First Year in Operation: Performance Lessons From a 100-MW/400-MWh CAISO Battery

Battery energy storage promises fast response, grid flexibility, and predictable output, yet most discussions rely on modeled projections rather than actual operating data. This article presents first year performance results from Caballero, a 100-MW/400-MWh battery energy storage system (BESS) active in the California Independent System Operator (CAISO) grid since early 2025. It also examines a […] The post First Year in Operation: Performance Lessons From a 100-MW/400-MWh CAISO Battery appeared first on POWER Magazine .