San Luis Valley Solar Ranch

The electricity is being sold to Public Service of Colorado, a subsidiary of Xcel Energy, under a 20-year power purchase agreement.

[1] The facility occupies about 220 acres of a 320-acre plot of previous agricultural farmland, and is the third utility-scale solar project to be completed in the sunny and cool San Luis Valley.

The plant consists of about 110,000 SunPower E19-series panels (each rated about 320 Wp and 19% efficiency) that are mounted on single-axis trackers.

[5] Work at the project site began in November 2010, and included a new 150 kV transmission line to the San Luis Valley Rural Electrical Cooperative's substation.

First electricity was delivered to the grid in December 2011, and the start of commercial operations was commissioned in March 2012.

A map of solar farms in the San Luis valley