Imperial Valley’s Mount Signal 3 Solar Farm Reaches Commercial Ops


8minutenergy Renewables LLC and Capital Dynamics have celebrated the completion and commercial operation of the 328 MW Mount Signal 3 Solar Farm in Southern California.

Located in the city of Calexico in the Imperial Valley, the project is the largest in the 800 MW Mount Signal solar cluster. Mount Signal 3, acquired by Capital Dynamics’ clean energy infrastructure (CEI) business in 2017, commenced construction earlier this year and is being brought to commercial operation ahead of schedule.

8minutenergy was the original developer of all three solar farms in the Mount Signal cluster. With Mount Signal 1 and Mount Signal 3 both now complete, the cluster has approximately 80% of its total final capacity online. Mount Signal 1 and 3 will generate a combined 1.29 billion kWh of renewable power annually for the residents of 15 Southern California counties. Southern California Edison and 8minutenergy signed a long-term power purchase agreement for Mount Signal 3’s energy in 2014.

“This is a big day for California and the entire solar industry. As the original developer of the Mount Signal solar cluster, 8minutenergy is incredibly proud to bring this phase of the largest solar plant in the state to completion,” remarks Tom Buttgenbach, CEO and president of 8minutenergy. “Mount Signal is a clear demonstration that solar is ready to power California’s 100 percent clean energy future ahead of schedule. The Imperial County board of supervisors, their staff, our dedicated partners and the outstanding local workforce were all critical in ensuring that we beat our aggressive timeline in bringing Mount Signal 3 to completion. I’d also like to thank Capital Dynamics and Southern California Edison for being tremendous partners on this project.”

Mortenson Construction provided the engineering, procurement and construction contracting for the Mount Signal 3 plant. Key suppliers included First Solar, with 2.8 million Series 4 thin-film solar panels; NEXTracker, with its NX Horizon smart solar tracker; and TMEIC, with 96 Solar Ware Samurai 2700 Central inverters.

“Capital Dynamics is proud to have the development of Mount Signal 3 completed and now providing hundreds of millions of clean kilowatt-hours to the grid. Large-scale solar delivers what California needs – massive amounts of clean energy, reliably and at a low cost,” says John Breckenridge, head of Capital Dynamics’ CEI team.

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