Energy Vault (NYSE: NRGV) and Pacific Gas and Electric (NYSE: PCG) are partnering to deploy and operate a long-duration energy storage system in California. The battery plus green hydrogen system (BH-ESS) will have a minimum capacity of 293 MWh and will power the northern California city of Calistoga for 48 hours during planned outages and potential public safety power shutoffs. 

The system's capacity may be expanded to 700 MWh, enabling longer operation without refueling. The battery plus green hydrogen system will replace mobile diesel generators used to energize Pacific Gas and Electric's Calistoga microgrid during outages. 

Construction is set to begin in Q4 2023, with commercial operation expected by Q2 2024. The project will be the first and largest utility-scale green hydrogen project in the US upon completion.

Robert Piconi, Chairman and Chief Executive Officer, Energy Vault stated: “We are setting a new benchmark for what can be achieved with an innovative design that integrates the most advanced energy storage mediums in order to deliver a fully renewable green hydrogen battery energy storage system.” 

Pacific Gas and Electric is a combined natural gas and electric utility serving more than 16 million people across 70,000 square miles in Northern and Central California.

Energy Vault develops and deploys utility-scale energy storage solutions designed to transform the world's approach to sustainable energy storage. 

Shares of Energy Vault trade on the NYSE under the ticker symbol NRGV. Shares of Pacific Gas and Electric trade on the NYSE under the ticker symbol PCG.