Energy Vault awarded project by Michigan’s largest energy provider to supply two battery energy storage systems (BESS), totaling 75 MW/300 MWh, in Iosco and Bay Counties
Battery deliveries expected to commence in Q4 2025, enabling construction to begin in Q1 2026, with commercial operation expected by Q4 2026
Commercial agreement executed earlier this year marks Energy Vault’s expansion into the Eastern U.S. utility market through a partnership with a leading Midwest public utility.
Energy Vault (NYSE: NRGV) (“Energy Vault” or the “Company”), a global leader in sustainable energy storage solutions, today announced an agreement with Consumers Energy, Michigan’s largest energy provider, for the supply of two battery energy storage systems (BESS), totaling 75 MW/300 MWh. The BESS deployments will be located in Iosco and Bay Counties, with battery deliveries expected to commence in Q4 2025, construction expected to begin in Q1 2026 and commercial operation expected by Q4 2026.
The 45 MW/180 MWh Weadock BESS will be located at the site of the now-retired John C. Weadock Power Plant in Hampton Township, while the 30 MW/120 MWh Iosco County BESS will be located in Oscoda Township. Local permitting efforts are actively underway in coordination with township officials to support project development.Both BESS deployments will be charged and discharged on a daily basis and designed to dispatch stored renewable energy at peak consumption hours to help meet Michigan’s energy demand.
“As the energy transition accelerates, utilities like Consumers Energy are stepping up to ensure grid reliability while integrating more renewable energy. We are proud to partner with Michigan’s largest energy provider on these critical projects, which will not only help meet peak demand with energy but also exemplify how advanced storage technologies can support grid resilience at scale,” said Marco Terruzzin Chief Revenue Officer, Energy Vault. “This contract marks Energy Vault’s continued expansion across the US with a leading Midwest utility partner committed to delivering sustainable energy at scale—and it lays the foundation for a long-term strategic partnership focused on enabling a more resilient and sustainable energy future for Michigan and beyond.”
“Battery storage will continue to play a larger role as Consumers Energy meets Michigan’s growing energy needs. We’re excited to collaborate with Energy Vault to bring these two projects to life in the communities we serve,” said Sri Maddipati, Consumers Energy’s president of electric supply.
The BESS deployments will be developed under Energy Vault’s B-VAULT™ suite of fully integrated battery energy storage solutions, and will leverage Energy Vault’s proprietary X-Vault integration platform and Vault-OS Energy Management System to control, manage and optimize the BESS operations, allowing for superior energy management capabilities. Energy Vault’s innovative system 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.
Today’s announcement marks an advancement of Energy Vault’s growing commercial footprint in the global battery energy storage market, with the Company’s B-VAULT portfolio consisting of more than 2GWh in total projects either deployed or currently in development to date.
