090613-N-7436D-001 NAVAL BASE CORONADO, Calif. (June 13, 2009) Photovoltaic systems at Naval Base Coronado generate 4,112 kilowatt-hours of electricity per day, or more than 1.5 million kwh per year. Photovoltaic systems save the Navy $187,000 annually and reduce the total energy the Navy has to purchase. (U.S. Navy photo/Released)