NRG Solar and SunPower Agree to Build 250-Megawatt California Valley Solar Ranch

November 30, 2010

- Construction Planned to Begin in 2011 - PRINCETON, N.J. and SAN JOSE, Calif., Nov. 30, 2010 /PRNewswire/ -- NRG Solar, a subsidiary of NRG Energy, Inc. (NYSE: NRG) and SunPower Corp. (Nasdaq: SPWRA, SPWRB) today announced groundbreaking agreements to begin construction next year of the 250-megawatt (MW) California Valley Solar Ranch in San Luis Obispo County. The solar power plant is expected to create approximately 350 jobs during construction, will power about 100,000 homes and will be one of the largest photovoltaic solar power plants in the world, when complete. NRG Solar plans to invest up to $450 million of equity in the project over the next four years, subject to final total project cost and negotiation of the financing terms and conditions. Under the agreement announced today, NRG will, subject to certain conditions, assume all ownership and financing responsibilities for the California Valley Solar Ranch. SunPower will continue to develop the project, and will design, build, operate and maintain the solar power plant. Construction is expected to start in the second half of 2011, with a portion of the project expected to begin operating by the end of 2011 and the balance coming on line in 2012 and 2013. When fully operational, the solar power plant will help California achieve its 33% renewable portfolio standard. The project is currently seeking a loan guarantee from the U.S. Department of Energy's (DOE) Loan Guarantee Program Office, which supports accelerated commercial use of innovative energy technologies to help sustain economic growth, yield environmental benefits, and produce a more stable and secure energy supply. The DOE Loan Guarantee Program Office has provided a draft term sheet for the California Valley Solar Ranch project, which is a significant milestone in the process leading to a conditional loan guarantee commitment.

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