Comprehensive technical due diligence evaluation of B-VAULT™ provides third-party assessment of performance, safety and reliability

Report highlights uniqueness of the flexibility and integration capabilities of B-VAULT to meet a wide range of grid applications

Energy Vault Holdings, Inc. (NYSE: NRGV) ("Energy Vault" or the “Company”), a leader in sustainable, grid-scale energy storage solutions, today announced that it has received a comprehensive, successful due diligence evaluation, commonly referred to in the industry as a “Bankability Report”, of its UL9540 factory-certified, B-VAULT™ battery energy storage system (BESS) from DNV, a leading independent assurance and risk management provider. The report acknowledges that B-VAULT fully conforms to the industry’s expectations for performance, safety and reliability.

DNV’s technical review provides both lenders and customers, evaluating the B-VAULT for their energy storage projects, with a detailed review of Energy Vault’s B-VAULT BESS solution concluding it is compliant with typical industry safety standards and regulations, meets expectations for performance and integration, and is technically sound. The thorough evaluation encompassed various aspects of B-VAULT, including suppliers, designs, and integration capabilities. The evaluation was conducted over six months and included a visit by DNV personnel to the B-VAULT production factory.

Highlights from DNV’s independent technical due diligence report include:

Integration and Flexibility

DNV recognized that the scope and flexible installation capacity of Energy Vault’s B-VAULT solution can address the site-specific requirements of a wide range of customers. The report highlights Energy Vault’s process of delivering turn-key systems that are factory built, tested, and shipped to a project site ready for simple and economical installation process and commissioning. Energy Vault’s B-VAULT solution is designed to meet a wide range of diverse customer needs and has the capability to incorporate battery cells with multiple different chemistries, various cell capacities, and from multiple suppliers. Energy Vault is proud to note that DNV recognized the uniqueness of B-VAULT’s DC (external inverter) and AC (inside of the enclosure modular-inverter) offerings within the industry.

Thermal Management

DNV acknowledges the strengths of B-VAULT’s thermal management system, which combines liquid-cooling and air-cooling for components within the enclosure. The combination of liquid-cooling for battery racks and air-conditioning for general enclosure temperature control and dehumidification ensures optimal system performance.

Safety

DNV's thorough evaluation recognized Energy Vault for including protection systems for fire and other hazards into the B-VAULT solution that comply with regulatory standards and are aligned with industry best practices. B-VAULT fire and emergency protection systems, which include fire and smoke detection, gas sensors, and ventilation, are designed to manage the system in a timely manner in order to reduce the risk of fire or explosion by eliminating single point of failure.

“Our objective at Energy Vault is to provide customers with a comprehensive portfolio of energy storage solutions that are safe, reliable and cost-effective, and DNV’s independent and thorough due diligence assessment means that customers and lenders can confidently rely upon Energy Vault’s battery energy storage systems to meet their specific grid storage needs,” said Marco Terruzzin, Chief Commercial and Product Officer, Energy Vault. “This assessment not only serves as a key validation of the excellence of Energy Vault’s BESS solutions, but affirms the company’s role as the leading energy storage solutions provider enabling the transition to a renewable world.”

“Reliability, safety, and performance are of the highest priority for Energy Vault when designing energy storage solutions that are tailored to site-specific requirements,” said Akshay Ladwa, Chief Engineering Officer of Energy Vault Solutions. “DNV’s Bankability Report provides the critical diligence that customers and lenders need when considering energy storage solutions, and we’re proud that this report confirms that Energy Vault’s battery energy storage solutions can be depended upon.”

Engineered to meet short duration energy storage needs, B-VAULT is a suite of fully integrated BESS designed for reliability, flexibility and availability. Innovative enclosure architecture provides customer optionality with both battery and inverter suppliers, while unique AC-coupled and DC-coupled configurations provide the drop-in flexibility needed for any project. Advanced safety and cybersecurity features combine with native energy management system (VaultOS™) integration and competitive project pricing to deliver on customer needs. Energy Vault has B-VAULT systems contracted/under construction across the United States, Europe and Australia.

About Energy Vault

Energy Vault® develops and deploys utility-scale energy storage solutions designed to transform the world's approach to sustainable energy storage. The Company's comprehensive offerings include proprietary gravity-based storage, battery storage, and green hydrogen energy storage technologies. Each storage solution is supported by the Company’s hardware technology-agnostic energy management system software and integration platform. Unique to the industry, Energy Vault’s innovative technology portfolio delivers customized short-and-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. Utilizing eco-friendly materials with the ability to integrate waste materials for beneficial reuse, Energy Vault’s EVx™ gravity-based energy storage technology is facilitating the shift to a circular economy while accelerating the global clean energy transition for its customers. Please visit www.energyvault.com for more information.

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