This webinar will showcase how business models of PV-battery hybrids influence dispatch decisions and market value and highlight related excerpts of our Solar-to-Grid report, describing the historical contribution to reliability, trends in market value, and impacts on the bulk power system of solar deployed in the U.S. through the end of 2020.
PV-battery hybrid projects dominate interconnection queues in some regions in the United States, but few projects have been operational long enough to assess how the hybrid capabilities may be used in practice. We interview plant operators and analyze empirical dispatch data for eleven large-scale PV-battery hybrids in three organized wholesale markets in the United States. We use the dispatch data and wholesale market prices to estimate the market value of our sample hybrids in 2020. In contrast to the widespread assumptions in the PV-battery hybrid modeling literature, only three of the eleven project operators optimize battery usage for wholesale market revenue as merchant plants. Instead, the majority of operators in the sample have alternate objectives. For example, load-serving entities target peak load reductions, incentive program participants focus on compliance with program requirements, and large energy consumers prioritize resiliency and utility bill minimization. Understanding prevalent dispatch signals and the degree of alignment with system-wide grid needs can increase the market value of PV-battery hybrids.
Dr. Andrew D. Mills is a Research Scientist at Berkeley Lab and leads research on the integration of variable generation into the electric power system.
Dr. Jo Seel is a Senior Scientific Engineering Associate at Berkeley Lab and works on solar and wind power market integration issues.
Cody Warner is a Graduate Student Research Associate at Berkeley Lab and studies solar market developments.