Reference / Research NREL -- National Renewable Energy Laboratory -- http://www.nrel.gov The U.S. Department of Energy's premier laboratory for renewable energy research & development and a lead lab for energy efficiency R&D IREC -- Interstate Renewable Energy Council -- http://www.irecusa.org The Interstate Renewable Energy Council's mission is to accelerate the sustainable utilization of renewable energy sources and technologies in and through state and local government and community activities. EERE - Office of Energy Efficiency and Renewable Energy - http://www.eren.doe.gov This is the official Web site of the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE). This site serves a dual purpose, directing you to detailed information about EERE, its programs, and the technologies that it is developing, while also providing a portal to worldwide information about energy efficiency and renewable energy. SEPA -- Solar Electric Power Association -- http://www.solarelectricpower.org The Solar Electric Power Association (SEPA) is a collaboration of utilities, energy service providers and the photovoltaic industry working together to create and encourage commercial use of new solar electric power business models.