Energy Vault has commenced construction of the SOSA Energy Center, a 150MW/300 megawatt-hour battery energy storage project in Madison County, Texas, US.
The battery energy storage system (BESS), developed for the ERCOT North market, is expected to enter commercial operation by the second quarter of 2027 (Q2 2027).
Go deeper with GlobalData
Discover B2B Marketing That Performs
Combine business intelligence and editorial excellence to reach engaged professionals across 36 leading media platforms.
Energy Vault, an energy storage company, acquired the asset from Savion, a subsidiary of Shell, in Q4 2025 under its Asset Vault platform.
Energy Vault chairman and CEO Robert Piconi said: “Breaking ground on the SOSA Energy Center so quickly after acquisition demonstrates the velocity with which we are executing and growing Energy Vault’s Asset Vault platform and underscores our strategic commitment to the Texas ERCOT market, one of the most dynamic energy markets in the US.”
The SOSA Energy Center is the first site to begin on-site construction through Asset Vault, Energy Vault’s wholly owned subsidiary focused on developing, owning and operating energy storage assets.
Orion Infrastructure Capital provided a $300m preferred equity investment in support of Asset Vault’s activities.
US Tariffs are shifting - will you react or anticipate?
Don’t let policy changes catch you off guard. Stay proactive with real-time data and expert analysis.
By GlobalDataAccording to Energy Vault, the SOSA Energy Center benefits from completed environmental and interconnection milestones, full site control and a clear title.
Upon completion, Energy Vault intends for the facility to supply grid support and renewable integration services to the Texas energy system.
The company is engaged in advanced talks over a six to eight-year offtake agreement with an investment-grade counterparty.
Over its technical life, the SOSA Energy Center is forecasted to generate more than $350m in total revenue and approximately $17m–$20m per year from recurring contracted cash flows.
Energy Vault will manage engineering, procurement and construction activities internally and maintain long-term service agreements for the BESS.
This vertically integrated structure enables direct control over operations and ongoing revenue optimisation throughout the asset’s life cycle, said the company.
The start of construction at SOSA brings Energy Vault’s total portfolio under operation or construction to more than 340MW. This includes three additional projects that began off-site work in late 2025 and are due to come online between late 2027 and late 2028.
Across its portfolio, Energy Vault applies its proprietary B-VAULT battery energy storage technology to achieve expedited deployment times and high availability levels.
The company’s broader B-VAULT installations now exceed two gigawatt-hours globally across deployed or contracted systems.
