Energy Vault Holdings Inc. has signed a new agreement with Jupiter Power to deliver another battery energy storage system (BESS) within the ERCOT (Electric Reliability Council of Texas) grid.

The project follows the successful commissioning of a 100MW/200MWh BESS in July 2024 and will match its predecessor in capacity.

Construction on the system is underway, with commercial operation expected by the end of summer 2025. The BESS will use Energy Vault’s X-Vault integration platform and UL9540-certified B-VAULT product and be operated through the company’s VaultOS Energy Management System.

This system supports both AC- and DC-coupled configurations and is designed for flexible integration of battery and inverter suppliers.

“As one of the largest battery storage developers and operators in the U.S., we look for partners who can keep pace with our ambition and scale,” said Michael Geier, Chief Technology Officer, Jupiter Power.

“With more than 2,500MWh in operation or construction, we’re excited to continue building with Energy Vault at this critical site and appreciate their ability to deliver solutions tailored to our needs,”

Marco Terruzzin, Chief Commercial and Product Officer at Energy Vault, added, “Today’s expansion of our partnership with Jupiter Power stands as a testament to the strength of our team’s collaborative approach to delivering reliable, safe, and efficient energy storage solutions to customers.”

The new system forms part of a broader partnership between the two companies, which began in 2022 and includes 2.4GWh of integrated supply chain equipment and services.

Energy Vault’s B-VAULT portfolio currently represents more than 2 GWh of operational or development projects.