American Council on Renewable Energy (ACORE)
American Solar Energy Society (ASES)
American Wind Energy Association (AWEA)
Arizona Research Institute for Solar Energy at the University of Arizona
Arizona Solar Center   
Association of State Energy Research and Technology Transfer Institutions (ASERTTI)
BioEnergy Information Network
Biomass Energy Research Association (BERA)
CADDET Renewable Energy
California Solar Center
Center for Resource Solutions (CRS)
Database of State Incentives for Renewable Energy (DSIRE)
Energy Efficiency and Renewable Energy US Department of Energy
EnergyIdeas Clearinghouse
Farmingdale Solar Energy Center
Florida Renewable Energy Association (FREA)
Florida Renewable Energy Producers Association
Florida Solar Energy Center (FSEC)
Great Lakes Renewable Energy Association
The Green Building Institute
Green Energy Ohio
International Council for Local Environmental Initiatives (ICLEI)
Interstate Renewable Energy Council (IREC)
Long Island Shines
Midwest
Renewable Energy Association (MREA)
Montana Green Power
National Association of Regulatory Utility Commissioners (NARUC).
National Association of State Energy Officials (NASEO)
National Association of State Utility Consumer Advocates (NASUCA)
National Center for Photovoltaics
National Wind Coordinating Committee (NWCC)
National Renewable Energy Laboratory (NREL)
National Renewable Energy Council/Concentrating Solar Power Research
New Uses Council
North American Board of Certified Energy Practitioners (NABCEP)
North Carolina Solar Center (NCSC)
Northeast Sustainable Energy Association(NESEA)
Public Technology, Inc. (PTI)
Regulatory Assistance Project (RAP)
Renewable Energy and Energy Efficiency Partnership(REEEP)
Renewable Energy Policy Project (REPP)
Sandia National Laboratories - PV Division
Solar Electric Power Association (SEPA)(formerly the Utility PhotoVoltaic Group)
Solar Energy Industries Association (SEIA)
Solar Rating and Certification Corporation (SRCC)
Sustainable Buildings Industry Council (SBIC)
US Department of Energy (DOE)
US Environmental Protection Agency (EPA)