Dept. of Energy
http://www.eere.energy.gov

Database of State Incentives for Renewables & Efficiency
http://www.dsireusa.org

Interstate Renewable Energy Council
http://www.irecusa.org

National Renewable Energy Laboratory
http://www.nrel.gov

Solar Electric Power Association
http://www.solarelectricpower.org

                                                                   Solar Energy Industries Association
                                                                   http://www.seia.org

                                                                   American Council on Renewable Energy
                                                                   http://www.acore.org

                                                                   California Solar Energy Industries Association
                                                                   http://calseia.org