Figure

Standalone storage versus demand response on California's resource-adequacy books, 2019 to 2025

Standalone grid batteries grew from about 0.2% of California's resource adequacy in 2019 (89 MW) to about 17.5% in 2025 (about 10.4 GW), passing the entire demand-response fleet in 2022, while all demand response slipped from about 1,850 MW to 1,140 MW (part of that drop is a counting-method change, in 2022 and again in 2024). The battery series is the September resource-adequacy filings; demand response is the market monitor's summer figure.

Bar and band chart of California resource-adequacy megawatts, 2019 to 2025. Standalone grid-battery RA rises from 89 MW (0.2%) in 2019 to about 10,411 MW (17.5%) in 2025, crossing the demand-response level in 2022. The all-demand-response band runs from about 1,847 MW (2020) down to about 1,140 MW (summer 2025).

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, "Standalone storage versus demand response on California's resource-adequacy books, 2019-2025," Grid Flexibility, 2026. https://gridflexibility.fyi/case-studies/southern-california-edison/figures/ra-currency-ramp

Licensed CC BY 4.0: free to republish with attribution. License details.

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Last updated: 2026-07-31.