Established in 1954, the American Solar Energy Society (ASES) is the nonprofit organization dedicated to increasing the use of solar energy, energy efficiency, and other sustainable technologies in the U.S. - (Read more)

The Solar Electric Power Association is a nonprofit organization, formed in 1992 as the Utility Photovoltaic Group. From national events to one-on-one assistance, SEPA is the go-to resource for unbiased and actionable solar intelligence. SEPA is comprised of 375 utility and solar industry members. Breaking down information overload into business reality, SEPA takes the time and risk out of implementing solar business plans and helps turn new technologies into new opportunities. - (Read more)

REPP's goal is to accelerate the use of renewable energy by providing credible information, insightful policy analysis, and innovative strategies amid changing energy markets and mounting environmental needs by researching, publishing, and disseminating information, creating policy tools, and hosting highly active, on-line, renewable energy discussion groups. - (Read more)

The Solar Energy Industries Association (SEIA) is the leading national trade association for the solar energy industry. We work to expand markets, strengthen research and development, remove market barriers and improve education and outreach for solar energy professionals. Located in Washington, D.C., SEIA was founded in 1974. - (Read more)