Figure
In the 6-to-8 PM window, median battery discharge rose from near zero in 2019 to 5.4 GW in 2025, and evening gas burn fell about 3 GW over the same years, though gas remains the larger evening source.
This figure is from the Southern California Edison case study, a primary-source look at how California procured storage and what pointing the same playbook at demand would add.
Cite this figure
Corey Balgeman, "Battery discharge and gas burn on the CAISO evening ramp, 2019-2025," Grid Flexibility, 2026. https://gridflexibility.fyi/case-studies/southern-california-edison/figures/storage-vs-gas-evening
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Last updated: 2026-07-03.
