Solar Contractor Licensing

If you're installing active solar water heating, space heating, pool heating, or photovoltaics in California, look for a contractor holding a C-46 Solar Contractor license or other appropriate specialty licenses (such as C-10 for electrical work on PV systems). The California Contractors State License Board maintains the official list of licensed contractors and license classifications.

To offer solar services in California, you may need a C-46 Solar Contractor license for active solar systems and photovoltaics, or alternative specialty licenses (C-4 for thermal systems, C-10 for PV electrical work, C-20 for solar HVAC, C-36 for solar plumbing, C-53 for solar pool heating). C-46 requires four years of experience and passing both business/law and trade exams; independent license schools offer exam preparation courses. The California Contractors State License Board administers all classifications under Business and Professions Code Division 3, Chapter 9.

The California Contractors State License Board (CSLB) administers contractor licensing across multiple classifications, with C-46 being the primary solar-focused license covering active solar water/space heating, pool heating, and photovoltaics. Applicants must demonstrate four years of experience and pass standardized exams; independent schools support exam preparation. Additional solar work may fall under specialty licenses (C-4, C-10, C-20, C-36, C-53) depending on technology and system type, allowing targeted credential requirements for different solar market segments.