Sunrun and Tesla report 745 MW home-battery dispatch in California
Home batteries operated by Sunrun and Tesla supplied 745 megawatts of peak power to California’s grid on October 6 during a prolonged heat wave, Sunrun reported on October 14.
Published October 18, 2026Briefs / Energy / Grid Technology
Home batteries operated by Sunrun and Tesla supplied 745 megawatts of peak power to California’s grid on October 6 during a prolonged heat wave, Sunrun reported on October 14. The companies had delivered 669 MW the previous evening.
The batteries discharged during multi-hour evening peaks at the request of the California Energy Commission and utilities. On both days, the state’s Demand Side Grid Support program was triggered after day-ahead electricity prices exceeded $200 per megawatt-hour. Sunrun says it has more than 120,000 residential batteries enrolled to support California’s grid.
Sunrun described the October 6 dispatch as a U.S. residential distributed-power record, exceeding the 580 MW reported on September 9. The 745 MW figure measures peak power, not the total energy supplied throughout the event; the announcement did not give that total in megawatt-hours. It nevertheless shows the scale of coordinated household storage already being used for evening grid support.