http://www.californiasolarcenter.org/
http://www.nabcep.org/installer-locator
https://bestcompany.com/solar/
Contact the Solar Energy Industries Association (SEIA) at 202-628-7745 for a list of solar service providers.
http://www.findsolar.com/
http://www.solarreviews.com/solar-industry/prescreened-solar-pros/
http://www.solarreviews.com/solar-power-installers/
https://www.californiasolarstatistics.ca.gov/search/contractor/
http://www.californiasolarstatistics.org/search/contractor/
http://www.nabcep.org/
http://www.find-solar.org/
Contact the Solar Energy Industries Association (SEIA) at 202-628-7745 for a list of solar service providers.
http://www.nabcep.org/installer-locator
http://www.findsolar.com/
Geostellar
http://solarenergy.com/
https://www.nyserda.ny.gov/Contractors/Find-a-Contractor/Photovoltaic-Installers.aspx
http://www.energysage.com/
http://www.sunible.com/ - provides an online service for homeowners to compare solar installers and get quotes. Incubated by SFUncube
http://sundowment.com/ - allow homeowners to take loans from universities and other endowments. It is also building its network of installers.