

    A PV module kit for non-penetrating rooftop installation, including a plurality of PV modules and a plurality of connectors. Each of the PV modules includes a PV laminate and a frame forming a mounting region assembled thereto. The connectors include a male connector having a male fastener extending from a head, and a female connector having a female fastener assembled within a head. The heads are entirely formed of plastic. The kit provides a mounted array state including a junction at which the mounting region of at least two of the PV modules are aligned and interconnected by engagement of the male connector with the female connector. The so-formed junction is substantially electrically insulated. The plurality of connectors can further include a spacer connector including a head forming a bore sized to slidably receive the male fastener, with all of the connector heads being identical.

  16. Photovoltaic module kit including connector assembly for non-penetrating array installation

    DOE Patents [OSTI]

    Botkin, Jonathan; Graves, Simon; Danning, Matt; Culligan, Matthew

    2012-10-23

    A PV module kit for non-penetrating rooftop installation, including a plurality of PV modules and a plurality of connectors. Each of the PV modules includes a PV laminate and a frame forming a mounting region assembled thereto. The connectors include a male connector having a male fastener extending from a head, and a female connector having a female fastener assembled within a head. The heads are entirely formed of plastic. The kit provides a mounted array state including a junction at which the mounting region of at least two of the PV modules are aligned and interconnected by engagement of the male connector with the female connector. The so-formed junction is substantially electrically insulated. The plurality of connectors can further include a spacer connector including a head forming a bore sized to slidably receive the male fastener, with all of the connector heads being identical.

  17. Photovoltaic module kit including connector assembly for non-penetrating array installation

    DOE Patents [OSTI]

    Botkin, Jonathan; Graves, Simon; Danning, Matt; Culligan, Matthew

    2013-12-31

    A PV module kit for non-penetrating rooftop installation, including a plurality of PV modules and a plurality of connectors. Each of the PV modules includes a PV laminate and a frame forming a mounting region assembled thereto. The connectors include a male connector having a male fastener extending from a head, and a female connector having a female fastener assempbled within a head. The heads are entirely formed of plastic. The kit provides a mounted array state including a junction at which the mounting regions of at least two of the PV modules are aligned and interconnected by engagement of the male connector with the female connector. The so-formed junction is substantially electrically insulated. The plurality of connectors can further include a spacer connector including a head forming a bore sized slidably receive the male fastener, with all of the connector heads being identical.

  18. Photovoltaics | Open Energy Information

    Open Energy Info (EERE)

    to: navigation, search (The following text is derived from NREL's description of photovoltaic technology.)1 Photovoltaic Panels Solar cells, also called photovoltaic (PV)...

  19. PROJECT PROFILE: National Center for Photovoltaics (NCPV) Community Engagement

    Office of Energy Efficiency and Renewable Energy (EERE)

    This project will support National Center for Photovoltaics (NCPV) educational and outreach activities, including Hands-On PV Experience (HOPE) for students.

  20. Concentrating Photovoltaics: Collaborative Opportunities within DOEs CSP and PV Programs; Preprint

    SciTech Connect (OSTI)

    Mehos, M.; Lewandowski, A.; Symko-Davies, M.; Kurtz, S.

    2001-10-01

    Presented at the 2001 NCPV Program Review Meeting: DOEs Concentrating Solar Power program is investigating the viability of concentrating PV converters as an alternative to thermal conversion devices.

  1. Solar Photovoltaic Technology Basics | NREL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Solar Photovoltaic Technology Basics Solar cells, also called photovoltaic (PV) cells by scientists, convert sunlight directly into electricity. PV gets its name from the process ...

  2. Benchmarking Non-Hardware Balance of System (Soft) Costs for U.S. Photovoltaic Systems Using a Data-Driven Analysis from PV Installer Survey Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Benchmarking Non-Hardware Balance of System (Soft) Costs for U.S. Photovoltaic Systems Using a Data-Driven Analysis from PV Installer Survey Results November 2012 Benchmarking Non-Hardware Balance of System (Soft) Costs for U.S. Photovoltaic Systems Using a Data-Driven Analysis from PV Installer Survey Results NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Contract No.

  3. Japan's Solar Photovoltaic (PV) Market: An Analysis of Residential System Prices (Presentation)

    SciTech Connect (OSTI)

    James, T.

    2014-03-01

    This presentation summarizes market and policy factors influencing residential solar photovoltaic system prices in Japan, and compares these factors to related developments in the United States.

  4. Residential, Commercial, and Utility-Scale Photovoltaic (PV) System Prices in the United States: Current Drivers and Cost-Reduction Opportunities

    SciTech Connect (OSTI)

    Goodrich, A.; James, T.; Woodhouse, M.

    2012-02-01

    The price of photovoltaic (PV) systems in the United States (i.e., the cost to the system owner) has dropped precipitously in recent years, led by substantial reductions in global PV module prices. However, system cost reductions are not necessarily realized or realized in a timely manner by many customers. Many reasons exist for the apparent disconnects between installation costs, component prices, and system prices; most notable is the impact of fair market value considerations on system prices. To guide policy and research and development strategy decisions, it is necessary to develop a granular perspective on the factors that underlie PV system prices and to eliminate subjective pricing parameters. This report's analysis of the overnight capital costs (cash purchase) paid for PV systems attempts to establish an objective methodology that most closely approximates the book value of PV system assets.

  5. China Solar Photovoltaic Group CNPV aka Dongying Photovoltaic...

    Open Energy Info (EERE)

    Group CNPV aka Dongying Photovoltaic Power Co Ltd or China Solar PV Jump to: navigation, search Name: China Solar Photovoltaic Group (CNPV, aka Dongying Photovoltaic Power Co Ltd...

  6. Benchmarking Non-Hardware Balance of System (Soft) Costs for U.S. Photovoltaic Systems Using a Data-Driven Analysis from PV Installer Survey Results

    SciTech Connect (OSTI)

    Ardani, K.; Barbose, G.; Margolis, R.; Wiser, R.; Feldman, D.; Ong, S.

    2012-11-01

    This report presents results from the first U.S. Department of Energy (DOE) sponsored, bottom-up data-collection and analysis of non-hardware balance-of-system costs--often referred to as 'business process' or 'soft' costs--for residential and commercial photovoltaic (PV) systems.

  7. Sandia Energy - PV Modeling & Analysis

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PV Modeling & Analysis Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics PV Modeling & Analysis PV Modeling & AnalysisTara Camacho-Lopez2015-05-11T20:03...

  8. Efficient Power Converters for PV Arrays : Scalable Submodule Power Conversion for Utility-Scale Photovoltaics

    SciTech Connect (OSTI)

    2012-02-23

    Solar ADEPT Project: SolarBridge is developing a new power conversion technique to improve the energy output of PV power plants. This new technique is specifically aimed at large plants where many solar panels are connected together. SolarBridge is correcting for the inefficiencies that occur when two solar panels that encounter different amounts of sun are connected together. In most conventional PV system, the weakest panel limits the energy production of the entire system. That’s because all of the energy collected by the PV system feeds into a single collection point where a central inverter then converts it into useable energy for the grid. SolarBridge has found a more efficient and cost-effective way to convert solar energy, correcting these power differences before they reach the grid.

  9. Energy 101: Solar PV

    SciTech Connect (OSTI)

    2011-01-01

    Solar photovoltaic (PV) systems can generate clean, cost-effective power anywhere the sun shines. This video shows how a PV panel converts the energy of the sun into renewable electricity to power homes and businesses.

  10. Energy 101: Solar PV

    Broader source: Energy.gov [DOE]

    Solar photovoltaic (PV) systems can generate clean, cost-effective power anywhere the sun shines. This video shows how a PV panel converts the energy of the sun into renewable electricity to power...

  11. Sandia Energy - PV Publications

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Publications Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics PV Publications PV PublicationsTara Camacho-Lopez2016-01-05T23:50:37+00:00 Recent...

  12. Energy 101: Solar PV

    ScienceCinema (OSTI)

    None

    2013-05-29

    Solar photovoltaic (PV) systems can generate clean, cost-effective power anywhere the sun shines. This video shows how a PV panel converts the energy of the sun into renewable electricity to power homes and businesses.

  13. Ballasted photovoltaic module and module arrays

    DOE Patents [OSTI]

    Botkin, Jonathan; Graves, Simon; Danning, Matt

    2011-11-29

    A photovoltaic (PV) module assembly including a PV module and a ballast tray. The PV module includes a PV device and a frame. A PV laminate is assembled to the frame, and the frame includes an arm. The ballast tray is adapted for containing ballast and is removably associated with the PV module in a ballasting state where the tray is vertically under the PV laminate and vertically over the arm to impede overt displacement of the PV module. The PV module assembly can be installed to a flat commercial rooftop, with the PV module and the ballast tray both resting upon the rooftop. In some embodiments, the ballasting state includes corresponding surfaces of the arm and the tray being spaced from one another under normal (low or no wind) conditions, such that the frame is not continuously subjected to a weight of the tray.

  14. U.S. Residential Photovoltaic (PV) System Prices, Q4 2013 Benchmarks: Cash Purchase, Fair Market Value, and Prepaid Lease Transaction Prices

    SciTech Connect (OSTI)

    Davidson, C.; James, T. L.; Margolis, R.; Fu, R.; Feldman, D.

    2014-10-01

    The price of photovoltaic (PV) systems in the United States (i.e., the cost to the system owner) has dropped precipitously in recent years, led by substantial reductions in global PV module prices. This report provides a Q4 2013 update for residential PV systems, based on an objective methodology that closely approximates the book value of a PV system. Several cases are benchmarked to represent common variation in business models, labor rates, and module choice. We estimate a weighted-average cash purchase price of $3.29/W for modeled standard-efficiency, polycrystalline-silicon residential PV systems installed in the United States. This is a 46% decline from the 2013-dollar-adjusted price reported in the Q4 2010 benchmark report. In addition, this report frames the cash purchase price in the context of key price metrics relevant to the continually evolving landscape of third-party-owned PV systems by benchmarking the minimum sustainable lease price and the fair market value of residential PV systems.

  15. Photovoltaic Device Including A Boron Doping Profile In An I-Type Layer

    DOE Patents [OSTI]

    Yang, Liyou

    1993-10-26

    A photovoltaic cell for use in a single junction or multijunction photovoltaic device, which includes a p-type layer of a semiconductor compound including silicon, an i-type layer of an amorphous semiconductor compound including silicon, and an n-type layer of a semiconductor compound including silicon formed on the i-type layer. The i-type layer including an undoped first sublayer formed on the p-type layer, and a boron-doped second sublayer formed on the first sublayer.

  16. Photovoltaics

    SciTech Connect (OSTI)

    Ebisch, R.

    1981-07-01

    Applications of photovoltaics to non-residential buildings are discussed. Most of the projects underway represent a joint effort by DOE and fifteen manufacturing companies now offering or developing photovoltaics. The systems are either flat-plate arrays, in which the sunlight is received directly on the photocells, or concentrating systems, in which the sunlight is focused on the photocells by mirrors or lenses. The DOE price goal for 1986 is to have photovoltaic systems capable of supplying shopping centers, apartment complexes, and industries with modules costing 70 cents/W and systems costing $1.60 to $2.60/W with the price of power to the user at 7 cents to 11 cents/kWh. New technologies discussed include the use of silicon with no crystal structure and the use of ribbons of silicon. (MJF)

  17. NREL: Photovoltaics Research - Events

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    success. The following events and meetings are of interest to partners of NREL Photovoltaics (PV) Research and the National Center for Photovoltaics (NCPV). Printable Version...

  18. Method of manufacturing a large-area segmented photovoltaic module

    DOE Patents [OSTI]

    Lenox, Carl

    2013-11-05

    One embodiment of the invention relates to a segmented photovoltaic (PV) module which is manufactured from laminate segments. The segmented PV module includes rectangular-shaped laminate segments formed from rectangular-shaped PV laminates and further includes non-rectangular-shaped laminate segments formed from rectangular-shaped and approximately-triangular-shaped PV laminates. The laminate segments are mechanically joined and electrically interconnected to form the segmented module. Another embodiment relates to a method of manufacturing a large-area segmented photovoltaic module from laminate segments of various shapes. Other embodiments relate to processes for providing a photovoltaic array for installation at a site. Other embodiments and features are also disclosed.

  19. Sandia Energy - Evaluating Rooftop Strength for PV

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Evaluating Rooftop Strength for PV Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Evaluating Rooftop Strength for PV Evaluating Rooftop Strength for...

  20. PV_LIB Toolbox v. 1.3

    SciTech Connect (OSTI)

    2015-12-09

    PV_LIB comprises a library of Matlab? code for modeling photovoltaic (PV) systems. Included are functions to compute solar position and to estimate irradiance in the PV system’s plane of array, cell temperature, PV module electrical output, and conversion from DC to AC power. Also included are functions that aid in determining parameters for module performance models from module characterization testing. PV_LIB is open source code primarily intended for research and academic purposes. All algorithms are documented in openly available literature with the appropriate references included in comments within the code.

  1. PV_LIB Toolbox v. 1.3

    Energy Science and Technology Software Center (OSTI)

    2015-12-09

    PV_LIB comprises a library of Matlab? code for modeling photovoltaic (PV) systems. Included are functions to compute solar position and to estimate irradiance in the PV system’s plane of array, cell temperature, PV module electrical output, and conversion from DC to AC power. Also included are functions that aid in determining parameters for module performance models from module characterization testing. PV_LIB is open source code primarily intended for research and academic purposes. All algorithms aremore » documented in openly available literature with the appropriate references included in comments within the code.« less

  2. PSCAD Modules Representing PV Generator

    SciTech Connect (OSTI)

    Muljadi, E.; Singh, M.; Gevorgian, V.

    2013-08-01

    Photovoltaic power plants (PVPs) have been growing in size, and the installation time is very short. With the cost of photovoltaic (PV) panels dropping in recent years, it can be predicted that in the next 10 years the contribution of PVPs to the total number of renewable energy power plants will grow significantly. In this project, the National Renewable Energy Laboratory (NREL) developed a dynamic modeling of the modules to be used as building blocks to develop simulation models of single PV arrays, expanded to include Maximum Power Point Tracker (MPPT), expanded to include PV inverter, or expanded to cover an entire PVP. The focus of the investigation and complexity of the simulation determines the components that must be included in the simulation. The development of the PV inverter was covered in detail, including the control diagrams. Both the current-regulated voltage source inverter and the current-regulated current source inverter were developed in PSCAD. Various operations of the PV inverters were simulated under normal and abnormal conditions. Symmetrical and unsymmetrical faults were simulated, presented, and discussed. Both the three-phase analysis and the symmetrical component analysis were included to clarify the understanding of unsymmetrical faults. The dynamic model validation was based on the testing data provided by SCE. Testing was conducted at SCE with the focus on the grid interface behavior of the PV inverter under different faults and disturbances. The dynamic model validation covers both the symmetrical and unsymmetrical faults.

  3. NREL: Photovoltaics Research - Engineering

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and Reliability team serves to improve PV technologies. Printable Version Photovoltaics Research Home Silicon Polycrystalline Thin Films Multijunctions New Materials,...

  4. Reference module selection criteria for accurate testing of photovoltaic (PV) panels

    SciTech Connect (OSTI)

    Roy, J.N.; Gariki, Govardhan Rao; Nagalakhsmi, V.

    2010-01-15

    It is shown that for accurate testing of PV panels the correct selection of reference modules is important. A detailed description of the test methodology is given. Three different types of reference modules, having different I{sub SC} (short circuit current) and power (in Wp) have been used for this study. These reference modules have been calibrated from NREL. It has been found that for accurate testing, both I{sub SC} and power of the reference module must be either similar or exceed to that of modules under test. In case corresponding values of the test modules are less than a particular limit, the measurements may not be accurate. The experimental results obtained have been modeled by using simple equivalent circuit model and associated I-V equations. (author)

  5. Basic photovoltaic principles and methods

    SciTech Connect (OSTI)

    Hersch, P.; Zweibel, K.

    1982-02-01

    This book presents a nonmathematical explanation of the theory and design of photovoltaic (PV) solar cells and systems. The basic elements of PV are introduced: the photovoltaic effect, physical aspects of solar cell efficiency, the typical single-crystal silicon solar cell, advances in single-crystal silicon solar cells. This is followed by the designs of systems constructed from individual cells, including possible constructions for putting cells together and the equipment needed for a practical producer of electrical energy. The future of PV is then discussed. (LEW)

  6. Photovoltaic module with removable wind deflector (Patent) |...

    Office of Scientific and Technical Information (OSTI)

    Patent: Photovoltaic module with removable wind deflector Citation Details In-Document Search Title: Photovoltaic module with removable wind deflector A photovoltaic (PV) module ...

  7. Solar Photovoltaic Technology Basics | Department of Energy

    Energy Savers [EERE]

    Solar Solar Photovoltaic Technology Basics Solar Photovoltaic Technology Basics August ... Photovoltaic (PV) materials and devices convert sunlight into electrical energy. A single ...

  8. Design and Optimization of Photovoltaics Recycling Infrastructure

    SciTech Connect (OSTI)

    Choi, J.K.; Fthenakis, V.

    2010-10-01

    With the growing production and installation of photovoltaics (PV) around the world constrained by the limited availability of resources, end-of-life management of PV is becoming very important. A few major PV manufacturers currently are operating several PV recycling technologies at the process level. The management of the total recycling infrastructure, including reverse-logistics planning, is being started in Europe. In this paper, we overview the current status of photovoltaics recycling planning and discuss our mathematic modeling of the economic feasibility and the environmental viability of several PV recycling infrastructure scenarios in Germany; our findings suggest the optimum locations of the anticipated PV take-back centers. Short-term 5-10 year planning for PV manufacturing scraps is the focus of this article. Although we discuss the German situation, we expect the generic model will be applicable to any region, such as the whole of Europe and the United States.

  9. Photovoltaics: The next generation

    SciTech Connect (OSTI)

    Wilson, A.

    1986-08-01

    The development of photovoltaics in the United States, with a few notable exceptions, has been carried out by the oil industry. Companies such as Arco, Exxon, Mobil and Sohio have played a tremendously important role in bringing photovoltaic technology to its current state of development. Many of these companies are continuing very active programs in pv, including the investigation of new and potentially far-reaching technologies.

  10. Concentrator Photovoltaic System Basics | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Concentrator Photovoltaic System Basics August 20, 2013 - 4:12pm Addthis Concentrator photovoltaic (PV) systems use less solar cell material than other PV systems. PV cells are the ...

  11. Microsoft Word - 2016 PV Systems Symposium - Save the Date v6.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sandia/EPRI PV Symposium - Save the Date! Save the Date and Call for Abstracts Sandia-EPRI 2016 PV Systems Symposium May 9-11 th at the Biltmore Hotel in Santa Clara, CA Sandia National Laboratories (SNL) and the Electric Power Research Institute (EPRI) are delighted to host this symposium on the technical challenges and opportunities related to solar photovoltaic (PV) systems and technologies. Core areas of focus will include PV performance modeling, distribution hosting capacity and screening

  12. Sandia Energy - PV Systems Reliability

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Systems Reliability Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics PV Systems Reliability PV Systems ReliabilityCoryne Tasca2015-05-08T03:40:54+00:00...

  13. Sandia Energy - PV Program Disclaimer

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PV Program Disclaimersspope2015-03-23T21:15:29+00:00 PV Program Disclaimer The Photovoltaic Projects at Sandia National Laboratories support the development and deployment of...

  14. Photovoltaic performance and reliability workshop

    SciTech Connect (OSTI)

    Mrig, L.

    1993-12-01

    This workshop was the sixth in a series of workshops sponsored by NREL/DOE under the general subject of photovoltaic testing and reliability during the period 1986--1993. PV performance and PV reliability are at least as important as PV cost, if not more. In the US, PV manufacturers, DOE laboratories, electric utilities, and others are engaged in the photovoltaic reliability research and testing. This group of researchers and others interested in the field were brought together to exchange the technical knowledge and field experience as related to current information in this evolving field of PV reliability. The papers presented here reflect this effort since the last workshop held in September, 1992. The topics covered include: cell and module characterization, module and system testing, durability and reliability, system field experience, and standards and codes.

  15. Photovoltaics

    SciTech Connect (OSTI)

    Solar Energy Technologies Program

    2010-09-28

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  16. Photovoltaics

    SciTech Connect (OSTI)

    Not Available

    2008-09-01

    Summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  17. Integrated Photovoltaics | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaics Jump to: navigation, search Name: Integrated Photovoltaics Place: Sunnyvale, California Product: California-based stealth mode PV startup. Coordinates: 32.780338,...

  18. Solar For Schools: A Case Study in Identifying and Implementing Solar Photovoltaic (PV) Projects in Three California School Districts: Preprint

    SciTech Connect (OSTI)

    Kandt, A.

    2011-04-01

    The Department of Energy's (DOE) Solar America Showcase program seeks to accelerate demand for solar technologies among key end use market sectors. As part of this activity the DOE provides Technical Assistance through its national laboratories to large-scale, high-visibility solar installation projects. The Solar Schools Assessment and Implementation Project (SSAIP) in the San Francisco Bay area was selected for a 2009 DOE Solar American Showcase award. SSAIP was formed through the efforts of the nonprofit Sequoia Foundation and includes three school districts: Berkeley, West Contra Costa, and Oakland Unified School Districts. This paper summarizes the technical assistance efforts that resulted from this technical assistance support. It serves as a case study and reference document detailing the steps and processes that could be used to successfully identify, fund, and implement solar PV projects in school districts across the country.

  19. Composites of Upgraded Metallurgical Grade (UMG) Si with Photovoltaic (PV) Grade Si

    SciTech Connect (OSTI)

    Hovel, Harold; Prettyman, Kevin; Krause, Rainer; Dipankar, Roy

    2015-03-27

    At the beginning of this project 125 wafers of UMG material blended with non-UMG were obtained in the various blends; 50/50,70/30,80/20. 90/10 and 100% UMG. Solar grade , non-UMG material was used for comparison. Many techniques for starting substrate evaluation were used including lifetime, resitivity, SEM, IPCMS. Some degree of gettering was implemented by lengthening the time of phosphorous diffusion. The UMG/solar blends resulted in 14.5% -15% efficiencies, and even 100% UMG showed 14.5% values, not less than standard cells manufactured at the time and an encouraging result for the prospects of using UMG material due to the lower $/watt. A later decline in the cost of Si and an emphasis on reaching higher efficiencies in general led to a vanishing interest in the use of UMG.

  20. US photovoltaic patents: 1991--1993

    SciTech Connect (OSTI)

    Pohle, L

    1995-03-01

    This document contains US patents on terrestrial photovoltaic (PV) power applications, including systems, components, and materials as well as manufacturing and support functions. The patent entries in this document were issued from 1991 to 1993. The entries were located by searching USPA, the database of the US Patent Office. The final search retrieved all patents under the class ``Batteries, Thermoelectric and Photoelectric`` and the subclasses ``Photoelectric,`` ``Testing,`` and ``Applications.`` The search also located patents that contained the words ``photovoltaic(s)`` or ``solar cell(s)`` and their derivatives. After the initial list was compiled, most of the patents on the following subjects were excluded: space photovoltaic technology, use of the photovoltaic effect for detectors, and subjects only peripherally concerned with photovoltaic. Some patents on these three subjects were included when ft appeared that those inventions might be of use in terrestrial PV power technologies.

  1. CNEEC - Photovoltaics Tutorial by Prof. Clemens

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Photovoltaics

  2. Stabilized PV system

    DOE Patents [OSTI]

    Dinwoodie, Thomas L.

    2002-12-17

    A stabilized PV system comprises an array of photovoltaic (PV) assemblies mounted to a support surface. Each PV assembly comprises a PV module and a support assembly securing the PV module to a position overlying the support surface. The array of modules is circumscribed by a continuous, belt-like perimeter assembly. Cross strapping, extending above, below or through the array, or some combination of above, below and through the array, secures a first position along the perimeter assembly to at least a second position along the perimeter assembly thereby stabilizing the array against wind uplift forces. The first and second positions may be on opposite sides on the array.

  3. PV Validation and Bankability Workshop | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    PV Validation and Bankability Workshop PV Validation and Bankability Workshop This presentation summarizes the information given by DOE during the Photovoltaic Validation and...

  4. PV Solar Site Assessment (Milwaukee High School)

    Broader source: Energy.gov [DOE]

    The purpose of this assessment is to provide site-specific information on how a solar electric (also referred to as a photovoltaic, or PV) system would perform at your location, including information on estimated physical size, rated output, energy production, costs, financial incentives and mounting options. Site assessors are required to present unbiased information and may not recommend contractors or products.

  5. Status of High Performance PV: Polycrystalline Thin-Film Tandems

    SciTech Connect (OSTI)

    Symko-Davies, M.

    2005-02-01

    The High-Performance Photovoltaic (HiPerf PV) Project was initiated by the U.S. Department of Energy to substantially increase the viability of photovoltaics (PV) for cost-competitive applications so that PV can contribute significantly to our energy supply and our environment. The HiPerf PV Project aims at exploring the ultimate performance limits of existing PV technologies, approximately doubling their sunlight-to-electricity conversion efficiencies during its course. This work includes bringing thin-film cells and modules toward 25% and 20% efficiencies, respectively, and developing multijunction concentrator cells and modules able to convert more than one-third of the sun's energy to electricity (i.e., 33% efficiency). This paper will address recent accomplishments of the NREL in-house research effort involving polycrystalline thin-film tandems, as well as the research efforts under way in the subcontracted area.

  6. DOE to Provide Up to $17.6 Million for Solar Photovoltaic Technology

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Development | Department of Energy Up to $17.6 Million for Solar Photovoltaic Technology Development DOE to Provide Up to $17.6 Million for Solar Photovoltaic Technology Development September 29, 2008 - 3:43pm Addthis WASHINGTON - The U.S. Department of Energy (DOE) today announced up to $17.6 million, subject to annual appropriations, for six early stage photovoltaic (PV) module incubator projects that focus on the initial manufacturing of advanced solar PV technologies. Including the cost

  7. An Analysis of Residential PV System Price Differences between...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Residential photovoltaic (PV) systems were twice as expensive in the United States as in ... Tracking the Sun VIII: The Installed Price of Residential and Non-Residential Photovoltaic ...

  8. NREL: Performance and Reliability R&D - PV Module Reliability...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Performance Reliability R&D Photovoltaics Research Performance Reliability R and D Printable Version PV Module Reliability Workshop NREL hosts an annual Photovoltaic Module...

  9. NREL: Photovoltaics Research - Photovoltaic Manufacturing R&D Project

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Photovoltaic Manufacturing R&D Project Photo of blue solar cells being sorted in a production line. A woman works behind the protective glass in the background. BP Solar's manufacturing capabilities include automatic sorting of solar cells after final testing. NREL's Photovoltaic (PV) Manufacturing Research and Development (R&D) Project was a cost-shared partnership between NREL and a number of private-sector solar companies. The primary project goals were to reduce costs for consumers

  10. General Services Administration Photovoltaics Project in Sacramento, California

    Office of Energy Efficiency and Renewable Energy (EERE)

    Document describes a request for proposal issued for the General Services Administration photovoltaic (PV) project.

  11. 2015 PV Module Reliability Workshop

    Broader source: Energy.gov [DOE]

    The National Renewable Energy Laboratory hosts an annual Photovoltaic (PV) Module Reliability Workshop so that solar technology experts can share information leading to the improvement of PV module reliability. Improvements to module reliability reduce the cost of solar electricity and promotes investor confidence in the technology—both critical goals for moving PV technologies deeper into the electricity marketplace.

  12. Photovoltaics: A Diverse Technology

    Office of Energy Efficiency and Renewable Energy (EERE)

    This video illustrates the diversity of photovoltaic (PV) technology, which is due to innovations in PV materials, reductions in manufacturing costs, and expanding uses of the technology. A brief...

  13. Supported PV module assembly

    DOE Patents [OSTI]

    Mascolo, Gianluigi; Taggart, David F.; Botkin, Jonathan D.; Edgett, Christopher S.

    2013-10-15

    A supported PV assembly may include a PV module comprising a PV panel and PV module supports including module supports having a support surface supporting the module, a module registration member engaging the PV module to properly position the PV module on the module support, and a mounting element. In some embodiments the PV module registration members engage only the external surfaces of the PV modules at the corners. In some embodiments the assembly includes a wind deflector with ballast secured to a least one of the PV module supports and the wind deflector. An array of the assemblies can be secured to one another at their corners to prevent horizontal separation of the adjacent corners while permitting the PV modules to flex relative to one another so to permit the array of PV modules to follow a contour of the support surface.

  14. Low Cost High Concentration PV Systems for Utility Power Generation Amonix,

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Inc. | Department of Energy Amonix, Inc. Low Cost High Concentration PV Systems for Utility Power Generation Amonix, Inc. A series of brief fact sheet on various topics including:Low Cost High Concentration PV Systems for Utility Power Generation,High Efficiency Concentrating Photovoltaic Power System,Reaching Grid Parity Using BP Solar Crystalline Silicon Technology, Fully Integrated Building Science Solutions for Residential and Commercial Photovoltaic Energy Generation,A Value Chain

  15. NREL: Photovoltaics Research - News Release Archives

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Department's National Renewable Energy Laboratory ... Photovoltaic (PV) Pricing Trends: Historical, Recent, and Near-Term ... (PV) solar energy systems, according to a ...

  16. Photovoltaic module and module arrays

    DOE Patents [OSTI]

    Botkin, Jonathan; Graves, Simon; Lenox, Carl J. S.; Culligan, Matthew; Danning, Matt

    2012-07-17

    A photovoltaic (PV) module including a PV device and a frame. The PV device has a PV laminate defining a perimeter and a major plane. The frame is assembled to and encases the laminate perimeter, and includes leading, trailing, and side frame members, and an arm that forms a support face opposite the laminate. The support face is adapted for placement against a horizontal installation surface, to support and orient the laminate in a non-parallel or tilted arrangement. Upon final assembly, the laminate and the frame combine to define a unitary structure. The frame can orient the laminate at an angle in the range of 3.degree.-7.degree. from horizontal, and can be entirely formed of a polymeric material. Optionally, the arm incorporates integral feature(s) that facilitate interconnection with corresponding features of a second, identically formed PV module.

  17. Photovoltaic module and module arrays

    DOE Patents [OSTI]

    Botkin, Jonathan; Graves, Simon; Lenox, Carl J. S.; Culligan, Matthew; Danning, Matt

    2013-08-27

    A photovoltaic (PV) module including a PV device and a frame, The PV device has a PV laminate defining a perimeter and a major plane. The frame is assembled to and encases the laminate perimeter, and includes leading, trailing, and side frame members, and an arm that forms a support face opposite the laminate. The support face is adapted for placement against a horizontal installation surface, to support and orient the laminate in a non-parallel or tilted arrangement. Upon final assembly, the laminate and the frame combine to define a unitary structure. The frame can orient the laminate at an angle in the range of 3.degree.-7.degree. from horizontal, and can be entirely formed of a polymeric material. Optionally, the arm incorporates integral feature(s) that facilitate interconnection with corresponding features of a second, identically formed PV module.

  18. NREL: Photovoltaics Research - Company Partners in Photovoltaic

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Manufacturing R&D Company Partners in Photovoltaic Manufacturing R&D More than 40 private-sector companies partnered with NREL on successful efforts within the PV Manufacturing R&D Project. They included manufacturers of crystalline silicon, thin-film, and concentrator solar technologies. The companies are listed below. Advanced Energy Systems Alpha Solarco ASE Americas AstroPower/GE Energy Boeing Aerospace BP Solar Cronar Crystal Systems Dow Corning Energy Conversion Devices

  19. National Laboratory Photovoltaics Research

    Office of Energy Efficiency and Renewable Energy (EERE)

    DOE supports photovoltaic (PV) research and development and facilities at its national laboratories to accelerate progress toward achieving the SunShot Initiative's technological and economic...

  20. NREL: Photovoltaics Research - News

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    For archived editions of the NCPV Hotline. See also PV events. Printable Version Photovoltaics Research Home Silicon Polycrystalline Thin Films Multijunctions New Materials,...

  1. Progress in photovoltaic system and component improvements

    SciTech Connect (OSTI)

    Thomas, H.P.; Kroposki, B.; McNutt, P.; Witt, C.E.; Bower, W.; Bonn, R.; Hund, T.D.

    1998-07-01

    The Photovoltaic Manufacturing Technology (PVMaT) project is a partnership between the US government (through the US Department of Energy [DOE]) and the PV industry. Part of its purpose is to conduct manufacturing technology research and development to address the issues and opportunities identified by industry to advance photovoltaic (PV) systems and components. The project was initiated in 1990 and has been conducted in several phases to support the evolution of PV industrial manufacturing technology. Early phases of the project stressed PV module manufacturing. Starting with Phase 4A and continuing in Phase 5A, the goals were broadened to include improvement of component efficiency, energy storage and manufacturing and system or component integration to bring together all elements for a PV product. This paper summarizes PV manufacturers` accomplishments in components, system integration, and alternative manufacturing methods. Their approaches have resulted in improved hardware and PV system performance, better system compatibility, and new system capabilities. Results include new products such as Underwriters Laboratories (UL)-listed AC PV modules, modular inverters, and advanced inverter designs that use readily available and standard components. Work planned in Phase 5A1 includes integrated residential and commercial roof-top systems, PV systems with energy storage, and 300-Wac to 4-kWac inverters.

  2. Photovoltaic Cell Performance Basics | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Performance Basics Photovoltaic Cell Performance Basics August 19, 2013 - 4:55pm Addthis Photovoltaic (PV), or solar cells use the energy in sunlight to produce electricity. ...

  3. Solar Leasing for Residential Photovoltaic Systems | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Solar Leasing for Residential Photovoltaic Systems Solar Leasing for Residential Photovoltaic Systems This publication examines the solar lease option for residential PV systems ...

  4. Photovoltaics Value Clearinghouse | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaics Value Clearinghouse Jump to: navigation, search The Photovoltaics Value Clearinghouse was developed by NREL and Clean Power Research.1 The PV Value Clearinghouse is...

  5. Shaanxi Photovoltaic Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Co Ltd Jump to: navigation, search Name: Shaanxi Photovoltaic Co Ltd Place: Shaanxi Province, China Product: Shaanxi-based intergrated PV company. References: Shaanxi Photovoltaic...

  6. British Photovoltaic Association | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaic Association Jump to: navigation, search Name: British Photovoltaic Association Place: Milton Keynes, United Kingdom Zip: MK5 8NG Product: Trade body for the PV...

  7. Southwest Photovoltaic Systems Inc | Open Energy Information

    Open Energy Info (EERE)

    Southwest Photovoltaic Systems Inc Jump to: navigation, search Name: Southwest Photovoltaic Systems Inc Place: Tomball, Texas Zip: 77375 Product: Distributor of small scale PV...

  8. Photovoltaic module with removable wind deflector

    DOE Patents [OSTI]

    Botkin, Jonathan; Graves, Simon; Danning, Matt; Culligan, Matthew

    2014-02-18

    A photovoltaic (PV) module assembly including a PV module, a deflector, and a clip. The PV module includes a PV device and a frame. A PV laminate is assembled to the frame, and the frame includes a support arm forming a seat. The deflector defines a front face and a rear face, with the clip extending from either the trailing frame member or the rear face of the deflector. In a mounted state, the deflector is nested within the seat and is releasably mounted to the trailing frame member via the clip. In some embodiments, the support arm forms a second seat, with the PV module assembly providing a second mounted state in which the deflector is in a differing orientation/slope, nested within the second seat and releasably mounted to the trailing frame member via the clip.

  9. Photovoltaic module with removable wind deflector

    DOE Patents [OSTI]

    Botkin, Jonathan; Graves, Simon; Danning, Matt; Culligan, Matthew

    2013-05-28

    A photovoltaic (PV) module assembly including a PV module, a deflector, and a clip. The PV module includes a PV device and a frame. A PV laminate is assembled to the frame, and the frame includes a support arm forming a seat. The deflector defines a front face and a rear face, with the clip extending from either the trailing frame member or the rear face of the deflector. In a mounted state, the deflector is nested within the seat and is releasably mounted to the trailing frame member via the clip. In some embodiments, the support arm forms a second seat, with the PV module assembly providing a second mounted state in which the deflector is in a differing orientation/slope, nested within the second seat and releasably mounted to the trailing frame member via the clip.

  10. Photovoltaic module with removable wind deflector

    SciTech Connect (OSTI)

    Botkin, Jonathan; Graves, Simon; Danning, Matt; Culligan, Matthew

    2012-08-07

    A photovoltaic (PV) module assembly including a PV module, a deflector, and a clip. The PV module includes a PV device and a frame. A PV laminate is assembled to the frame, and the frame includes a support arm forming a seat. The deflector defines a front face and a rear face, with the clip extending from either the trailing frame member or the rear face of the deflector. In a mounted state, the deflector is nested within the seat and is releasably mounted to the trailing frame member via the clip. In some embodiments, the support arm forms a second seat, with the PV module assembly providing a second mounted state in which the deflector is in a differing orientation/slope, nested within the second seat and releasably mounted to the trailing frame member via the clip.

  11. Raising the Bar for Quality PV Modules | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Raising the Bar for Quality PV Modules Raising the Bar for Quality PV Modules October 30, 2014 - 4:58pm Addthis As photovoltaics (PV) markets expand across the United States the...

  12. Solar PV and Glare Factsheet

    Broader source: Energy.gov [DOE]

    A common misconception about solar photovoltaic (PV) panels is that they inherently cause or create "too much" glare, posing a nuisance to neighbors and a safety risk for pilots. While solar PV systems can produce glare, light absorption - rather than reflection - is central to the function of solar PV panels. This fact sheet describes the basic issues surrounding glare from solar PV panels, the new Federal Aviation Administration guidance, and the implications for local governments.

  13. NREL: Photovoltaics Research - Photovoltaic Energy Ratings Methods

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Validation Photovoltaic Energy Ratings Methods Validation The Photovoltaic (PV) Engineering group at NREL validates energy ratings methods by standards committees to establish an energy rating methodology. We are evaluating techniques to account for the impact on PV performance from variations in the spectral distribution of solar radiation. Two types of methods were evaluated for correcting the short-circuit current of PV modules for variations in the solar spectrum under clear skies: (1)

  14. Photovoltaic Cell Basics | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Cell Basics Photovoltaic Cell Basics August 16, 2013 - 4:53pm Addthis Photovoltaic (PV) cells, or solar cells, take advantage of the photoelectric effect to produce electricity. PV ...

  15. Fire resistant PV shingle assembly

    DOE Patents [OSTI]

    Lenox, Carl J.

    2012-10-02

    A fire resistant PV shingle assembly includes a PV assembly, including PV body, a fire shield and a connection member connecting the fire shield below the PV body, and a support and inter-engagement assembly. The support and inter-engagement assembly is mounted to the PV assembly and comprises a vertical support element, supporting the PV assembly above a support surface, an upper interlock element, positioned towards the upper PV edge, and a lower interlock element, positioned towards the lower PV edge. The upper interlock element of one PV shingle assembly is inter-engageable with the lower interlock element of an adjacent PV shingle assembly. In some embodiments the PV shingle assembly may comprise a ventilation path below the PV body. The PV body may be slidably mounted to the connection member to facilitate removal of the PV body.

  16. Solar photovoltaic reflective trough collection structure

    SciTech Connect (OSTI)

    Anderson, Benjamin J.; Sweatt, William C.; Okandan, Murat; Nielson, Gregory N.

    2015-11-19

    A photovoltaic (PV) solar concentration structure having at least two troughs encapsulated in a rectangular parallelepiped optical plastic structure, with the troughs filled with an optical plastic material, the troughs each having a reflective internal surface and approximately parabolic geometry, and the troughs each including photovoltaic cells situated so that light impinging on the optical plastic material will be concentrated onto the photovoltaic cells. Multiple structures can be connected to provide a solar photovoltaic collection system that provides portable, efficient, low-cost electrical power.

  17. CPS Energy- Solar PV Rebate Program

    Broader source: Energy.gov [DOE]

    CPS Energy, San Antonio's municipal utility, offers rebates to customers who install solar photovoltaic (PV) systems on their homes, schools, or businesses. There are four rebate "tiers" available...

  18. National solar technology roadmap: Concentrator PV

    SciTech Connect (OSTI)

    Friedman, Dan

    2007-06-01

    This roadmap addresses high-concentration (>10x) photovoltaic (PV) systems, incorporating high-efficiency III-V or silicon cells, trackers, and reflective or refractive optics.

  19. Monitoring SERC Technologies - Solar Photovoltaics | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Photovoltaics Monitoring SERC Technologies - Solar Photovoltaics On Oct. 20, 2011, Peter McNutt, an electrical engineer with the Market Transformation Center at NREL, presented a webinar about Solar Photovoltaics and how to properly monitor their installation. View the webinar presentation or read the transcript. More Information Some resources and tools mentioned in the presentation include: Field Inspection Guidelines for PV Systems Procuring Solar Energy: A Guide for Federal Facility Decision

  20. Breakeven Prices for Photovoltaics on Supermarkets in the United States

    SciTech Connect (OSTI)

    Ong, S.; Clark, N.; Denholm, P.; Margolis, R.

    2013-03-01

    The photovoltaic (PV) breakeven price is the PV system price at which the cost of PV-generated electricity equals the cost of electricity purchased from the grid. This point is also called 'grid parity' and can be expressed as dollars per watt ($/W) of installed PV system capacity. Achieving the PV breakeven price depends on many factors, including the solar resource, local electricity prices, customer load profile, PV incentives, and financing. In the United States, where these factors vary substantially across regions, breakeven prices vary substantially across regions as well. In this study, we estimate current and future breakeven prices for PV systems installed on supermarkets in the United States. We also evaluate key drivers of current and future commercial PV breakeven prices by region. The results suggest that breakeven prices for PV systems installed on supermarkets vary significantly across the United States. Non-technical factors -- including electricity rates, rate structures, incentives, and the availability of system financing -- drive break-even prices more than technical factors like solar resource or system orientation. In 2020 (where we assume higher electricity prices and lower PV incentives), under base-case assumptions, we estimate that about 17% of supermarkets will be in utility territories where breakeven conditions exist at a PV system price of $3/W; this increases to 79% at $1.25/W (the DOE SunShot Initiative's commercial PV price target for 2020). These percentages increase to 26% and 91%, respectively, when rate structures favorable to PV are used.

  1. The Capital Intensity of Photovoltaics Manufacturing

    SciTech Connect (OSTI)

    Basore, Paul

    2015-10-19

    Factory capital expenditure (capex) for photovoltaic (PV) module manufacturing strongly influences the per-unit cost of a c-Si module. This provides a significant opportunity to address the U.S. DOE SunShot module price target through capex innovation. Innovation options to reduce the capex of PV manufacturing include incremental and disruptive process innovation with c-Si, platform innovations, and financial approaches. and financial approaches.

  2. Turlock Irrigation District- PV Rebate

    Broader source: Energy.gov [DOE]

    Turlock Irrigation District (TID) offers an incentive program to their customers who install solar photovoltaic (PV) systems. In keeping with the terms of the California Solar Initiative, the inc...

  3. Editorial: Photovoltaic Materials and Devices 2014

    SciTech Connect (OSTI)

    Sopori, Bhushan; Rupnowski, Peter; Shet, Sudhakar; Basnyat, Prakash

    2014-12-22

    An ever increasing demand on energy has fostered many new generation technologies, which include photovoltaics. In recent years, photovoltaic industry has grown very rapidly. The installed capacity of PV for 2013 was about 37 GW and 2014 sales are expected to be around 45 GW. However, there has been excess production for last several years, which is responsible in part for the low prices (about 60 c/W). To lower the PV energy costs further, a major strategy appears to be going to high efficiency solar cells. This approach is favored (over lower cost/lower efficiency) because cell efficiency has a very large influence on the acceptable manufacturing cost of a PV module. Hence, the PV industry is moving toward developing processes and equipment to manufacture solar cells that can yield efficiencies >20%. Therefore, further research is needed within existing technologies to accomplish these objectives. Likewise, research will continue to seek new materials and devices.

  4. SUSTAINABLE AND HOLISTIC INTEGRATION OF ENERGY STORAGE AND SOLAR PV (SHINES)

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Sustainable and Holistic Integration of Energy Storage and Solar PV (SHINES) program develops and demonstrates integrated photovoltaic (PV) and energy storage solutions that are scalable,...

  5. Photovoltaic array mounting apparatus, systems, and methods

    DOE Patents [OSTI]

    West, John Raymond; Atchley, Brian; Hudson, Tyrus Hawkes; Johansen, Emil

    2014-12-02

    An apparatus for mounting a photovoltaic (PV) module on a surface, including a support with an upper surface, a lower surface, tabs, one or more openings, and a clip comprising an arm and a notch, where the apparatus resists wind forces and seismic forces and creates a grounding electrical bond between the PV module, support, and clip. The invention further includes a method for installing PV modules on a surface that includes arranging supports in rows along an X axis and in columns along a Y axis on a surface such that in each row the distance between two neighboring supports does not exceed the length of the longest side of a PV module and in each column the distance between two neighboring supports does not exceed the length of the shortest side of a PV module.

  6. NREL PV AR D 11th review meeting, May 13--15, 1992, Denver Marriott City Center, Denver, Colorado

    SciTech Connect (OSTI)

    Not Available

    1992-01-01

    This is a collection of abstracts from papers presented at the National Renewable Energy Laboratory (NREL) Photovoltaic (PV) research and development review meeting held May 1992. Subject areas covered include solar cell and solar module manufacturing and development, materials, polycrystalline thin films, applications, amorphous silicon, solar cell performance and testing, crystalline silicon and other photovoltaic and safety perspectives. (GHH)

  7. Improved Organic Photovoltaics - Energy Innovation Portal

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Organic Photovoltaics B4 Materials For Organic Semiconductor Applications, Including Molecular Electronics And Organic Photovoltaics University of Colorado Contact CU About This Technology Publications: PDF Document Publication CU2768B (Organic PV) Marketing Summary_1.pdf (146 KB) Technology Marketing Summary Traditionally, photosensitive optoelectronic devices such as solar cells have been constructed of a number of inorganic semiconductors. Purity and crystalline grain size are a large

  8. Breakthrough: micro-electronic photovoltaics

    ScienceCinema (OSTI)

    Okandan, Murat; Gupta, Vipin

    2014-06-23

    Sandia developed tiny glitter-sized photovoltaic (PV) cells that could revolutionize solar energy collection. The crystalline silicon micro-PV cells will be cheaper and have greater efficiencies than current PV collectors. Micro-PV cells require relatively little material to form well-controlled, highly efficient devices. Cell fabrication uses common microelectric and micro-electromechanical systems (MEMS) techniques.

  9. NREL: Photovoltaics Research Home Page

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Photovoltaics Research Photo of Photovoltaic Solar Panels. Photovoltaic (PV) research and development (R&D) at the National Renewable Energy Laboratory (NREL) focuses on (1) boosting solar cell conversion efficiencies, (2) lowering the cost of solar cells, modules, and systems, and (3) improving the reliability of PV components and systems. NREL's PV effort contributes to these goals through high-impact successes in fundamental research, advanced materials and devices, and technology

  10. Photovoltaic Cart Receives Presidential Award

    Broader source: Energy.gov [DOE]

    This photograph features a photovoltaic (PV)-powerd cart that members of the Facilities Energy Management team and Fleet Services organization at Sandia National Laboratories designed. With the...

  11. Process Development for Nanostructured Photovoltaics

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Low-Cost Nanofabrication Method To Develop Nanostructured, Dye-Sensitized Solar Cells Introduction Photovoltaic (PV) manufacturing is an emerging industry that promises a ...

  12. Lessons Learned from the U.S. Photovoltaic Industry and Implications for Development of Distributed Small Wind: Preprint

    SciTech Connect (OSTI)

    Forsyth, T.; Tombari, C.; Nelson, M.

    2006-06-01

    Report examining market development issues in the solar photovoltaic (PV) industry, including Federal policy infrastructure and incentives, state and local policy infrastructure, and business support,as they relate to the small wind industry.

  13. Retrospective Benefit-Cost Evaluation of DOE Investments in Photovolta...

    Broader source: Energy.gov (indexed) [DOE]

    U.S. Department of Energy's (DOE) investment in photovoltaic (PV) technology development. ... Retrospective Benefit-Cost Evaluation of DOE Investment in Photovoltaic Energy Systems ...

  14. Sandia Labs' Photovoltaic Systems Evaluation Lab (PSEL) Marks...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Labs' Photovoltaic Systems Evaluation Lab (PSEL) Marks Accomplishments & Adds Capabilities ... Energy Systems LaboratoryBrayton Lab Photovoltaic Systems Evaluation Laboratory PV ...

  15. Sandia Participation in the 39th IEEE Photovoltaic Specialists...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Participation in the 39th IEEE Photovoltaic Specialists (PVSC) Conference - Sandia Energy ... Energy Systems LaboratoryBrayton Lab Photovoltaic Systems Evaluation Laboratory PV ...

  16. Photovoltaic Electrical Contact and Cell Coating Basics | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Electrical Contact and Cell Coating Basics Photovoltaic Electrical Contact and Cell Coating Basics August 19, 2013 - 4:12pm Addthis The outermost layers of photovoltaic (PV) cell, ...

  17. Dali Yuanchang Photovoltaic Energy Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Yuanchang Photovoltaic Energy Co Ltd Jump to: navigation, search Name: Dali Yuanchang Photovoltaic Energy Co Ltd Place: Dali, Yunnan Province, China Product: China-based PV project...

  18. NREL: Photovoltaics Research - Awards for Photovoltaic Manufacturing...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Awards for Photovoltaic Manufacturing R&D The following research efforts within the PV Manufacturing R&D Project were honored with prestigious industry awards. 1995-AstroPower (now ...

  19. Masdar PV GmbH | Open Energy Information

    Open Energy Info (EERE)

    Masdar PV GmbH Place: Germany Product: Germany-based manufacturer of thin film photovoltaic products and solutions References: Masdar PV GmbH1 This article is a stub. You...

  20. NREL photovoltaic subcontract reports: Abstracts and document control information, 1 August 1991--31 July 1992

    SciTech Connect (OSTI)

    Not Available

    1992-08-01

    This report contains document control information and abstracts for the National Renewable Energy Laboratory (NREL) subcontracted photovoltaic program publications. It also lists source information on additional publications that describe US Department of Energy (DOE) PV research activities. It is not totally exhaustive, so it lists NREL contacts for requesting further information on the DOE and NREL PV programs. This report covers the period from August 1, 1991, through July 31, 1992. The purpose of continuing this type of publication is to help people keep abreast of specific PV interests, while maintaining a balance on the costs to the PV program. The information in this report is organized under PV technology areas: Amorphous silicon research; polycrystalline thin films (including copper indium diselenide, cadmium telluride, and thin-film silicon); crystalline materials and advanced concepts (including silicon, gallium arsenide, and other group III-V materials); and PV manufacturing technology development (which may include manufacturing information for various types of PV materials).

  1. Energy 101: Solar PV | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Solar PV Energy 101: Solar PV Addthis Description Solar photovoltaic (PV) systems can generate clean, cost-effective power anywhere the sun shines. This video shows how a PV panel converts the energy of the sun into renewable electricity to power homes and businesses. Text Version Below is the text version for the Energy 101: Solar PV video. The video opens with "Energy 101: Solar PV." This is followed by a timelapse shot of a city skyline as day turns to night. All right, we all know

  2. Insuring Solar Photovoltaics: Challenges and Possible Solutions; (Revised)

    SciTech Connect (OSTI)

    Speer, B.; Mendelsohn, M.; Cory, K.

    2010-02-01

    Insuring solar photovoltaic (PV) systems poses certain challenges. Insurance premiums, which can represent a significant part of overall costs for PV developers, can affect market competition. The market for certain types of insurance products is limited. Historical loss data is lacking, and test data for the long-term viability of PV products under real-life conditions is limited. Insurers' knowledge about PV systems and the PV industry is uneven even as the industry introduces innovative contractual structures and business models. Interviews conducted for this report with PV project developers, insurance brokers, and underwriters suggest government actions aimed at better testing, data collection, and communication could facilitate the development of a market for PV insurance products. This report identifies actions by governments, national laboratories, and other stakeholders that could accelerate the development of insurance products in support PV systems. Such actions include: increasing understanding of the solar PV industry among insurance professionals; expanding the availability of PV historical loss data; evaluating the expansion of renewable energy business classification; developing module and component testing capabilities and services offered by federal labs; and, advancing industry standards for PV system installers.

  3. Comparison of Pyranometers vs. PV Reference Cells for Evaluation of PV Array Performance

    SciTech Connect (OSTI)

    Dunn, L.; Gostein, M.; Emery, K.

    2012-09-01

    As the photovoltaics (PV) industry has grown, the need for accurately monitoring the solar resource of PV power plants has increased. Historically, the PV industry has relied on thermopile pyranometers for irradiance measurements, and a large body of historical irradiance data taken with pyranometers exists. However, interest in PV reference devices is increasing. In this paper, we discuss why PV reference devices are better suited for PV applications, and estimate the typical uncertainties in irradiance measurements made with both pyranometers and PV reference devices. We assert that the quantity of interest in monitoring a PV power plant is the equivalent irradiance under the IEC 60904-3 reference solar spectrum that would produce the same electrical response in the PV array as the incident solar radiation. For PV-plant monitoring applications, we find the uncertainties in irradiance measurements of this type to be on the order of +/-5% for thermopile pyranometers and +/-2.4% for PV reference devices.

  4. Hot Electron Photovoltaics Using Low Cost Materials and Simple Cell Design

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - Energy Innovation Portal Solar Photovoltaic Solar Photovoltaic Find More Like This Return to Search Hot Electron Photovoltaics Using Low Cost Materials and Simple Cell Design Lawrence Berkeley National Laboratory Contact LBL About This Technology Technology Marketing Summary"Third-generation" PV technologies are being actively pursued in academic research labs. These include nano-optics, multi-junction architectures, multi-exciton, plasmonics, and lower cost tandem cells. The

  5. Esthetically Designed Municipal PV System Maximizes Energy Production and Revenue Return

    Broader source: Energy.gov [DOE]

    In late 2008, the City of Sebastopol, CA installed a unique 42 kW grid-interactive photovoltaic (PV) system to provide electricity for pumps of the Sebastopol municipal water system. The resulting innovative Sun Dragon PV system, located in a public park, includes design elements that provide optimized electrical performance and revenue generation for the energy produced while also presenting an artistic and unique appearance to park visitors.

  6. Integrating High Penetrations of PV into Southern California: Year 2 Project Update; Preprint

    SciTech Connect (OSTI)

    Mather, B.; Neal, R.

    2012-08-01

    Southern California Edison (SCE) is well into a five-year project to install a total of 500 MW of distributed photovoltaic (PV) energy within its utility service territory. Typical installations to date are 1-3 MW peak rooftop PV systems that interconnect to medium-voltage urban distribution circuits or larger (5 MW peak) ground-mounted systems that connect to medium-voltage rural distribution circuits. Some of the PV system interconnections have resulted in distribution circuits that have a significant amount of PV generation compared to customer load, resulting in high-penetration PV integration scenarios. The National Renewable Energy Laboratory (NREL) and SCE have assembled a team of distribution modeling, resource assessment, and PV inverter technology experts in order to investigate a few of the high-penetration PV distribution circuits. Currently, the distribution circuits being studied include an urban circuit with a PV penetration of approximately 46% and a rural circuit with a PV penetration of approximately 60%. In both cases, power flow on the circuit reverses direction, compared to traditional circuit operation, during periods of high PV power production and low circuit loading. Research efforts during year two of the five-year project were focused on modeling the distribution system level impacts of high-penetration PV integrations, the development and installation of distribution circuit data acquisition equipment appropriate for quantifying the impacts of high-penetration PV integrations, and investigating high-penetration PV impact mitigation strategies. This paper outlines these research efforts and discusses the following activities in more detail: the development of a quasi-static time-series test feeder for evaluating high-penetration PV integration modeling tools; the advanced inverter functions being investigated for deployment in the project's field demonstration and a power hardware-in-loop test of a 500-kW PV inverter implementing a

  7. Photovoltaic Research Facilities

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) funds photovoltaic (PV) research and development (R&D) at its national laboratory facilities located throughout the country. To encourage further innovation,...

  8. Photovoltaic Subcontract Program

    SciTech Connect (OSTI)

    Surek, Thomas; Catalano, Anthony

    1993-03-01

    This report summarizes the fiscal year (FY) 1992 progress of the subcontracted photovoltaic (PV) research and development (R D) performed under the Photovoltaic Advanced Research and Development Project at the National Renewable Energy Laboratory (NREL)-formerly the Solar Energy Research Institute (SERI). The mission of the national PV program is to develop PV technology for large-scale generation of economically competitive electric power in the United States. The technical sections of the report cover the main areas of the subcontract program: the Crystalline Materials and Advanced Concepts project, the Polycrystalline Thin Films project, Amorphous Silicon Research project, the Photovoltaic Manufacturing Technology (PVMaT) project, PV Module and System Performance and Engineering project, and the PV Analysis and Applications Development project. Technical summaries of each of the subcontracted programs provide a discussion of approaches, major accomplishments in FY 1992, and future research directions.

  9. NREL: Performance and Reliability R&D - PV Module Reliability...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PV Module Reliability Workshop NREL hosts an annual Photovoltaic Module Reliability Workshop (PVMRW) so that solar technology experts can share information leading to the ...

  10. PROJECT PROFILE: Improving PV performance Estimates in the System...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    This project will improve the forecasting of lifetime PV system performance as well as operations and maintenance costs by incorporating the Photovoltaic Reliability and ...

  11. Siemens PV Technology now Konarka | Open Energy Information

    Open Energy Info (EERE)

    Siemens PV Technology (now Konarka) Place: Germany Product: Formerly the organic photovoltaic research operations of Siemens, which became part of Konarka Technologies on...

  12. NREL Mesa Top PV System | Open Energy Information

    Open Energy Info (EERE)

    PV System Facility National Renewable Energy Laboratory Sector Solar Facility Type Photovoltaic Owner SunEdison Solar Developer SunEdison Solar Energy Purchaser National Renewable...

  13. Photovoltaic battery & charge controller market & applications survey. An evaluation of the photovoltaic system market for 1995

    SciTech Connect (OSTI)

    Hammond, R.L.; Turpin, J.F.; Corey, G.P.

    1996-12-01

    Under the sponsorship of the Department of Energy, Office of Utility Technologies, the Battery Analysis and Evaluation Department and the Photovoltaic System Assistance Center of Sandia National Laboratories (SNL) initiated a U.S. industry-wide PV Energy Storage System Survey. Arizona State University (ASU) was contracted by SNL in June 1995 to conduct the survey. The survey included three separate segments tailored to: (a) PV system integrators, (b) battery manufacturers, and (c) PV charge controller manufacturers. The overall purpose of the survey was to: (a) quantify the market for batteries shipped with (or for) PV systems in 1995, (b) quantify the PV market segments by battery type and application for PV batteries, (c) characterize and quantify the charge controllers used in PV systems, (d) characterize the operating environment for energy storage components in PV systems, and (e) estimate the PV battery market for the year 2000. All three segments of the survey were mailed in January 1996. This report discusses the purpose, methodology, results, and conclusions of the survey.

  14. Photovoltaic self-assembly.

    SciTech Connect (OSTI)

    Lavin, Judith; Kemp, Richard Alan; Stewart, Constantine A.

    2010-10-01

    This late-start LDRD was focused on the application of chemical principles of self-assembly on the ordering and placement of photovoltaic cells in a module. The drive for this chemical-based self-assembly stems from the escalating prices in the 'pick-and-place' technology currently used in the MEMS industries as the size of chips decreases. The chemical self-assembly principles are well-known on a molecular scale in other material science systems but to date had not been applied to the assembly of cells in a photovoltaic array or module. We explored several types of chemical-based self-assembly techniques, including gold-thiol interactions, liquid polymer binding, and hydrophobic-hydrophilic interactions designed to array both Si and GaAs PV chips onto a substrate. Additional research was focused on the modification of PV cells in an effort to gain control over the facial directionality of the cells in a solvent-based environment. Despite being a small footprint research project worked on for only a short time, the technical results and scientific accomplishments were significant and could prove to be enabling technology in the disruptive advancement of the microelectronic photovoltaics industry.

  15. Photovoltaics Fact Sheet

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Verde National Park in Colorado is the home of this PV array, where it provides energy for the visitor center. Photo Courtesy: Department of Energy Photovoltaics The U.S. Department of Energy (DOE)'s Solar Energy Technologies Office works with industry, academia, national laboratories, and other government agencies to advance solar photovoltaics (PV), which is the direct conversion of sunlight into electricity by a semiconductor, in support of the goals of the SunShot Initiative. SunShot

  16. Photovoltaic Degradation Risk: Preprint

    SciTech Connect (OSTI)

    Jordan, D. C.; Kurtz, S. R.

    2012-04-01

    The ability to accurately predict power delivery over the course of time is of vital importance to the growth of the photovoltaic (PV) industry. Important cost drivers include the efficiency with which sunlight is converted into power, how this relationship changes over time, and the uncertainty in this prediction. An accurate quantification of power decline over time, also known as degradation rate, is essential to all stakeholders - utility companies, integrators, investors, and researchers alike. In this paper we use a statistical approach based on historical data to quantify degradation rates, discern trends and quantify risks related to measurement uncertainties, number of measurements and methodologies.

  17. Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    DOE Solar Energy Technologies Program

    2011-10-13

    DOE works with national labs, academia, and industry to support the domestic photovoltaics (PV) industry and research enterprise. SunShot aims to achieve widespread, unsubsidized cost-competitiveness through an applied research and development (R&D) portfolio spanning PV materials, devices, and manufacturing technologies.

  18. Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-10-01

    DOE works with national labs, academia, and industry to support the domestic photovoltaics (PV) industry and research enterprise. SunShot aims to achieve widespread, unsubsidized cost-competitiveness through an applied research and development (R&D) portfolio spanning PV materials, devices, and manufacturing technologies.

  19. Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-11-01

    The U.S. Department of Energy (DOE) works with industry, academia, national laboratories, and other government agencies to advance solar photovoltaics (PV) domestically. The SunShot Initiative aims to achieve widespread, unsubsidized cost-competitiveness through an applied research and development (R&D) portfolio spanning PV materials, devices, and manufacturing technologies.

  20. Photovoltaic Shade Structure at Denver Courthouse

    Office of Energy Efficiency and Renewable Energy (EERE)

    This photograph features the photovoltaic (PV) shade structure on the top floor of the Alfred A. Arraj U.S. Courthouse that is the partial light-transmitting building-integrated PV panels,...

  1. Photovoltaic Cell Conversion Efficiency Basics | Department of...

    Energy Savers [EERE]

    August 20, 2013 - 2:58pm Addthis The conversion efficiency of a photovoltaic (PV) cell, or solar cell, is the percentage of the solar energy shining on a PV device that is ...

  2. GreyStone Power- Photovoltaic Rebate Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    GreyStone Power, an electricity cooperative in Georgia, offers a rebate for solar photovoltaic (PV) systems to members. The one-time rebate is offered for PV installations that are interconnected...

  3. Kauai Island Utility Co-op (KIUC) PV integration study.

    SciTech Connect (OSTI)

    Ellis, Abraham; Mousseau, Tom

    2011-08-01

    This report investigates the effects that increased distributed photovoltaic (PV) generation would have on the Kauai Island Utility Co-op (KIUC) system operating requirements. The study focused on determining reserve requirements needed to mitigate the impact of PV variability on system frequency, and the impact on operating costs. Scenarios of 5-MW, 10-MW, and 15-MW nameplate capacity of PV generation plants distributed across the Kauai Island were considered in this study. The analysis required synthesis of the PV solar resource data and modeling of the KIUC system inertia. Based on the results, some findings and conclusions could be drawn, including that the selection of units identified as marginal resources that are used for load following will change; PV penetration will displace energy generated by existing conventional units, thus reducing overall fuel consumption; PV penetration at any deployment level is not likely to reduce system peak load; and increasing PV penetration has little effect on load-following reserves. The study was performed by EnerNex under contract from Sandia National Laboratories with cooperation from KIUC.

  4. US Photovoltaic Patents, 1988--1990

    SciTech Connect (OSTI)

    Not Available

    1991-12-01

    This document contains US patents on terrestrial photovoltaic (PV) power applications, including systems, components, and materials, as well as manufacturing and support functions. The patent entries in this document were issued from 1988 through 1990. The entries were located by searching USPA, the data base of the US Patent Office. The final search retrieved all patents under the class ``Batteries, Thermoelectric and Photoelectric`` and the subclasses ``Photoelectric,`` ``Testing,`` and ``Applications.`` The search also located patents that contained the words ``photovoltaic(s)`` or ``solar cell(s)`` and their derivatives. A manual search of the patents in the Solar Energy Research Institute (SERI) patent file augmented the data base search. After the initial list was compiled, most of the patents on the following subjects were excluded: space photovoltaic technology, use of the photovoltaic effect for detectors and subjects only peripherally concerned with photovoltaics. Some patents on these three subjects were included when it appeared that those inventions might be of use in terrestrial PV power technologies.

  5. US Photovoltaic Patents, 1988--1990

    SciTech Connect (OSTI)

    Not Available

    1991-12-01

    This document contains US patents on terrestrial photovoltaic (PV) power applications, including systems, components, and materials, as well as manufacturing and support functions. The patent entries in this document were issued from 1988 through 1990. The entries were located by searching USPA, the data base of the US Patent Office. The final search retrieved all patents under the class Batteries, Thermoelectric and Photoelectric'' and the subclasses Photoelectric,'' Testing,'' and Applications.'' The search also located patents that contained the words photovoltaic(s)'' or solar cell(s)'' and their derivatives. A manual search of the patents in the Solar Energy Research Institute (SERI) patent file augmented the data base search. After the initial list was compiled, most of the patents on the following subjects were excluded: space photovoltaic technology, use of the photovoltaic effect for detectors and subjects only peripherally concerned with photovoltaics. Some patents on these three subjects were included when it appeared that those inventions might be of use in terrestrial PV power technologies.

  6. NREL/SCE High-Penetration PV Integration Project: Report on Field Demonstration of Advanced Inverter Functionality in Fontana, CA

    SciTech Connect (OSTI)

    Mather, B.

    2014-08-01

    The National Renewable Energy Laboratory/Southern California Edison High-Penetration PV Integration Project is (1) researching the distribution system level impacts of high-penetration photovoltaic (PV) integration, (2) determining mitigation methods to reduce or eliminate those impacts, and (3) seeking to demonstrate these mitigation methods on actual high-penetration PV distribution circuits. This report describes a field demonstration completed during the fall of 2013 on the Fontana, California, study circuit, which includes a total of 4.5 MW of interconnected utility-scale rooftop PV systems. The demonstration included operating a 2-MW PV system at an off-unity power factor that had been determined during previously completed distribution system modeling and PV impact assessment analyses. Data on the distribution circuit and PV system operations were collected during the 2-week demonstration period. This demonstration reinforces the findings of previous laboratory testing that showed that utility-scale PV inverters are capable of operating at off-unity power factor to mitigate PV impacts; however, because of difficulties setting and retaining PV inverter power factor set points during the field demonstration, it was not possible to demonstrate the effectiveness of off-unity power factor operation to mitigate the voltage impacts of high-penetration PV integration. Lessons learned from this field demonstration are presented to inform future field demonstration efforts.

  7. Lab Breakthrough: Microelectronic Photovoltaics | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Microelectronic Photovoltaics Lab Breakthrough: Microelectronic Photovoltaics June 7, 2012 - 9:31am Addthis Sandia developed tiny glitter-sized photovoltaic (PV) cells that could revolutionize solar energy collection. The crystalline silicon micro-PV cells will be cheaper and have greater efficiencies than current PV collectors. View the entire YouTube Lab Breakthroughs playlist. Michael Hess Michael Hess Former Digital Communications Specialist, Office of Public Affairs What are MEMS? MEMS are

  8. Crystalline Silicon Photovoltaics Research | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Crystalline Silicon Photovoltaics Research Crystalline Silicon Photovoltaics Research DOE supports crystalline silicon photovoltaic (PV) research and development efforts that lead to market-ready technologies. Below are a list of the projects, summary of the benefits, and discussion on the production and manufacturing of this solar technology. Background Crystalline silicon PV cells are the most common solar cells used in commercially available solar panels, representing 87% of world PV cell

  9. User's Manual for Data for Validating Models for PV Module Performance

    SciTech Connect (OSTI)

    Marion, W.; Anderberg, A.; Deline, C.; Glick, S.; Muller, M.; Perrin, G.; Rodriguez, J.; Rummel, S.; Terwilliger, K.; Silverman, T. J.

    2014-04-01

    This user's manual describes performance data measured for flat-plate photovoltaic (PV) modules installed in Cocoa, Florida, Eugene, Oregon, and Golden, Colorado. The data include PV module current-voltage curves and associated meteorological data for approximately one-year periods. These publicly available data are intended to facilitate the validation of existing models for predicting the performance of PV modules, and for the development of new and improved models. For comparing different modeling approaches, using these public data will provide transparency and more meaningful comparisons of the relative benefits.

  10. Bexar County Parking Garage Photovoltaic Panels

    SciTech Connect (OSTI)

    Golda Weir

    2012-01-23

    The main objective of the Bexar County Parking Garage Photovoltaic (PV) Panel project is to install a PV System that will promote the use of renewable energy. This project will also help sustain Bexar County ongoing greenhouse gas emissions reduction and energy efficiency goals. The scope of this project includes the installation of a 100-kW system on the top level of a new 236,285 square feet parking garage. The PV system consists of 420 solar panels that covers 7,200 square feet and is tied into the electric-grid. It provides electricity to the office area located within the garage. The estimated annual electricity production of the PV system is 147,000 kWh per year.

  11. Chapter 1.19: Cadmium Telluride Photovoltaic Thin Film: CdTe

    SciTech Connect (OSTI)

    Gessert, T. A.

    2012-01-01

    The chapter reviews the history, development, and present processes used to fabricate thin-film, CdTe-based photovoltaic (PV) devices. It is intended for readers who are generally familiar with the operation and material aspects of PV devices but desire a deeper understanding of the process sequences used in CdTe PV technology. The discussion identifies why certain processes may have commercial production advantages and how the various process steps can interact with each other to affect device performance and reliability. The chapter concludes with a discussion of considerations of large-area CdTe PV deployment including issues related to material availability and energy-payback time.

  12. Merced Irrigation District- PV Buydown Program

    Broader source: Energy.gov [DOE]

    Merced Irrigation District (MID) offers its residential, commercial and non-profit customers a rebate for installing solar electric photovoltaic (PV) systems on their homes and offices. For 2015,...

  13. City of Lompoc Utilities- PV Rebate Program

    Broader source: Energy.gov [DOE]

    City of Lompoc Utilities provides rebates to its electric customers who purchase and install photovoltaic (PV) systems. The rebate is $1.00 per watt-AC. The incentive amount may not exceed 50% the...

  14. PV Module Reliability Research (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-06-01

    This National Center for Photovoltaics sheet describes the capabilities of its PV module reliability research. The scope and core competencies and capabilities are discussed and recent publications are listed.

  15. Sandia Energy - PV Reliability & Performance Model

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    15-06-01T20:13:00+00:00 This Web Demo model is a simplified "player" version of the Photovoltaic Reliability Performance Model (PV-RPM) currently in development at Sandia National...

  16. Plumas-Sierra REC- PV Rebate Program

    Broader source: Energy.gov [DOE]

    Plumas-Sierra REC offers an incentive for its customers to install photovoltaic (PV) systems on homes and businesses. Rebates are available for qualifying systems between one kilowatt (kW) and 25...

  17. PROJECT PROFILE: Reducing PV Performance Uncertainty by Accurately

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Quantifying the "PV Resource" | Department of Energy Reducing PV Performance Uncertainty by Accurately Quantifying the "PV Resource" PROJECT PROFILE: Reducing PV Performance Uncertainty by Accurately Quantifying the "PV Resource" Funding Opportunity: SuNLaMP SunShot Subprogram: Photovoltaics Location: National Renewable Energy Laboratory, Golden, CO Amount Awarded: $2,500,000 The procedures used today for prediction of the solar resource available to

  18. Low Cost High Concentration PV Systems for Utility Power Generation |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Low Cost High Concentration PV Systems for Utility Power Generation An overview of the Low Cost High Concentration PV Systems for Utility Power Generation project to transition Amonix's concentrating photovoltaic (PV) systems from low-volume to high-volume production. Low Cost High Concentration PV Systems for Utility Power Generation (972.55 KB) More Documents & Publications Solar America Initiative Low Cost High Concentration PV Systems for Utility Power

  19. Photovoltaic System in Philadelphia Center City District

    Broader source: Energy.gov [DOE]

    This photograph features a 3-kilowatt photovoltaic (PV) installation on the roof of a building in the Center City District of Philadelphia, Pennsylvania.

  20. PROJECT PROFILE: Support of International Photovoltaic Module...

    Broader source: Energy.gov (indexed) [DOE]

    This project supports the National Renewable Energy Laboratory's involvement in the Photovoltaic (PV) Module Quality Assurance Task Force (PVQAT) to develop the international test ...

  1. NREL: Photovoltaics Research - Solar Energy Research Facility

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Solar Energy Research Facility Photo of the Solar Energy Research Facility. The exterior stepped clerestory of the Solar Energy Research Facility. Photovoltaics (PV) and basic ...

  2. NREL: Photovoltaics Research - Materials Applications and Performance...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    about the scientists specializing in each area of PV research: National Center for Photovoltaics research staff Materials Applications and Performance research staff Materials...

  3. Sandia Energy - Microsystems Enabled Photovoltaics (MEPV)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    About MEPV Researchers at Sandia National Laboratories are pioneering solar photovoltaic (PV) technologies that are cheaper to produce and easier to install than...

  4. NREL: Photovoltaics Research - NREL and Partners Demonstrate...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Demonstration project shows utility-scale photovoltaic plants that incorporate ... Council of Texas to conduct a demonstration project on two utility-scale PV plants ...

  5. Plug-and-Play Photovoltaics Funding Opportunity

    Office of Energy Efficiency and Renewable Energy (EERE)

    Through the Plug-and-Play Photovoltaics program, DOE will advance the development of a commercial plug-and-play photovoltaic (PV) system, an off-the-shelf product that is fully inclusive with...

  6. Polar Photovoltaics Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Polar Photovoltaics Co Ltd Jump to: navigation, search Name: Polar Photovoltaics Co Ltd Place: Bengbu, Anhui Province, China Zip: 233030 Product: A Chinese a-Si thin film PV cell...

  7. Microsystem enabled photovoltaic modules and systems

    DOE Patents [OSTI]

    Nielson, Gregory N; Sweatt, William C; Okandan, Murat

    2015-05-12

    A microsystem enabled photovoltaic (MEPV) module including: an absorber layer; a fixed optic layer coupled to the absorber layer; a translatable optic layer; a translation stage coupled between the fixed and translatable optic layers; and a motion processor electrically coupled to the translation stage to controls motion of the translatable optic layer relative to the fixed optic layer. The absorber layer includes an array of photovoltaic (PV) elements. The fixed optic layer includes an array of quasi-collimating (QC) micro-optical elements designed and arranged to couple incident radiation from an intermediate image formed by the translatable optic layer into one of the PV elements such that it is quasi-collimated. The translatable optic layer includes an array of focusing micro-optical elements corresponding to the QC micro-optical element array. Each focusing micro-optical element is designed to produce a quasi-telecentric intermediate image from substantially collimated radiation incident within a predetermined field of view.

  8. Results from Undergraduate PV Projects at Seven Historically Black Colleges and Universities

    SciTech Connect (OSTI)

    McConnell, R. D.

    1999-03-03

    In 1995, the NREL/Department of Energy (DOE) National Photovoltaics Program funded seven Historically Black Colleges and Universities (HBCUs) in its HBCU Photovoltaic Research Associates Program for a period of three years. The program's purpose is to advance HBCU undergraduate knowledge of photovoltaics, primarily as a result of research investigations performed, and to encourage students to pursue careers in photovoltaics. This paper presents results from PV projects ranging from fundamental materials research on PV materials to field projects of PV systems.

  9. Project Profile: Evaluating the Causes of Photovoltaics Cost Reduction: Why

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    is PV different? | Department of Energy Soft Costs » Project Profile: Evaluating the Causes of Photovoltaics Cost Reduction: Why is PV different? Project Profile: Evaluating the Causes of Photovoltaics Cost Reduction: Why is PV different? Logo of Massachusetts Institute of Technology. The bar chart below the logo shows the cost reduction in photovoltaics compared to other energy-conversion technologies. PV is performing better than coal, natural gas, nuclear fusion, wind, and solar thermal

  10. Photovoltaics | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Photovoltaics Photovoltaics The SunShot Initiative supports the research and development of photovoltaic (PV) technologies to improve efficiency and reliability and to lower manufacturing costs in order to make solar electricity cost-competitive with other sources of energy by 2020. As of November 2015, four years into the decade-long SunShot Initiative, the solar industry is about 70% of the way to achieving SunShot's cost target of $0.06 per kilowatt-hour for utility-scale PV (based on 2010

  11. Indirect Benefits (Increased Roof Life and HVAC Savings) from a Solar PV System at the San José Convention Center

    Broader source: Energy.gov [DOE]

    The City of San José is considering the installation of a solar photovoltaic (PV) system on the roof of the San José Convention Center. The installation would be on a lower section of the roof covering approximately 21,000 ft2. To assist city staff in making a decision on the PV installation, the Department of Energy Tiger Team has investigated potential indirect benefits of installing a solar PV system on the Convention Center roof. The indirect benefits include potential increase in roof life, as well as potential reduced heating and cooling load in the building due to roof shading from the PV system.

  12. Models used to assess the performance of photovoltaic systems.

    SciTech Connect (OSTI)

    Stein, Joshua S.; Klise, Geoffrey T.

    2009-12-01

    This report documents the various photovoltaic (PV) performance models and software developed and utilized by researchers at Sandia National Laboratories (SNL) in support of the Photovoltaics and Grid Integration Department. In addition to PV performance models, hybrid system and battery storage models are discussed. A hybrid system using other distributed sources and energy storage can help reduce the variability inherent in PV generation, and due to the complexity of combining multiple generation sources and system loads, these models are invaluable for system design and optimization. Energy storage plays an important role in reducing PV intermittency and battery storage models are used to understand the best configurations and technologies to store PV generated electricity. Other researcher's models used by SNL are discussed including some widely known models that incorporate algorithms developed at SNL. There are other models included in the discussion that are not used by or were not adopted from SNL research but may provide some benefit to researchers working on PV array performance, hybrid system models and energy storage. The paper is organized into three sections to describe the different software models as applied to photovoltaic performance, hybrid systems, and battery storage. For each model, there is a description which includes where to find the model, whether it is currently maintained and any references that may be available. Modeling improvements underway at SNL include quantifying the uncertainty of individual system components, the overall uncertainty in modeled vs. measured results and modeling large PV systems. SNL is also conducting research into the overall reliability of PV systems.

  13. PHOTOVOLTAICS AND THE ENVIRONMENT 1998. REPORT ON THE WORKSHOP PHOTOVOLTAICS AND THE ENVIRONMENT 1999

    SciTech Connect (OSTI)

    FTHENAKIS,V.; ZWEIBEL,K.; MOSKOWITZ,P.

    1999-02-01

    The objective of the workshop ``Photovoltaics and the Environment'' was to bring together PV manufacturers and industry analysts to define EH and S issues related to the large-scale commercialization of PV technologies.

  14. Transforming PV Installations toward Dispatchable, Schedulable Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Solutions | Department of Energy Transforming PV Installations toward Dispatchable, Schedulable Energy Solutions Transforming PV Installations toward Dispatchable, Schedulable Energy Solutions Advanced Energy logo.png -- This project is inactive -- Advanced Energy (AE) will address three important needs in the further deployment of photovoltaic (PV) systems: 1) demonstrating and commercializing a new anti-islanding method utilizing Phasor Measurement Units (PMUs), 2) demonstrating a set of

  15. Bracket for photovoltaic modules

    DOE Patents [OSTI]

    Ciasulli, John; Jones, Jason

    2014-06-24

    Brackets for photovoltaic ("PV") modules are described. In one embodiment, a saddle bracket has a mounting surface to support one or more PV modules over a tube, a gusset coupled to the mounting surface, and a mounting feature coupled to the gusset to couple to the tube. The gusset can have a first leg and a second leg extending at an angle relative to the mounting surface. Saddle brackets can be coupled to a torque tube at predetermined locations. PV modules can be coupled to the saddle brackets. The mounting feature can be coupled to the first gusset and configured to stand the one or more PV modules off the tube.

  16. High Performance Photovoltaic Project Overview

    SciTech Connect (OSTI)

    Symko-Davies, M.; McConnell, R.

    2005-01-01

    The High-Performance Photovoltaic (HiPerf PV) Project was initiated by the U.S. Department of Energy to substantially increase the viability of photovoltaics (PV) for cost-competitive applications so that PV can contribute significantly to our energy supply and environment in the 21st century. To accomplish this, the National Center for Photovoltaics (NCPV) directs in-house and subcontracted research in high-performance polycrystalline thin-film and multijunction concentrator devices. In this paper, we describe the recent research accomplishments in the in-house directed efforts and the research efforts under way in the subcontracted area.

  17. NREL Photovoltaic Program. FY 1994 annual report, October 1, 1993--September 30, 1994

    SciTech Connect (OSTI)

    1995-06-01

    This report summarizes the in-house and subcontracted research and development activities under the National renewable Energy Laboratory (NREL) Photovoltaics (PV) program for fiscal year 1994. Research is organized under the following areas; PV program management; crystalline silicon and advanced devices; thin-film PV technologies; PV manufacturing; PV module and system performance and engineering; and PV applications and markets.

  18. Calibration and Rating of Photovoltaics: Preprint

    SciTech Connect (OSTI)

    Emery, K.

    2012-06-01

    Rating the performance of photovoltaic (PV) modules is critical to determining the cost per watt, and efficiency is useful to assess the relative progress among PV concepts. Procedures for determining the efficiency for PV technologies from 1-sun to low concentration to high concentration are discussed. We also discuss the state of the art in primary and secondary calibration of PV reference cells used by calibration laboratories around the world. Finally, we consider challenges to rating PV technologies and areas for improvement.

  19. Integrating High Penetrations of PV into Southern California

    SciTech Connect (OSTI)

    Kroposki, B.; Mather, B.; Hasper-Tuttle, J.; Neal, R.; Katiraei, F.; Yazdani, A.; Aguero, J. R.; Hoff, T. E.; Norris, B. L.; Parkins, A.; Seguin, R.; Schauder, C.

    2011-01-01

    California regulators recently approved a plan proposed by Southern California Edison (SCE) to install 500 MW of distributed photovoltaic (PV) energy in its utility service territory over the next 5 years. The installations will include 250 MW of utility-owned solar and 250 MW of independently owned solar. SCE expects that the majority of these systems will be commercial-scale rooftop PV systems connected at various points in the distribution system. Each of the SCE rooftop PV systems will typically have a rating of 1-3 MW. To understand the impact of high-penetration PV on the distribution grid, the National Renewable Energy Laboratory (NREL) and SCE brought together a team of experts in resource assessment, distribution modeling, and planning to help analyze the impacts of adding high penetration of PV into the distribution system. Through modeling and simulation, laboratory testing, and field demonstrations, the team will address the issues identified in the analysis by fully examining the challenges, developing solutions, and transitioning those solutions to the field for large-scale deployment. This paper gives an update on the project and discusses technical results of integrating a large number of distributed PV systems into the grid.

  20. Exploring the Economic Value of EPAct 2005's PV Tax Credits

    SciTech Connect (OSTI)

    Bolinger, Mark A; Wiser, Ryan; Ing, Edwin

    2009-08-01

    This CESA - LBNL Case Study examines how much economic value do new and expanded federal tax credits really provide to PV system purchasers, and what implications might they hold for state/utility PV grant programs. The report begins with a discussion of the taxability of PV grants and their interaction with federal credits, as this issue significantly affects the analysis that follows. We then calculate the incremental value of EPAct's new and expanded credits for PV systems of different sizes, and owned by different types of entities. The report concludes with a discussion of potential implications for purchasers of PV systems, as well as for administrators of state/utility PV programs. The market for grid-connected photovoltaics (PV) in the US has grown dramatically in recent years, driven in large part by PV grant or 'buy-down' programs in California, New Jersey, and many other states. The recent announcement of a new 11-year, $3.2 billion PV program in California suggests that state policy will continue to drive even faster growth over the next decade. Federal policy has also played a role, primarily by providing commercial PV systems access to tax benefits, including accelerated depreciation (5-year MACRS schedule) and a business energy investment tax credit (ITC). Since the signing of the Energy Policy Act of 2005 (EPAct) on August 8, the federal government has begun to play a much more significant role in supporting both commercial and residential PV systems. Specifically, EPAct increased the federal ITC for commercial PV systems from 10% to 30% of system costs, and also created a new 30% ITC (capped at $2000) for residential solar systems. Both changes went into effect on January 1, 2006, for an initial period of two years, and in late 2006 were extended for an additional year. Unless extended further, the new residential ITC will expire, and the 30% commercial ITC will revert back to 10%, on January 1, 2009. How much economic value do these new and

  1. GridPV Toolbox

    Energy Science and Technology Software Center (OSTI)

    2014-07-15

    Matlab Toolbox for simulating the impact of solar energy on the distribution grid. The majority of the functions are useful for interfacing OpenDSS and MATLAB, and they are of generic use for commanding OpenDSS from MATLAB and retrieving GridPV Toolbox information from simulations. A set of functions is also included for modeling PV plant output and setting up the PV plant in the OpenDSS simulation. The toolbox contains functions for modeling the OpenDSS distribution feedermore » on satellite images with GPS coordinates. Finally, example simulations functions are included to show potential uses of the toolbox functions.« less

  2. GridPV Toolbox

    SciTech Connect (OSTI)

    Broderick, Robert; Quiroz, Jimmy; Grijalva, Santiago; Reno, Matthew; Coogan, Kyle

    2014-07-15

    Matlab Toolbox for simulating the impact of solar energy on the distribution grid. The majority of the functions are useful for interfacing OpenDSS and MATLAB, and they are of generic use for commanding OpenDSS from MATLAB and retrieving GridPV Toolbox information from simulations. A set of functions is also included for modeling PV plant output and setting up the PV plant in the OpenDSS simulation. The toolbox contains functions for modeling the OpenDSS distribution feeder on satellite images with GPS coordinates. Finally, example simulations functions are included to show potential uses of the toolbox functions.

  3. National Center for Photovoltaics at NREL

    ScienceCinema (OSTI)

    VanSant, Kaitlyn; Wilson, Greg; Berry, Joseph; Al-Jassim, Mowafak; Kurtz, Sarah

    2014-06-10

    The National Center for Photovoltaics at the National Renewable Energy Laboratory (NREL) focuses on technology innovations that drive industry growth in U.S. photovoltaic (PV) manufacturing. The NCPV is a central resource for our nation's capabilities in PV research, development, deployment, and outreach.

  4. National Center for Photovoltaics at NREL

    SciTech Connect (OSTI)

    VanSant, Kaitlyn; Wilson, Greg; Berry, Joseph; Al-Jassim, Mowafak; Kurtz, Sarah

    2013-11-07

    The National Center for Photovoltaics at the National Renewable Energy Laboratory (NREL) focuses on technology innovations that drive industry growth in U.S. photovoltaic (PV) manufacturing. The NCPV is a central resource for our nation's capabilities in PV research, development, deployment, and outreach.

  5. Photovoltaic Energy Program overview, fiscal year 1997

    SciTech Connect (OSTI)

    1998-02-01

    The US Department of Energy (DOE) Photovoltaic Energy Program fosters the widespread acceptance of photovoltaic (PV) technology and accelerates commercial use of US PV products. The Program is founded on a collaborative strategy involving industry, the research and development community, potential users, utilities, and state and federal agencies. There are three main Program elements: Systems Engineering and Applications, Technology Development, and Research and Development.

  6. 3-Port Single-Stage PV & Battery Converter Improves Efficiency and Cost in Combined PV/Battery Systems

    SciTech Connect (OSTI)

    Bundschuh, Paul

    2013-03-23

    Due to impressive cost reductions in recent years, photovoltaic (PV) generation is now able to produce electricity at highly competitive prices, but PV’s inherent intermittency reduces the potential value of this energy. The integration of battery storage with PV will be transformational by increasing the value of solar. Utility scale systems will benefit by firming intermittency including PV ramp smoothing, grid support and load shifting, allowing PV to compete directly with conventional generation. For distributed grid-tied PV adding storage will reduce peak demand utility charges, as well as providing backup power during power grid failures. The largest long term impact of combined PV and battery systems may be for delivering reliable off-grid power to the billions of individuals globally without access to conventional power grids, or for billions more that suffer from daily power outages. PV module costs no longer dominate installed PV system costs. Balance-of-System (BOS) costs including the PV inverter and installation now contribute the majority of installed system costs. Battery costs are also dropping faster than installation and battery power converter systems. In each of these separate systems power converters have become a bottleneck for efficiency, cost and reliability. These bottlenecks are compounded in hybrid power conversion systems that combine separate PV and battery converters. Hybrid power conversion systems have required multiple power converters hardware units and multiple power conversion steps adding to efficiency losses, product and installation costs, and reliability issues. Ideal Power Converters has developed and patented a completely new theory of operation for electronic power converters using its indirect EnergyPacket Switching™ topology. It has established successful power converter products for both PV and battery systems, and its 3-Port Hybrid Converter is the first product to exploit the topology’s capability for the

  7. Denver International Airport Photovoltaic System

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Denver International Airport (DIA) features a 2-megawatt (MW) photovoltaic (PV) system. DIA also hosts to a second 1.6-MW system. Denver is a Solar America City.

  8. Salem Electric- Photovoltaic Rebate Program

    Broader source: Energy.gov [DOE]

    Salem Electric offers a rebate to residential customers who install solar photovoltaic (PV) systems. The rebate offered is $600 for the first three kilowatts (kWs) installed and $300/kW for any...

  9. Rooftop Photovoltaics Market Penetration Scenarios

    SciTech Connect (OSTI)

    Paidipati, J.; Frantzis, L.; Sawyer, H.; Kurrasch, A.

    2008-02-01

    The goal of this study was to model the market penetration of rooftop photovoltaics (PV) in the United States under a variety of scenarios, on a state-by-state basis, from 2007 to 2015.

  10. Rooftop Solar PV & Firefighter Safety

    Broader source: Energy.gov [DOE]

    Solar photovoltaic (PV) installations have experienced significant growth in recent years. Due to technological innovations and cost reductions, solar energy is a viable option for an increasing number of residences and businesses across the United States. Rooftop solar is considered safe – to date there has been no documented case of death from the electric shock, chemical burn or conventional fire caused by a solar panel; however, as more buildings install rooftop solar systems, the likelihood increases that fires will occur on buildings with solar, making it critical for firefighters to receive comprehensive solar education and training. This SolarOPs fact sheet gives a brief overview of typical solar PV installations, addresses the major hazards and risks to firefighters, discusses fire safety in Germany (the country with the most installed solar PV per capita), and suggests recommendations and resources to ensure that first responders are prepared to fight fires on homes and buildings with rooftop solar PV.

  11. Utility-Interconnected Photovoltaic Systems: Evaluating the Rationale for the Utility-Accessible External Disconnect Switch

    SciTech Connect (OSTI)

    Coddington, M.; Margolis, R.M.; Aabakken, J.

    2008-01-01

    The utility-accessible alternating current (AC) external disconnect switch (EDS) for distributed generators, including photovoltaic (PV) systems, is a hardware feature that allows a utility?s employees to manually disconnect a customer-owned generator from the electricity grid. This paper examines the utility-accessible EDS debate in the context of utility-interactive PV systems for residential and small commercial installations. It also evaluates the rationale for EDS requirements.

  12. Ensuring Quality of PV Modules: Preprint

    SciTech Connect (OSTI)

    Kurtz, S.; Wohlgemuth, J.; Hacke, P.; Kempe, M.; Sample, T.; Yamamichi, M.; Kondo, M.; Doi, T.; Otani, K.; Amano, J.

    2011-07-01

    Photovoltaic (PV) customers need to have confidence in the PV modules they purchase. Currently, no test can quantify a module's lifetime with confidence, but stress tests are routinely used to differentiate PV product designs. We suggest that the industry would be strengthened by using the wisdom of the community to develop a single set of tests that will help customers quantify confidence in PV products. This paper evaluates the need for quality assurance (QA) standards and suggests a path for creating these. Two types of standards are needed: 1) QA of the module design and 2) QA of the manufacturing process.

  13. Solar San Diego: The Impact of Binomial Rate Structures on Real PV Systems; Preprint

    SciTech Connect (OSTI)

    VanGeet, O.; Brown, E.; Blair, T.; McAllister, A.

    2008-05-01

    There is confusion in the marketplace regarding the impact of solar photovoltaics (PV) on the user's actual electricity bill under California Net Energy Metering, particularly with binomial tariffs (those that include both demand and energy charges) and time-of-use (TOU) rate structures. The City of San Diego has extensive real-time electrical metering on most of its buildings and PV systems, with interval data for overall consumption and PV electrical production available for multiple years. This paper uses 2007 PV-system data from two city facilities to illustrate the impacts of binomial rate designs. The analysis will determine the energy and demand savings that the PV systems are achieving relative to the absence of systems. A financial analysis of PV-system performance under various rate structures is presented. The data revealed that actual demand and energy use benefits of binomial tariffs increase in summer months, when solar resources allow for maximized electricity production. In a binomial tariff system, varying on- and semi-peak times can result in approximately $1,100 change in demand charges per month over not having a PV system in place, an approximate 30% cost savings. The PV systems are also shown to have a 30%-50% reduction in facility energy charges in 2007.

  14. Creating dynamic equivalent PV circuit models with impedance spectroscopy for arc-fault modeling.

    SciTech Connect (OSTI)

    Johnson, Jay Dean; Kuszmaul, Scott S.; Strauch, Jason E.; Schoenwald, David Alan

    2011-06-01

    Article 690.11 in the 2011 National Electrical Code{reg_sign} (NEC{reg_sign}) requires new photovoltaic (PV) systems on or penetrating a building to include a listed arc fault protection device. Currently there is little experimental or empirical research into the behavior of the arcing frequencies through PV components despite the potential for modules and other PV components to filter or attenuate arcing signatures that could render the arc detector ineffective. To model AC arcing signal propagation along PV strings, the well-studied DC diode models were found to inadequately capture the behavior of high frequency arcing signals. Instead dynamic equivalent circuit models of PV modules were required to describe the impedance for alternating currents in modules. The nonlinearities present in PV cells resulting from irradiance, temperature, frequency, and bias voltage variations make modeling these systems challenging. Linearized dynamic equivalent circuits were created for multiple PV module manufacturers and module technologies. The equivalent resistances and capacitances for the modules were determined using impedance spectroscopy with no bias voltage and no irradiance. The equivalent circuit model was employed to evaluate modules having irradiance conditions that could not be measured directly with the instrumentation. Although there was a wide range of circuit component values, the complex impedance model does not predict filtering of arc fault frequencies in PV strings for any irradiance level. Experimental results with no irradiance agree with the model and show nearly no attenuation for 1 Hz to 100 kHz input frequencies.

  15. NREL Releases Report Describing Guidelines for PV Manufacturer Quality

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Assurance - News Releases | NREL Releases Report Describing Guidelines for PV Manufacturer Quality Assurance International task force aims to toughen standards, ensure reliability of PV technologies April 14, 2015 The Energy Department's National Renewable Energy Laboratory (NREL) has released an updated proposal that will establish an international quality standard for photovoltaic (PV) module manufacturing. The document is intended for immediate use by PV manufacturers when producing

  16. National solar technology roadmap: Film-silicon PV

    SciTech Connect (OSTI)

    Keyes, Brian

    2007-06-01

    Silicon photovoltaic (PV) technologies are addressed in two different technology roadmaps: Film-Silicon PV and Wafer-Silicon PV. This Film-Silicon PV roadmap applies to all silicon-film technologies that rely on a supporting substrate such as glass, polymer, aluminum, stainless steel, or metallurgical-grade silicon. Such devices typically use amorphous, nanocrystalline, fine-grained polycrystalline, or epitaxial silicon layers that are 1–20 μm thick.

  17. Connecticut Rooftop Solar PV Permitting Guide

    Broader source: Energy.gov [DOE]

    The Connecticut Rooftop Solar PV Permitting Guide is a compilation of best practices and resources for solar PV permitting. The guide includes a summary of current codes and regulations affecting solar PV, best practices for streamlining the municipal permitting process, and tools to assist municipalities in creating a streamlined permit process for residential solar PV. Resources include a solar PV permit application, a structural review worksheet, an inspection checklist, and a model solar zoning ordinance.

  18. Environmental, health, and safety assessment of photovoltaics

    SciTech Connect (OSTI)

    Rose, E.C.

    1983-10-15

    Potential enviornmental, health, and safety (E,H and S) concerns associated with all phases of the photovoltaic (PV) energy system life cycle are identified and assessed. E,H and S concerns affecting the achievement of National PV Program goals or the viability of specific PV technologies are emphasized. The report is limited to near-term manufacturing process alternatives for crystalline silicon PV materials, addresses flat-plate and concentrator collector designs, and reviews system deployment in grid-connected, roof-mounted, residential and ground-mounted central-station applications. The PV life-cycle phases examined include silicon refinement and manufacture of PV collectors, system deployment, and decommissioning. The primary E,H and S concerns that arise during collector fabrication are associated with occupational exposure to materials of undetermined toxicity or to materials that are known to be hazardous, but for which process control technology may be inadequate. Stricter exposure standards are anticipated for some materials and may indicate a need for further control technology development. Minimizing electric shock hazards is a significant concern during system construction, operation and maintenance, and decommissioning.

  19. High-Penetration Photovoltaics Standards and Codes Workshop, Denver, Colorado, May 20, 2010: Workshop Proceedings

    SciTech Connect (OSTI)

    Coddington, M.; Kroposki, B.; Basso, T.; Lynn, K.; Herig, C.; Bower, W.

    2010-09-01

    Effectively interconnecting high-level penetration of photovoltaic (PV) systems requires careful technical attention to ensuring compatibility with electric power systems. Standards, codes, and implementation have been cited as major impediments to widespread use of PV within electric power systems. On May 20, 2010, in Denver, Colorado, the National Renewable Energy Laboratory, in conjunction with the U.S. Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE), held a workshop to examine the key technical issues and barriers associated with high PV penetration levels with an emphasis on codes and standards. This workshop included building upon results of the High Penetration of Photovoltaic (PV) Systems into the Distribution Grid workshop held in Ontario California on February 24-25, 2009, and upon the stimulating presentations of the diverse stakeholder presentations.

  20. Climatically Diverse Data Set for Flat-Plate PV Module Model Validations (Presentation)

    SciTech Connect (OSTI)

    Marion, B.

    2013-05-01

    Photovoltaic (PV) module I-V curves were measured at Florida, Colorado, and Oregon locations to provide data for the validation and development of models used for predicting the performance of PV modules.

  1. Annual Report: Photovoltaic Subcontract Program FY 1990

    SciTech Connect (OSTI)

    Summers, K. A.

    1991-03-01

    This report summarizes the progress of the Photovoltaic (PV) Subcontract Program of the Solar Energy Research Institute (SERI) from October 1, 1989 through September 30, 1990. The PV Subcontract Program is responsible for managing the subcontracted portion of SERI's PV Advanced Research and Development Project. In fiscal year 1990, this included more than 54 subcontracts with a total annualized funding of approximately $11.9 million. Approximately two-thirds of the subcontracts were with universities at a total funding of nearly $3.3 million. The six technical sections of the report cover the main areas of the subcontract program: the Amorphous Silicon Research Project, Polycrystalline Thin Films, Crystalline Silicon Materials Research, High-Efficiency Concepts, the New Ideas Program, and the University Participation Program. Technical summaries of each of the subcontracted programs provide a discussion of approaches, major accomplishments in FY 1990, and future research directions. Another section introduces the PVMaT project and reports on its progress.

  2. NREL Photovoltaic Program FY 1993

    SciTech Connect (OSTI)

    Not Available

    1994-08-01

    This report reviews the in-house and subcontracted research and development (R&D) activities under the National Renewable Energy Laboratory (NREL) Photovoltaic (PV) Program from October 1, 1992, through September 30, 1993 (fiscal year [FY] 1993). The NREL PV Program is part of the U.S. Department of Energy`s (DOE`s) National Photovoltaics Program, as described in the DOE Photovoltaics Program Plan, FY 1991 - FY 1995. The FY 1993 budget authority (BA) for carrying out the NREL PV Program was $40.1 million in operating funds and $0.9 million in capital equipment funds. An additional $4.8 million in capital equipment funds were made available for the new Solar Energy Research Facility (SERF) that will house the in-house PV laboratories beginning in FY 1994. Subcontract activities represent a major part of the NREL PV Program, with more than $23.7 million (nearly 59%) of the FY 1993 operating funds going to 70 subcontractors. In FY 1993, DOE assigned certain other PV subcontracting efforts to the DOE Golden Field Office (DOE/GO), and assigned responsibility for their technical support to the NREL PV Program. An example is the PV:BONUS (Building Opportunities in the U.S. for Photovoltaics) Project. These DOE/GO efforts are also reported in this document.

  3. Photovoltaic Module Reliability Workshop 2012: February 28 - March 1, 2012

    SciTech Connect (OSTI)

    Kurtz, S.

    2013-11-01

    NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology--both critical goals for moving PV technologies deeper into the electricity marketplace.

  4. Photovoltaic Module Reliability Workshop 2010: February 18-19, 2010

    SciTech Connect (OSTI)

    Kurtz, J.

    2013-11-01

    NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology--both critical goals for moving PV technologies deeper into the electricity marketplace.

  5. Photovoltaic Module Reliability Workshop 2011: February 16-17, 2011

    SciTech Connect (OSTI)

    Kurtz, S.

    2013-11-01

    NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology--both critical goals for moving PV technologies deeper into the electricity marketplace.

  6. Photovoltaic Module Reliability Workshop 2013: February 26-27, 2013

    SciTech Connect (OSTI)

    Kurtz, S.

    2013-10-01

    NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology--both critical goals for moving PV technologies deeper into the electricity marketplace.

  7. Photovoltaic Module Reliability Workshop 2014: February 25-26, 2014

    SciTech Connect (OSTI)

    Kurtz, S.

    2014-02-01

    NREL's Photovoltaic (PV) Module Reliability Workshop (PVMRW) brings together PV reliability experts to share information, leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology--both critical goals for moving PV technologies deeper into the electricity marketplace.

  8. NREL: National Center for Photovoltaics Home Page

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    National Center for Photovoltaics Research Cell Efficiency Records Chart image Download the latest chart on record cell efficiencies and check out explanatory notes. The National Center for Photovoltaics (NCPV) at the National Renewable Energy Laboratory (NREL) focuses on technology innovations that drive industry growth in U.S. photovoltaic (PV) manufacturing. The NCPV is a central resource for our nation's capabilities in PV research, development, deployment, and outreach. To help the U.S.

  9. Next Generation Photovoltaics 3 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Next Generation Photovoltaics 3 Next Generation Photovoltaics 3 SunShot's next generation PV projects investigate transformational photovoltaic (PV) technologies with the potential to meet SunShot cost targets. The projects' goals are to: Increase efficiency Reduce costs Improve reliability Create more secure and sustainable supply chains. On October 22, 2014, SunShot awarded more than $14 million to 10 research institutions to meet or exceed SunShot targets by improving performance, efficiency,

  10. SERC Photovoltaics for Residential Buildings Webinar Transcript |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Photovoltaics for Residential Buildings Webinar Transcript SERC Photovoltaics for Residential Buildings Webinar Transcript A presentation sponsored by the U.S. Department of Energy about using solar photovoltaics (PV) systems to provide electricity for homes. 20110125_pv_webinar.pdf (109.9 KB) More Documents & Publications Sustainable Energy Resources for Consumers (SERC) - Solar Hot Water Solar Webinar Text Version TAP Webcast Transcript July-29, 2009