Founded in November 2001, the American Council On Renewable Energy (ACORE) works to bring all forms of renewable energy into the mainstream of America's economy and lifestyle.

The American Solar Energy Society (ASES) is a national membership organization whose mission is to attain a sustainable U.S. energy economy. ASES strives to accelerate the development and use of solar and other renewable energy resources through advocacy, education, research and collaboration among professionals, policy-makers and the public.

The Clean Energy Partnership (CEP) is a 501 c(6) non-profit, non-partisan group founded in 2004. The Clean Energy Partnership is the first and only group in the Maryland, DC, and Virginia area that is organizing businesses to support practical solutions to today's most pressing environmental challenges -global warming and air pollution.

MDV-SEIA works to empower regional residents to harness the energy of the sun. By bridging the information gap between citizens, industry, and elected officials, MDV-SEIA greases the wheels for adoption of clean solar energy technologies that will lead to cleaner air, a more reliable energy supply, and predictable energy bills. Beyond the direct benefits to the environment and to users of clean energy, the Association works to foster good local jobs, informed and empowered citizens, and a sustainable future for the Mid-Atlantic region.

The Northern California Solar Energy Association (NorCal Solar) is a non-profit educational organization whose mission is to accelerate the use of solar energy technology through the exchange of information. Since 1975 this membership-based group has educated tens of thousands of Californians about solar energy solutions through our events, publications, information center, website, and advocacy programs. As a crucial part of the global warming solution, NorCal Solar envisions an educated and empowered population that uses all forms of solar energy technology and practices for an economically viable, secure, and environmentally sustainable world.

The Solar Electric Power Association is a nonprofit organization with 175 utility, electric service provider, manufacturer, installer, government, and research members. SEPAs mission is to facilitate the use and integration of solar electric power by utilities, electric service providers, and their customers.

The Solar Energy Industries Association (SEIA) is the national trade association of solar energy manufacturers, dealers, distributors, contractors, installers, architects, consultants, and marketers. We work to expand the use of solar technologies in the global marketplace.

TREIA represents over 200 member companies, organizations, agencies and individuals providing products, services and information in the areas of solar electric generation, solar hot water, large and small-scale wind electric generation, biomass electric generation and liquid renewable fuels, geothermal heating and cooling, geothermal electric generation, and sustainable (green) building design and construction.