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Pacific Gas & Electric Co. and Energy Vault, a Swiss-based energy storage developer, announced Thursday a partnership to operate a utility-scale battery plus green hydrogen long-duration energy storage system in Northern California.
The hybrid system, with at least 293 MWh of dispatchable carbon-free energy, would be capable of powering about 2,000 electric customers on a PG&E microgrid in Calistoga, California. It’s expected to provide a minimum of 48 hours of backup power in outages and would be the first of its kind and largest utility-scale green hydrogen project in the U.S., Energy Vault said.
The energy storage system, which must be approved by California regulators, would be owned, operated and maintained by Energy Vault, headquartered in Lugano, Switzerland, while providing power in a long-term tolling agreement with PG&E. The system’s capacity may be expanded to 700 MWh, allowing it to operate longer without refueling, Energy Vault said.
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