PPA signed for 500 MW/4,000 MWh advanced compressed air energy storage (A-CAES) project in USA
Hydrostor announced 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 six CC Power members who are participating in the offtake agreement are CleanPowerSF, Peninsula Clean Energy, Redwood Coast Energy Authority, San Jose Clean Energy, Silicon Valley Clean Energy Authority, and Valley Clean Energy Authority.
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 capacity to the six CC Power members, supporting their objectives of procuring clean, reliable, long duration storage capacity within the California grid.
The Willow Rock project received its California Energy Commission permit in December of last year, its franchise agreement from the Kern County Board of Supervisors earlier the same month, as well as a conditional letter of support from the Kern County Board of Supervisors in April of 2025. The project is expected to come online in 2030.
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