This photograph features one of many SunPower T20 Tracker that are part of the 14.2-megawatt photovoltaic (PV) systems installed at Nellis Air Force Base in Nevada, which was the largest PV system in North America at the time. Nellis purchases the electricity from SunPower Corporation using a FAR 41 (Acquisition of Utility Services) utility contract with an indefinite term and a 12-month termination provision. SunPower Corporation was granted access to the land through a 20-year ground lease, in conjunction with an operating agreement with security and other site access provisions. The leasing authority is 10 USC 2667. The groundbreaking ceremony was held on April 23, 2007. The PV project will supply over 25 percent of Nellis' electricity requirements and will save approximately $1 million per year, even after accounting for standby charges. The renewable energy certificates (RECs) are being sold to Nevada Power for the state renewable portfolio standard solar set-aside requirement.