LUGANO, WESTLAKE VILLAGE, SACRAMENTO-- September 13, 2022 -- Energy Vault Holdings Inc. (NYSE: NRGV) (“Energy Vault” or the “Company”), a leader in sustainable, grid-scale energy storage solutions, today announced the signing of the Stanton Energy Storage System (SESS) EPC contract with Wellhead Electric Company, Inc. (“Wellhead Electric”) and W Power, LLC, (“W Power”), a woman-owned business enterprise that has developed and owned power generation facilities in California. The project will be operated by Wellhead Services, Inc., one of the most experienced developers and operators of innovative energy generation and energy storage facilities in California, which is based in Sacramento, California.

Energy Vault will begin deployment immediately in 2022 of a 275.2 MWh battery storage project at W Power’s Energy Reliability Center in Stanton, California. The project is on an accelerated timeline to meet critical power needs for southern California and is expected to be completed in mid-2023. Energy Vault will also support W Power and Wellhead with development and deployment of future energy storage projects in California representing approximately 600 MWh+ of additional capacity in the near term.

The system will be built on Energy Vault Solutions’ (EVS) proprietary integration platform and powered by EVS’ energy management software. The EVS platform, which was introduced in Q4 2021, leverages the most advanced software architecture and optimization algorithms, and enables the integration and orchestration of multiple energy assets under a multitude of use cases. Together with the Company’s existing sustainable long duration gravity energy storage technology offering, Energy Vault continues to advance the global transition to a carbon-free, resilient power grid.

"We look forward to developing this project with Wellhead and W Power that will be built on our proprietary system and reflects execution on our previously announced EVS strategy,” said Robert Piconi, Chairman and Chief Executive Officer, Energy Vault. “This exciting project reflects our broad energy storage experience and capabilities across multiple underlying storage technologies while optimizing energy density and performance requirements that was a key factor to meet Wellhead’s requirements. The demanding deployment timelines and need for surety of execution exhibit our ability to be customer focused, nimble and responsive to the rapidly-expanding needs of the global storage market.”

“Our EVS-enabled solutions are the natural complement to Energy Vault’s long-duration gravity storage capabilities which are being deployed globally in parallel, and a key component of our vision of being a leading energy storage technology partner to our customers that require innovation and creativity in dealing with the complexities of the grid,” continued Mr. Piconi. “With EVS we have been able to expand our serviceable market and we are proud to offer a broad portfolio of solutions, from short to long duration, with our EVxTM gravity-based technology, that help customers achieve their decarbonization targets while maximizing economic returns. This is fundamental to the mission of the Company.”

“The team at Energy Vault has greatly impressed us with both their extensive knowledge of energy storage solutions and their critical engineering, integration, and construction experience,” said Hal Dittmer, CEO, Wellhead Electric. “They have won our trust because of their dedication to find the optimal solution for our Stanton site. In addition, because of the EVS technological platform, with the highest energy density and safety features, we were able to fit the maximum energy storage capacity at our site, with full confidence of meeting our expected system performance and project economic return requirements.”