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Rosendin Rosendin

Riverside County, CA

Athos I & II

Project Summary

Rosendin was contracted by subsidiaries of SB Energy US Holdings One, Inc. (SB Energy), a renewable energy corporation and a subsidiary of SoftBank Group Corp, to design and build the $750 million project, which will cover nearly 5-square miles in Riverside County.

Once completed, the combined 641MWdc/450MWac Athos I and Athos II solar installations will provide the capacity to generate over 2,200 GWh per year of renewable energy, enough to power 179,000 homes and offset 1.7 million tons of carbon dioxide emissions annually.

  • Athos I will have the capacity to generate up to 357-Megawatts (DC) as early as March 2022.
  • Athos II will have a 284-Megawatt (DC) capacity when completed around November 2021.

Athos is one of the largest renewable energy projects in California, incorporating 1.48 million First Solar Series 6™ photovoltaic (PV) modules on a 3,440-acre* land parcel, located approximately 75 miles east of Palm Desert in a small town called Desert Center.

Rosendin will utilize over 400 employees and union contractors with the International Brotherhood of Electrical Workers (IBEW) to construct the project, following all COVID-19 safety protocols.

Value Add

Athos I & II

Design-build solar installations totaling 450MWac

Riverside County, CA
SB Energy US Holdings One, Inc.
27 Months
$750 Million

Project Facts






Million First Solar Series 6™ PV modules

January 29, 2023 | Articles

Athos III Solar + Storage Project

The Athos III Solar + Storage Project, also known as Blythe Mesa Solar II, is an operational renewable project located in the US state of California.

NS Energy News
November 18, 2021 | Articles

Palm Springs, Calif., Solar Farm Overcomes Permit, Pandemic Hurdles

When completed, the solar field will generate enough electricity to power more than 179,000 homes

ENR California

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