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Consequences of the length of the billing period at net billing of solar electricity; Konsekvenser av avraekningsperiodens laengd vid nettodebitering av solel

Technical Report:

Abstract

The way that owners of PV systems are handled today gives, in practice, an advantage to installations of very small PV systems relative to what would be possible if all appropriately oriented roof and facade surfaces were fully exploited. This problem occurs because there is a surplus of PV electricity for the system owner, who receives a zero or low value in relation to the electricity purchases that are avoided. For single-family houses, this means that without net billing it is economically optimal to install only up to about 2-7 m2 of the approximately 60 m2 that are available on the roof of a single-family house. Other end-user types, such as multi-family buildings, agriculture and industry, also show low use of available surfaces. With the current system, the major part of the possible PV production on buildings is hindered. This electricity production does not exploit any new land and has a potential in Sweden of about 10-15 TWh, assuming that 25% of the roof and wall surfaces that have at least 70% of optimum solar radiation are exploited. The effects of five different scenarios, without and with monthly or annual net billing for an electricity consumer who is also a  More>>
Publication Date:
Dec 15, 2010
Product Type:
Technical Report
Report Number:
ELFORSK-10-93
Resource Relation:
Other Information: 27 refs., 42 figs., 10 tabs.
Subject:
14 SOLAR ENERGY; SOLAR POWER PLANTS; DISTRIBUTED STRUCTURES; BUILDINGS; ROOFS; ELECTRIC UTILITIES; POWER SYSTEMS; FINANCIAL INCENTIVES
OSTI ID:
1004332
Research Organizations:
Elforsk AB, Stockholm (Sweden)
Country of Origin:
Sweden
Language:
Swedish
Other Identifying Numbers:
TRN: SE1107018
Availability:
Available from: Elforsk AB, SE-10153 Stockholm, Sweden; E-mail: kontakt@elforsk.se or from homepage: www.solelprogrammet.se
Submitting Site:
SWD
Size:
89 p. pages
Announcement Date:
Feb 07, 2011

Technical Report:

Citation Formats

Molin, Andreas, Widen, Joakim, Stridh, Bengt, and Karlsson, Bjoern. Consequences of the length of the billing period at net billing of solar electricity; Konsekvenser av avraekningsperiodens laengd vid nettodebitering av solel. Sweden: N. p., 2010. Web.
Molin, Andreas, Widen, Joakim, Stridh, Bengt, & Karlsson, Bjoern. Consequences of the length of the billing period at net billing of solar electricity; Konsekvenser av avraekningsperiodens laengd vid nettodebitering av solel. Sweden.
Molin, Andreas, Widen, Joakim, Stridh, Bengt, and Karlsson, Bjoern. 2010. "Consequences of the length of the billing period at net billing of solar electricity; Konsekvenser av avraekningsperiodens laengd vid nettodebitering av solel." Sweden.
@misc{etde_1004332,
title = {Consequences of the length of the billing period at net billing of solar electricity; Konsekvenser av avraekningsperiodens laengd vid nettodebitering av solel}
author = {Molin, Andreas, Widen, Joakim, Stridh, Bengt, and Karlsson, Bjoern}
abstractNote = {The way that owners of PV systems are handled today gives, in practice, an advantage to installations of very small PV systems relative to what would be possible if all appropriately oriented roof and facade surfaces were fully exploited. This problem occurs because there is a surplus of PV electricity for the system owner, who receives a zero or low value in relation to the electricity purchases that are avoided. For single-family houses, this means that without net billing it is economically optimal to install only up to about 2-7 m2 of the approximately 60 m2 that are available on the roof of a single-family house. Other end-user types, such as multi-family buildings, agriculture and industry, also show low use of available surfaces. With the current system, the major part of the possible PV production on buildings is hindered. This electricity production does not exploit any new land and has a potential in Sweden of about 10-15 TWh, assuming that 25% of the roof and wall surfaces that have at least 70% of optimum solar radiation are exploited. The effects of five different scenarios, without and with monthly or annual net billing for an electricity consumer who is also a PV electricity producer have been studied for ten different building types, including three single-family houses, two multi-family buildings and five other properties. The implications for four actors - the solar electricity producer, the grid owner, the electricity trader and the Swedish state - have been calculated. It is thus 200 different combinations that are reported. For each combination the outcome at any system size can also be seen in the reported figures. The amount of saved electricity for the PV owner depends substantially on the time-horizon of the net billing period. Monthly net billing would drastically improve the utilization of roof areas, but still limits the utilization. Annual net billing gives a similar additional improvement. With annual net billing, the roofs of all the studied types of properties could be covered either entirely with solar cells or as much as needed to cover the annual needs of electricity. A net billing limit, for example 63A=43.5 kW=313 m2, would be a size delimiter for larger buildings. Grid owners would be affected in the form of reduced revenues for the electricity transfer, reduced losses in the local grid and increased revenue from excess electricity which the PV owner donates to the grid. For electricity traders increasing system size means that sales to the PV owner decrease in the same way as bought electricity is saved for the PV owner. The balance responsible actor (BA), which takes care of generated solar electricity, can usually make a profit due to the price profile. This could also be the grid owner, or the BA designated by the grid owner, or an electricity trader chosen by the system owner depending on how the net billing is handled. If the same electricity trader is affected by the reduction in electricity sales and earnings due to the price profile, this will be favourable for the electricity trader. Looking at tax from PV installations, net billing has the same economic effect as if the PV owner had made an energy efficiency measure. The calculations have not taken into account the state's tax revenue of the investment, which today is higher than the loss of revenue for energy tax and VAT. For the further development of the PV market in Sweden it is of utmost importance to make it possible, as soon as possible, for PV system owners to get a reasonable compensation for their excess electricity. Net billing would be an easy way to solve this problem. The most practical and easiest way to achieve net billing would be if the grid owner could send a net value to the electricity trader. The period for net billing should be longer than one month if all available roof and wall areas are to be optimally utilized}
place = {Sweden}
year = {2010}
month = {Dec}
}