February 28, 2012 (San Diego)-- San Diego leads the nation in rooftop and on-site solar installations.  According to a recent report from e Environment California Research & Policy Center, over 4,500 installations and 37 MW peak capacity for the city--15,700 installations—have been made within San Diego Gas & Electric’s service territory.  Now the Solar Electric Power Association (SEPA), CleanTECH San Diego and San Diego Gas & Electric (SDG&E) are offering a solar energy symposium on March 6 at the University of San Diego to discuss the future of solar energy in the region.