Energy Vault Holdings (Energy Vault), a global leader in sustainable, grid-scale energy storage solutions, and Pacific Gas and Electric Company (PG&E), a subsidiary of PG&E Corporation, announced the successful completion and commercial operation of the Calistoga Resiliency Center (CRC).

This first-of-its-kind hybrid microgrid integrates advanced hydrogen fuel cells with lithium-ion batteries, delivering a fully sustainable energy solution designed to strengthen power resiliency for communities facing wildfire and climate-driven grid disruptions.

The CRC represents a transformative step in addressing the impacts of Public Safety Power Shutoffs (PSPS). The 293-megawatt hour (MWh) system ensures a minimum of 48 hours of continuous energy supply with a peak power output of 8.5 megawatts (MW) during PSPS events.

By combining zero-emission hydrogen fuel cells with Energy Vault’s B-VAULT DC battery technology, the system provides black-start capability, grid-forming services, and instantaneous response, ensuring uninterrupted energy and grid stability. The use of liquid hydrogen further enables extended operation while reducing costs for resiliency services.

“This project is a major milestone in our mission to deliver sustainable, resilient energy solutions to communities most vulnerable to climate-driven grid disruptions,” said Craig Horne, Senior Vice President, Advanced Energy Solutions at Energy Vault.

“The Calistoga Resiliency Center exemplifies the power of innovation and partnership while advancing our ‘Own & Operate’ strategy to deliver long-term value through recurring revenue and measurable community impact.”

The project was financed through $28 million in funding, including the monetization of the Investment Tax Credit associated with the facility. Energy Vault owns and operates the system in collaboration with PG&E, which serves as the utility partner and distribution system operator under a long-term energy services agreement. The CRC builds on Energy Vault’s expanding portfolio of owned and operated projects, following the recent completion of the Cross Trails BESS, and stands as a blueprint for future deployments across California and other wildfire-prone regions.

“PG&E is committed to delivering innovations that enhance electric system safety and reliability while reducing costs for our customers,” said Mike Delaney, Vice President of Utility Partnerships and Innovation at PG&E. “The Calistoga Resiliency Center is the right solution for PG&E, for Calistoga, and for the planet. It demonstrates how advanced, renewable microgrids can keep communities powered safely and sustainably during extreme weather events.”