California VPP Links 100,000 Residential Storage Batteries - CleanTechnica

On July 29, 2025, California made history by linking approximately 100,000 residential battery storage units in a large-scale Virtual Power Plant (VPP) test, collectively supplying about 535 megawatts of electricity to the grid during peak demand hours. This initiative, led by PG&E in partnership with Tesla and Sunrun, demonstrated the ability of distributed batteries to respond quickly, reliably, and in coordination to support grid stability without causing blackouts or emergencies. The test involved customers across Northern, Central, and Southern California, including underserved and rural communities prone to outages, highlighting the potential of VPPs to alleviate grid stress and reduce reliance on fossil fuel power plants. The California Public Utilities Commission and California Energy Commission have developed programs like the Emergency Load Reduction Program (ELRP) and Demand Side Grid Support (DSGS) to incentivize electricity reduction or backup power provision during peak stress periods. The July 29 test served as a real-world rehearsal to validate these programs and the operational