Sulphur Springs Valley Electric Cooperative (SSVEC) and SunPower (Nasdaq: SPWR) announced today that SSVEC has signed a 20-year power purchase agreement (PPA) with SunPower to build a 20-megawatt (AC) solar photovoltaic (PV) power plant in Cochise County, Ariz. Expected to be operational by the end of 2016, the plant is anticipated to generate enough electricity to serve the needs of approximately 4,500 homes, based on estimates provided by the Solar Energy Industries Association.