Iberdrola Renewables and Salt River Project (SRP) have signed a 25-year power purchase agreement (PPA) for the solar energy produced at the Copper Crossing Solar Ranch in Pinal County, Arizona.

The solar power will be produced using photovoltaic panels and the facility will produce enough energy for about 3,100 homes.

SRP will purchase all of the energy produced at the plant, which is expected to start production by June 2011.

SRP has purchased property located between Quail Run Lane and Attaway Road, and between Judd Road and Bella Vista Road, and will lease a portion of the property for the development of the Copper Crossing solar facility.

SRP is a US based power utility and serves more than 930,000 electric customers through a variety of resources including solar, wind, biomass, geothermal and hydroelectricity.