Alternative Power Distribution , representing Beijing Sunda Solar Energy Technology Co., Ltd.: a world-wide leading manufacturer of evacuated tube solar collectors.

American Solar Energy Society , established in 1954, is the nation's leading association of solar professionals & grassroots advocates.

COSEIA Colorado Solar Energy Industry Association. Established in 1989, CoSEIA is the nonprofit association leading Colorado's solar industry. Our mission is to expand the use of solar technologies across Colorado. CoSEIA advances solar policy, removes market barriers, highlights emerging trends, and improves education and outreach .

Find Solar - "Connecting you to solar professionals", and solar calculators that assist you in determining your energy requirements.

Gaia-Wind - The world's leading high performance, small wind turbine manufacturer.

NREL is the National Renewable Energy Laboratory dedicated to research and development of renewable energy.

Schüco is a German supplier of quality and contemporary looking thermal solar and P/V products offering sustainable solutions for energy-efficient construction.

Solar Rating and Certification Corporation is an independent testing and rating facility. " In 1980 the Solar Rating and Certification Corporation (SRCC) was incorporated as a non-profit organization whose primary purpose is the development and implementation of certification programs and national rating standards for solar energy equipment."