Go California Batteries! "California’s Wraps Another Summer Without a Single Flex Alert In 2025, renewable energy sources supplied more than 100% of California’s electricity demand on 206 days, according to grid data. The state’s vast installed base of batteries — now totaling more than 52 gigawatt-hours of capacity, triple that of any other U.S. market — is playing a decisive role in keeping the lights on. 1/2