Breakeven Prices for Photovoltaics on Supermarkets in the United States

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

National Renewable Energy Laboratory (U.S.)

关键词: Rooftop;    Sam;    Supermarket;    Big-Box;    Commercial;   

DOI  :  10.2172/1071982
RP-ID  :  NREL/TP-6A20-57276
RP-ID  :  AC36-08GO28308
RP-ID  :  1071982

美国|英语

来源: UNT Digital Library

【 摘 要 】

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.