Arevon, Banpu Power (BPP) and Energy Vault have made BESS project announcements totalling 1,550MWh of capacity in California and Texas, the biggest US states for energy storage deployment.
The trio of announcements come as the Energy Storage Summit 2026 kicked off in Dallas, Texas today, running over the next two days (24-25 March).
Arevon building 1GWh California project
Arevon Energy has started building its 250MW/1,000MWh Cormorant battery energy storage system (BESS) project in Daly City, California. It will come online in 2027, requires investment of US$600 million and has a long-term offtake with utility MCE.
It was initially planned at 188MW/752MWh but was later expanded. Primoris Services Corporation’s Renewables group is providing engineering, procurement and construction (EPC) services.
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Arevon has progressed numerous BESS projects to construction in the last 12 months; see our coverage of those here.
California is the US’ largest market for BESS deployments; see more news from the state here.
Banpu Power and Energy Vault buy in Texas
Thailand-based power firm Banpu Power (BPP) has acquired the Megamouth BESS project in the ERCOT, Texas, market. The 100MW/200MWh project in Houston needs US$90 million of investment to be completed for a commercial operation date in Q4 2027.
It benefits from a 40% investment tax credit (ITC), which was maintained by the Trump administration amidst a phase-out of tax credits for wind and solar. The Megamouth project seller was developer Grid Connected Infrastructure.
In similar news, Energy Vault has acquired a 175MW/350MWh BESS in Texas, called McMurtre, from developer Belltown Power. The project still needs to reach ready-to-build (RTB) stage, and is expected to do so in Q4 2026, for commercial operation in December 2027.
It has a Small Generator Interconnection Agreement (SGIA) and full site control, providing a clear and de-risked path to construction, Energy Vault said. The firm is considering multiple ‘investment-grade’ offtakers for its capacity.
The company, which initially started out as a gravity energy storage tech firm but has transitioned into both BESS and green hydrogen and BESS owner-operation, released its full-year results recently.
