American Solar Energy Society – Nation’s leading association of solar professionals & grassroots advocates.

EERE Solar Energy Technologies Program – Division of U.S. Department of Energy, works with industry participants, universities, federal and state government, and other non-governmental agencies to develop economically competitive photovoltaic materials.

Solar Electric Power Association – Formed in 1992 as the Utility Photovoltaic Group, SEPA has more than 500 utility, electric service provider, manufacturer, installer, government, and research members.

Solar Energy Industries Association (SEIA) – Trade association provides news, statistics, and links to related products and companies.

*For more information, see Articles, Books, and Industry Overviews, in this guide.  Search Terms: photovoltaic, solar cells, solar energy, solar power.