Keywords: Photovolaic array on top of the James Forrestal Building - US Dept of Energy - 2008.jpg en Photovoltaic array on top of the North Building of the United States Department of Energy in 2008 An executive order issued in 2009 requires all U S government agencies to reduce power consumption by 30 percent and to obtain 20 percent of power needs from renewable sources The solar energy array provides about 8 percent of the building's energy needs https //sam nrel gov/files/content/documents/pdf/DOE 20Forrestal 20Building 20Rooftop 20PV pdf ; page 1 National Renewable Energy Laboratory U S Department of Energy 2008 James V Forrestal Building PD-USGov |