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Energy Storage Developer Acquires Texas BESS Project From Subsidiary of Shell

October 23, 2025

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Copyright 2025 EnergyChoiceMatters.com
Reporting by Paul Ring • ring@energychoicematters.com

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Energy Vault Holdings, Inc. ("Energy Vault" or the "Company") announced its acquisition and planned development of SOSA Energy Center, a 150 MW/300 MWh battery energy storage system (BESS) located in Madison County, Texas.

The project, originally developed by Savion, a subsidiary of Shell plc, "represents a significant advancement in Energy Vault’s growing U.S. portfolio and marks the first project to be formally acquired through its Asset Vault investment platform," Energy Vault said

The 150 MW/300 MWh BESS is positioned within the ERCOT North market.

Energy Vault said that it is in "advanced negotiations" with a counterparty for an 8-year offtake agreement.

"The offtake structure is expected to be underwritten by an investment-grade counterparty, and is expected to deliver bankable, frontloaded revenue streams, enhancing returns and de-risking project cash flows," Energy Vault said

The project is expected to receive Notice to Proceed (NTP) in Q4 2025, with commercial operation expected in Q1 2027.

"As the first project to be formally acquired under Energy Vault’s Asset Vault investment platform, the SOSA BESS acquisition will be supported by the recently announced $300 million preferred equity investment by Orion Infrastructure Capital (OIC), in addition to the monetization of Federal Investment Tax Credit-related funds. Asset Vault is a fully consolidated subsidiary of Energy Vault, dedicated to developing, building, owning and operating energy storage assets globally," Energy Vault said

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