Energy Vault Achieves Major Strategic Milestone with Commercial Operation of Cross Trails BESS, Marking the First Asset Placed in Service Under “Own & Operate” Growth Strategy

57 MW two-hour battery energy storage system (BESS) in Snyder, Texas now providing energy and ancillary services at highly attractive node in the Electric Reliability Council of Texas (ERCOT) region

Project placed in service ahead of schedule as the first project completed under Energy Vault’s growing portfolio of “Owned & Operated” projects with a 10-year offtake agreement with Gridmatic providing guaranteed revenue floor plus upside participation

Energy Vault’s globally diversified portfolio now totals 725 MW / 3,700 MWh in progressive development phases over the past 18 months across the U.S., Australia, and Italy. The portfolio includes energy storage solutions with durations ranging from 2 to 8 hours, specifically designed to maximize financial returns while minimizing risk through long term, contracted revenue agreements

Energy Vault Holdings Inc. (NYSE: NRGV) ("Energy Vault" or the “Company”), a leader in sustainable, grid-scale energy storage solutions, today announced the successful completion and start of commercial operation of the 57 MW two-hour Cross Trails BESS in Scurry County, Texas. The project, which marks the first fully executed asset under Energy Vault’s “Own & Operate” growth strategy, was completed ahead of schedule and will be supported by a 10-year offtake agreement with Gridmatic, a leading AI-enabled power marketer.

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Energy Vault Achieves Major Strategic Milestone with Commercial Operation of Cross Trails BESS, Marking the First Asset Placed in Service Under “Own & Operate” Growth Strategy

The Cross Trails BESS is now operating to provide energy and ancillary services to meaningfully support renewable energy production and improve grid resiliency in the Electric Reliability Council of Texas (ERCOT) region. Energy Vault notably achieved mechanical completion of the Cross Trails BESS ahead of schedule, successfully meeting all construction milestones through effective project management and close collaboration among engineering, procurement, and construction teams. Commissioning began immediately thereafter, and ERCOT’s Checklist Part 3—including all required commissioning tests and documentation—was also completed early, allowing the project to enter commercial operation ahead of plan. This accelerated timeline was further enabled by Energy Vault’s second-generation B-VAULT™ AC system, whose modular, pre-integrated design supports rapid installation and energization.

The BESS leverages Energy Vault's fully integrated solution stack of hardware, software, and service offerings. Cross Trails will also serve as the first deployment of Energy Vault's second-generation B-VAULT™ AC product, enabling Energy Vault to deliver the system quickly and at low cost while also providing higher levels of system availability in the ERCOT region. The system is equipped with Energy Vault’s VaultOS™ Energy Management System to control, manage and optimize the BESS operations.

Importantly, the offtake agreement is the first physically settled revenue floor contract to be signed for a BESS in ERCOT. The agreement is backed by Gridmatic’s previously announced Energy Storage Fund, and will provide both Energy Vault and Gridmatic with the benefit of Gridmatic’s AI-based forecasts, which have delivered the top Day Ahead energy trading results in the ERCOT market. As part of the agreement, Gridmatic will also provide QSE services.

“This milestone demonstrates the unique ability of the Energy Vault team to execute complex energy storage deployments with speed, quality, and attractive economics,” said Marco Terruzzin, Chief Revenue Officer, Energy Vault. “Completing Cross Trails ahead of schedule and achieving ERCOT certification early is a testament to our team’s expertise and the commitment of the entire leadership team to delivering long-term, sustainable shareholder value under the ‘Own & Operate’ growth strategy announced in 2024.”

The completion of the Cross Trails BESS marks a significant milestone related to Energy Vault’s “Own & Operate” strategy, demonstrating the Company’s ability to execute on its strategic vision while maximizing capital efficiency. This project serves as a reflection of the Company’s ability to leverage its expertise in designing, building and operating energy storage assets under the most efficient capital and operating expense profiles, supported by its project financing and ITC sales engagements which will continue to put cash back on the balance sheet.

About Energy Vault

Energy Vault^® develops, deploys and operates utility-scale energy storage solutions designed to transform the world's approach to sustainable energy storage. The Company's comprehensive offerings include proprietary battery, gravity and green hydrogen energy storage technologies supporting a variety of customer use cases delivering safe and reliable energy system dispatching and optimization. Each storage solution is supported by the Company’s technology-agnostic energy management system software and integration platform. Unique to the industry, Energy Vault’s innovative technology portfolio delivers customized short, long and multi-day/ultra-long duration energy storage solutions to help utilities, independent power producers, and large industrial energy users significantly reduce levelized energy costs while maintaining power reliability. Since 2024, Energy Vault has executed an “Own & Operate” asset management strategy developed to generate predictable, recurring and high margin tolling revenue streams, positioning the Company for continued growth in the rapidly evolving energy storage asset infrastructure market. Please visit www.energyvault.com for more information.

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