This past Sunday, California’s grid-scale battery storage hit a record output of 12.3 GW. That surge met around 43% of CAISO’s demand at 7 p.m. local time. Picture it like this: Such a massive output is roughly equivalent to that of six Hoover Dams, Nicolas Fulghum of Ember noted, and it surpasses the all-time peak demand of Portugal or Greece.
Just a few years ago, this feat wouldn’t be possible: California’s battery storage capacity soared from around 120 MW in 2020 to over 16 GW in 2025. 🦅