Energy Vault has taken another bold leap in the global energy storage race with the acquisition of the 150 MW/300 MWh SOSA Battery Energy Storage System (BESS) project in Madison County, Texas. Marking the first formal acquisition under its Asset Vault platform, this move cements Energy Vault’s commitment to owning and operating next-generation storage assets that drive energy resilience and profitability across key markets.

The acquisition of SOSA BESS represents a major milestone for Asset Vault, Energy Vault’s fully consolidated subsidiary dedicated to developing, owning, and operating storage assets worldwide. This deal boosts Asset Vault’s total operational capacity to around 340 MW across the United States and Australia, with an impressive 3.5 GW pipeline under active development. Though the financial terms remain undisclosed, the transaction underscores Energy Vault’s strategy of scaling rapidly through high-value acquisitions. It also demonstrates the growing investor confidence in energy storage infrastructure, an increasingly vital component of the clean energy ecosystem.

Originally developed by Savion, a subsidiary of Shell plc, the SOSA BESS project is now at a ready-to-build stage, having achieved key milestones including site control, environmental clearances, and interconnection approvals. The facility will deploy Energy Vault’s third-generation B-VAULT AC technology, known for its cost efficiency and high system reliability. Construction is scheduled to begin in Q4 2025, with commercial operations expected in Q1 2027. Once online, the project is forecasted to generate $17–20 million in annual revenue over a 10–15 year period — translating to nearly $250 million in predictable, high-margin returns. Energy Vault is already in advanced negotiations for an 8-year power offtake agreement with an investment-grade counterparty, adding stability and bankability to the project’s long-term outlook.

The SOSA BESS acquisition is being fueled by a $300 million preferred equity investment from Orion Infrastructure Capital, alongside the monetization of Federal Investment Tax Credit (ITC) funds. This strategic financing structure enables Energy Vault to rapidly deploy capital toward scalable, high-return storage assets that underpin the global renewable transition. As part of its expansion roadmap, the company is aggressively growing its owned-and-operated portfolio across the US and international markets, positioning itself as a leader in utility-scale storage solutions.

Energy Vault’s acquisition of the SOSA BESS project marks a defining moment in its evolution from a technology provider to a vertically integrated energy infrastructure powerhouse. With cutting-edge technology, strategic financing, and a robust pipeline, the company is poised to redefine how large-scale energy storage assets are developed and monetized worldwide.

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