Eolus, a renewable energy project developer, signed and closed the sale of the 127 MW/506 MWh Roccasecca stand-alone battery energy storage project located in Boulder City, Nevada.
The transaction was completed as an all-cash sale to a large U.S. independent power producer with more than 12 GW of aggregate capacity. The transaction also covers the transfer of all shares of the Roccasecca SPV to the acquirer and a total cash payment, including cost reimbursement, of approximately $66.9 million to Eolus.
Construction of the project began in the fourth quarter of last year and is expected to start commercial operation in 2026.
This transaction marks Eolus’s fifth project sale in the U.S. market. According to the agreement, the buyer assumes all rights and obligations associated with the project, including a 15-year tolling agreement, equipment supply agreements, and project finance agreements negotiated and executed by Eolus. The buyer will be responsible for construction management and will continue the buildout until completion, with Eolus supporting as required.
“We continue to generate healthy returns from a pipeline of renewable energy and battery projects, built up over more than ten years of presence in the U.S. market. We timed this deal flawlessly, handing over a derisked project, complete with contracted revenues, construction to term financing, and a sensible allocation of construction risk. Roccasecca shows how we leverage our experience to structure transactions for optimal value creation. I look forward to reinvesting our Roccasecca proceeds into new value-creating opportunities in the Eolus pipeline”, adds Per Witalisson, CEO of Eolus.
Previously, in 2022, Eolus signed an agreement to sell a 750 MW solar and battery storage project in Arizona, US. The project is Eolus’ third to be sold in the U.S.
According to Mercom’s Annual and Q4 2025 Funding and M&A Report for Energy Storage report, there were 65 energy storage project M&A transactions in 2025 compared to 38 transactions in the same period of 2024.
