US renewable energy developer DESRI and investment platform Tierra Adentro Growth Capital (TAGC) have announced the commencement of construction works for two co-located solar and energy storage projects in San Juan County, New Mexico, United States (DESRI press release, 26/05/2026).
The Foxtail Flats Solar and Storage project consists of a 170 MW solar facility combined with an 80 MW/320 MWh battery energy storage system. The project is supported by a long-term power purchase agreement signed with the Incorporated County of Los Alamos. Meanwhile, the Four Mile Mesa Solar and Storage project includes a 100 MW solar installation paired with a 100 MW/400 MWh battery storage system to support Meta’s data center operations.
Combined, the two projects will provide 270 MW of solar generation capacity and 180 MW/720 MWh of battery energy storage. They will be developed on land owned by the Ute Mountain Ute, adjacent to DESRI’s operational San Juan Solar and Storage facility and the retired San Juan Generating Station. Commercial operations for both projects are scheduled to begin in 2027.
SOLV Energy has been selected as the engineering, procurement, and construction (EPC) contractor for both the solar and battery storage facilities.
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