Solar & Alternative Energy Products Trade Associations

Advanced Energy United (AEU)

U.S. trade association representing companies across advanced energy (solar, wind, storage, grid tech, EVs, efficiency) focused on policy to expand clean energy markets; reported 76+ member companies in 2025.

https://advancedenergyunited.org/ Membership: 76

American Biogas Council (ABC)

National trade group for the U.S. biogas/RNG industry advocating policy, market development, and best practices; represents 400+ companies and 6,000 professionals across the supply chain.

https://americanbiogascouncil.org/ Membership: 400

American Clean Power Association (ACP)

Pan‑renewables association uniting utility‑scale solar, wind, storage, transmission and clean hydrogen stakeholders to advance U.S. clean power; represents 700+ companies.

https://cleanpower.org/ Membership: 700

American Solar Energy Society (ASES)

Nonprofit membership society advancing solar and renewable energy through research, education, and advocacy; approx. 20,000 members across chapters and student groups (2023).

https://www.ases.org/ Membership: 20,000

Biomass Power Association (BPA)

U.S. organization for utility‑scale biomass power producers and suppliers; member companies collectively represent ~1,100 MW of capacity; 41 member companies listed.

https://biomasspowerassociation.org/ Membership: 41

California Solar & Storage Association (CALSSA)

California’s largest clean‑energy business group for rooftop solar and storage companies; over 700 member firms spanning design, installation, manufacturing, financing and services.

https://calssa.org/ Membership: 700

Clean Energy Buyers Association (CEBA)

Association for large energy buyers, providers and partners working to procure clean energy; membership exceeds 420 organizations across C&I, nonprofit, provider and service segments.

https://cebuyers.org/ Membership: 420

Coalition for Renewable Natural Gas (RNG Coalition)

North American trade association for the renewable natural gas industry, advocating policy and market growth; represents 400+ member organizations across the RNG value chain.

https://www.rngcoalition.com/ Membership: 400

Fuel Cell & Hydrogen Energy Association (FCHEA)

U.S. industry association for hydrogen and fuel cell technologies, leading advocacy, codes/standards and education; represents 100+ organizations across the global supply chain.

https://www.fchea.org/ Membership: 100

Geothermal Rising

The primary professional association for the geothermal sector, providing conferences, library access, and outreach; membership reported at 1,176 (2017) and growing.

https://geothermal.org/ Membership: 1,176

International Geothermal Association (IGA)

Global nonprofit representing the geothermal sector worldwide, advocating deployment and policy; membership is around 10,000 across 88+ countries.

https://www.lovegeothermal.org/ Membership: 10,000

International Ground Source Heat Pump Association (IGSHPA)

Member‑driven organization advancing ground‑source (geothermal) heat pump technology via training, standards and advocacy; 800+ members.

https://igshpa.org/ Membership: 800

International Solar Energy Society (ISES)

UN‑accredited nonprofit solar society with members in 110+ countries; includes nearly 100 corporate/institutional members and a large global individual membership base.

https://www.ises.org/ Membership: 100

Long Duration Energy Storage (LDES) Council

Global nonprofit industry council accelerating long‑duration energy storage adoption; over 60 members across 20+ countries from technology providers to utilities.

https://ldescouncil.com/ Membership: 60

Midwest Renewable Energy Association (MREA)

Midwestern nonprofit advancing clean energy through workforce training, group buys, and education; supported by a community of 1,000+ members.

https://www.midwestrenew.org/ Membership: 1,000

National Hydropower Association (NHA)

U.S. trade association for hydropower and marine energy technologies, advocating policy and market development; represents 300+ organizations across the waterpower value chain.

https://www.hydro.org/ Membership: 300

New England Clean Energy Council (NECEC)

Regional trade group driving the Northeast clean‑energy economy through policy, innovation, and market development; represents close to 400 member and affiliate organizations.

https://www.cleanenergycouncil.org/ Membership: 400

New York Geothermal Energy Organization (NY‑GEO)

State trade association for geothermal heat pumps in New York, promoting adoption and workforce development; reports 263 member organizations and 683 individuals.

https://www.ny-geo.org/ Membership: 263

Smart Electric Power Alliance (SEPA)

National nonprofit of utilities, regulators, and solution providers collaborating to decarbonize the grid; 1,000+ organizational members.

https://sepapower.org/ Membership: 1,000

Solar Energy Industries Association (SEIA)

U.S. national trade association for the solar and solar+storage industries, leading advocacy, research, and market development; works with roughly 1,000 member companies.

https://www.seia.org/ Membership: 1,000