| 3M Renewable Energy | | Energy Management Department uses alternative energy sources to increase the renewable resources in 3M manufacturing and products. |
| Able Environmental | | Offers products and services about home heating using earth-based technologies. |
| ABS Alaskan Alternative Energy | | Alternative and renewable energy information and products, including solar power, wind energy, storage batteries, inverters and accessories. |
| Absolute Solar Company | | Design and supply of solar/wind energy systems using Kyocera solar panels and Trace Engineering inverters. |
| Acciona Energa | | Renewable energy company focused in the wind, biomass, small hydro, and solar industries. Pamplona, Spain. |
| Ainelec | | Equipment selection for stand alone/hybrid installations such as wind/diesel, biogas, hydro, photovoltaic, and fuel cell. |
| Alternative Fuels and Energy | | Develops and promotes renewable energy devices and practices. Main products are the Sun Lizard solar air heater and cooler, and biodiesel production and consultancy. |
| Alternative Power Inc | | Solar electric, wind and hydro power, portable solar PowerPacker and backup power systems. |
| American Solar Roofing Systems | | Solar thermal roofing system combining roofing tile technology and solar design. All-weather protection for the building that collects solar energy for space heating and hot water. |
| Ampliflaire | | Conservation of the environment central heating and waste energy recovery systems product and alternative energy development. |
| Atlas of reneweable energy | | A collection of maps, currently of Switzerland and Germany, indicating the occurrence of solar radiation, wind, waves, tides and ocean currents, hydro-power, biomass, and terrestrial heat. Address lists of companies and organisations active in the field of renewable energy are part of the atlas as well. |
| AWS Scientific | | An engineering and meteorological consulting firm offering renewable energy and environmental services to the private, energy and government sectors. |
| Big Frog Mountain | | Solar electric equipment, wind turbines, small hydro-electric generators, inverters. |
| CADDET Renewable Energy | | Providing information on full scale demonstration projects within wind, hydro, waste, solar, photovoltaics, tidal, and biomass. |
| Center for Resource Solutions | | Certification program provides a way to identify energy options, everyday consumer products and services that meet strict consumer protection and environmental standards. |
| CET Solar Supplies | | Renewable energy product distributor. From starter kits, separate components or entire system kits, including heating, lighting, appliances, water purifiers, water pumping, toilets, tankless water heating and wind generators. |
| Chi Energy | | Diversified renewables company using resources such as hydropower, biomass, landfill gas, wind, solar, and geothermal, along with other environmentally beneficial services. |
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