The West and Midwest favor solar-plus-storage; the East favors gas


California’s interconnection queue included 29 GW of proposed solar-plus-storage plants as of year-end 2019, while Western utilities’ queues had another 33 GW, as shown with yellow bars below (CAISO and West non-ISO).

Yet planned gas units totaled only 0.2 GW in California’s queue and 4 GW in Western utilities’ queues.

The data are from a Lawrence Berkeley National Laboratory report and data visualization tool, both focusing on utility-scale hybrid generators, such as solar-plus-storage.

While the majority of plants proposed in the interconnection queues “are not subsequently built,” says the report, a Western trend favoring solar-plus-storage over gas units seems clear.

Solar plus 4-hour storage has been found to have a 99.8% capacity value in California, easily matching gas.

The Midwest shows signs of a similar trend, as the region’s interconnection queues (ERCOT, MISO and SPP above) had 21 GW of proposed solar-plus-storage plants at year-end 2019, well above the 13 GW of proposed gas units.

Gas is still favored in the East, as Eastern queues had 59 GW of proposed gas units at year-end 2019 (shown in blue below, counting Southeast non-ISO, PJM, NYISO, and ISO-NE), and only 13 GW of proposed solar-plus-storage plants.

Overall, 28% of solar projects in the interconnection queues include storage.

This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: