Lengthy-duration vitality storage developer Hydrostor has signed a 50-MW offtake settlement with California Group Energy (CC Energy) for the Willow Rock Vitality Storage Middle.
The 500-MW/4,000-MWh advanced compressed air energy storage (A-CAES) venture can retailer vitality for eight hours of steady discharge to the grid, and can present dependable capability to the six neighborhood selection aggregator members of CC Energy.
A rendering of the Willow Rock compressed-air LDES by Hydrostor.
“Hydrostor’s Willow Rock venture brings much-needed grid advantages to California by offering dependable long-duration vitality storage capability utilizing home content material, off-the-shelf turbomachinery and solely air and water to retailer vitality,” stated Alexander Morris, CC Energy Common Supervisor. “CC Energy strives to advance California’s vitality objectives by contracting with novel, high-potential applied sciences and is happy to associate with Hydrostor on this revolutionary vitality storage answer that improves reliability and diversifies California’s grid whereas supporting native employment and funding.”
The six CC Energy members taking part within the offtake settlement are CleanPowerSF, Peninsula Clear Vitality, Redwood Coast Vitality Authority, San Jose Clear Vitality, Silicon Valley Clear Vitality Authority and Valley Clear Vitality Authority.
“Via this settlement with CC Energy, we’re demonstrating how A‑CAES will be deployed at significant scale to satisfy rising reliability wants whereas providing a value‑aggressive, infrastructure‑prepared answer for utilities navigating fast load development,” added Jordan Cole, Hydrostor’s Chief Industrial Officer. “Willow Rock is a robust instance of how our industrial technique interprets into actual tasks delivering vital worth for purchasers and communities.”
The Willow Rock venture acquired its California Vitality Fee allow in December of final 12 months, its franchise settlement from the Kern County Board of Supervisors earlier the identical month, in addition to a conditional letter of assist from the Kern County Board of Supervisors in April of 2025. The venture is anticipated to come back on-line in 2030.
The Willow Rock Vitality Storage Middle is Hydrostor’s first utility-scale venture being inbuilt the USA, constructing on its operational project in Ontario, Canada. The corporate is growing one other late-stage venture in New South Wales, Australia, and has a 7-GW venture pipeline globally, with tasks in the USA, Australia, Canada and the UK.
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