ORGANIZATION AND DESCRIPTION OF BUSINESS	6 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION AND DESCRIPTION OF BUSINESS	ORGANIZATION AND DESCRIPTION OF BUSINESS Energy Vault Holdings, Inc., which together with its subsidiaries is referred to herein as “Energy Vault” or the “Company,” is an integrated global energy infrastructure platform that builds, owns and operates flexible, reliable energy systems designed to accelerate time-to-power for utilities, independent power producers, industrial customers and the artificial intelligence and data center market. At the core of our platform is a technology-agnostic, software-enabled architecture that is designed to accelerate project delivery, optimize performance and drive faster time-to-revenue. Energy Vault’s integrated solutions combine energy storage, generation, and advanced energy management to deliver scalable infrastructure tailored to customer needs. Our portfolio spans short-, long-, and multi-day duration storage, engineered to enable reliability, flexibility and cost efficiency across applications. Through this integrated model, we offer utilities, independent power producers, and large energy users solutions that may include standalone energy storage, integrated generation and storage configurations, and related power infrastructure. We manage projects across the lifecycle, from sourcing and development through permitting and interconnection, engineering and construction management, commissioning, and operations, and we provide software-enabled monitoring, controls, and services intended to support asset availability, operational efficiency, and lifecycle performance.

ORGANIZATION AND DESCRIPTION OF BUSINESS

6 Months Ended

Jun. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

ORGANIZATION AND DESCRIPTION OF BUSINESS

Energy Vault Holdings, Inc., which together with its subsidiaries is referred to herein as “Energy Vault” or the “Company,” is an integrated global energy infrastructure platform that builds, owns and operates flexible, reliable energy systems designed to accelerate time-to-power for utilities, independent power producers, industrial customers and the artificial intelligence and data center market. At the core of our platform is a technology-agnostic, software-enabled architecture that is designed to accelerate project delivery, optimize performance and drive faster time-to-revenue. Energy Vault’s integrated solutions combine energy storage, generation, and advanced energy management to deliver scalable infrastructure tailored to customer needs. Our portfolio spans short-, long-, and multi-day duration storage, engineered to enable reliability, flexibility and cost efficiency across applications.

Through this integrated model, we offer utilities, independent power producers, and large energy users solutions that may include standalone energy storage, integrated generation and storage configurations, and related power infrastructure. We manage projects across the lifecycle, from sourcing and development through permitting and interconnection, engineering and construction management, commissioning, and operations, and we provide software-enabled monitoring, controls, and services intended to support asset availability, operational efficiency, and lifecycle performance.