Arevon Advances 250MW/1000MWh Energy Storage Project in California

en.Wedoany.com Reported - On September 16, U.S. energy developer Arevon Energy announced phased progress in construction of its Cormorant battery energy storage project in Daly City, California. The project has a capacity of 250MW/1000MWh, represents a total investment of approximately US$600 million, adopts lithium iron phosphate battery technology, is designed for a 4-hour continuous discharge duration, and is scheduled to enter operation in 2027. Arevon is responsible for project development and will own and operate the asset after it is placed in service.

The Cormorant project officially began construction in March 2026. Construction is currently being carried out by the Renewables business unit of Primoris Services Corporation, which is responsible for engineering, procurement, and construction, with approximately 175 workers expected at peak construction. Once operational, the project will charge during low-load periods and discharge during peak demand periods through the energy storage system.

The project was initially planned at 188MW/752MWh and was subsequently expanded to 250MW/1000MWh, with the additional capacity also included under a long-term offtake agreement signed with U.S. community power supplier MCE. MCE's service area covers Contra Costa, Marin, Napa, and Solano counties, and it currently serves more than 1.8 million residents and businesses.

The project site is located near Geneva Avenue and Carter Street in Daly City, covers approximately 7.6 acres, and includes approximately 6.9 acres of battery energy storage facilities, approximately 0.71 acres of substation, and up to approximately 1.2 miles of underground 115kV transmission line, which will connect to Pacific Gas and Electric Company's (PG&E) Martin substation. The Daly City municipal government approved the project's relevant environmental documents and development conditions on February 24, 2025.

According to the technical plan disclosed by Arevon, the Cormorant project uses a lithium iron phosphate energy storage system. Once operational, the 250MW system can discharge continuously for 4 hours, corresponding to 1000MWh of energy storage capacity. The project is still in the construction phase, and the next substantive milestones are equipment installation, system commissioning, and commercial operation in 2027.