DENVER–(BUSINESS WIRE)–Hydrostor, a leading global long duration energy storage (LDES) developer and operator, is pleased to announce that the Willow Rock Energy Storage Center has signed a 50 MW offtake agreement with California Community Power (CC Power) on behalf of six of its community choice aggregator members. The 500 MW / 4,000 MWh advanced compressed air energy storage (A-CAES) project can store energy for eight hours of continuous discharge to the grid, and will provide reliable capa