Hydrostor signs offtake agreement with California Community Power for 4 GWh A-CAES project
500 MW
Capacity
development
Stage
Willow Rock Energy Storage Center
Project
Hydrostor has signed a 50 MW/400 MWh offtake agreement with California Community Power (CC Power) for its Willow Rock Energy Storage Center project. The agreement secures storage capacity for six of CC Power’s community choice aggregator members. The 500 MW/4,000 MWh advanced compressed air energy storage (A-CAES) facility is designed to deliver eight hours of continuous discharge to the grid. The facility is expected to come online in 2030.
Deal Analysis
Hydrostor's offtake agreement with California Community Power (CC Power) for the Willow Rock Energy Storage Center represents a significant step forward in the development of advanced compressed air energy storage (A-CAES) technology. The agreement secures 50 MW/400 MWh of the facility's total 500 MW/4,000 MWh capacity for six of CC Power's community choice aggregator members, demonstrating a commitment to long-duration energy storage solutions. This project, slated to come online in 2030, aims to provide eight hours of continuous discharge to the grid, addressing the growing need for reliable and flexible energy resources in California.
The Willow Rock Energy Storage Center is a notable project due to its large scale and the involvement of multiple community choice aggregators. The participation of CC Power members like CleanPowerSF, Peninsula Clean Energy, Redwood Coast Energy Authority, San José Clean Energy, Silicon Valley Clean Energy Authority, and Valley Clean Energy Authority highlights the increasing interest in collaborative energy procurement strategies. Furthermore, the potential involvement of suppliers like Tesla and Chint Power suggests a diverse supply chain supporting the project's development. Hydrostor's experience in A-CAES technology, as evidenced by its previous joint venture, positions it as a key player in this emerging sector.
- Large-scale A-CAES project with 500 MW/4,000 MWh capacity.
- Offtake agreement secures 50 MW/400 MWh for six community choice aggregators.
- Demonstrates commitment to long-duration energy storage.
- Involves Hydrostor, a developer with experience in A-CAES technology.
Market Context: The energy storage market, particularly in California, is experiencing rapid growth driven by the increasing penetration of renewable energy sources and the need for grid stabilization. Long-duration energy storage technologies like A-CAES are gaining traction as viable solutions to address the intermittency challenges associated with solar and wind power.
Timeline
Announced
Feb 13, 2026
Signed
Feb 13, 2026
Closed
Counterparts (10)
Offtaker
California Community Power
California Community Power is a joint powers agency comprised of locally controlled, not-for-profit ...
CleanPowerSF
CleanPowerSF is a Community Choice Aggregation (CCA) program in San Francisco, offering renewable, a...
Peninsula Clean Energy
Peninsula Clean Energy (PCE) is a community choice aggregator (CCA) serving San Mateo County and Los...
Redwood Coast Energy Authority
Redwood Coast Energy Authority (RCEA) is a local government agency in Humboldt County, California, f...
San José Clean Energy
San José Clean Energy (SJCE) is a Community Choice Energy program committed to adding renewable ener...
Silicon Valley Clean Energy Authority
Silicon Valley Clean Energy (SVCE) is a public, not-for-profit agency providing clean electricity to...
Valley Clean Energy Authority
Valley Clean Energy is a locally governed not-for-profit electricity provider for Davis, Woodland, W...
Market Context
This deal is part of the Storage sector in Australia.
108
Storage deals
106
deals in Australia
1 of 103 Storage deals tracked this month · Updated daily
Global Infrastructure Sherpa