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Title: A pulse-width modulated, high reliability charge controller for small photovoltaic systems

Abstract

This report presents the results of a development effort to design, test and begin production of a new class of small photovoltaic (PV) charge controllers. Sandia National Laboratories provided technical support, test data and financial support through a Balance-of-System Development contract. One of the objectives of the development was to increase user confidence in small PV systems by improving the reliability and operating life of the system controllers. Another equally important objective was to improve the economics of small PV systems by extending the battery lifetimes. Using new technology and advanced manufacturing techniques, these objectives were accomplished. Because small stand-alone PV systems account for over one third of all PV modules shipped, the positive impact of improving the reliability and economics of PV systems in this market segment will be felt throughout the industry. The results of verification testing of the new product are also included in this report. The initial design goals and specifications were very aggressive, but the extensive testing demonstrates that all the goals were achieved. Production of the product started in May at a rate of 2,000 units per month. Over 40 Morningstar distributors (5 US and 35 overseas) have taken delivery in the first 2more » months of shipments. Initial customer reactions to the new controller have been very favorable.« less

Authors:
 [1];  [2]
  1. Morningstar Corp., Olney, MD (United States)
  2. Morningstar Corp., Encinitas, CA (United States)
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
OSTI Identifier:
459871
Report Number(s):
SAND-97-0329
ON: DE97004744; TRN: 97:002419
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Feb 1997
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; PHOTOVOLTAIC CELLS; BATTERY CHARGING; ELECTRIC CONTROLLERS; DESIGN; BATTERY CHARGERS; RELIABILITY; PULSE TECHNIQUES

Citation Formats

Gerken, K., and Welsh, D. A pulse-width modulated, high reliability charge controller for small photovoltaic systems. United States: N. p., 1997. Web. doi:10.2172/459871.
Gerken, K., & Welsh, D. A pulse-width modulated, high reliability charge controller for small photovoltaic systems. United States. doi:10.2172/459871.
Gerken, K., and Welsh, D. Sat . "A pulse-width modulated, high reliability charge controller for small photovoltaic systems". United States. doi:10.2172/459871. https://www.osti.gov/servlets/purl/459871.
@article{osti_459871,
title = {A pulse-width modulated, high reliability charge controller for small photovoltaic systems},
author = {Gerken, K. and Welsh, D.},
abstractNote = {This report presents the results of a development effort to design, test and begin production of a new class of small photovoltaic (PV) charge controllers. Sandia National Laboratories provided technical support, test data and financial support through a Balance-of-System Development contract. One of the objectives of the development was to increase user confidence in small PV systems by improving the reliability and operating life of the system controllers. Another equally important objective was to improve the economics of small PV systems by extending the battery lifetimes. Using new technology and advanced manufacturing techniques, these objectives were accomplished. Because small stand-alone PV systems account for over one third of all PV modules shipped, the positive impact of improving the reliability and economics of PV systems in this market segment will be felt throughout the industry. The results of verification testing of the new product are also included in this report. The initial design goals and specifications were very aggressive, but the extensive testing demonstrates that all the goals were achieved. Production of the product started in May at a rate of 2,000 units per month. Over 40 Morningstar distributors (5 US and 35 overseas) have taken delivery in the first 2 months of shipments. Initial customer reactions to the new controller have been very favorable.},
doi = {10.2172/459871},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {2}
}