Initial, All solar installers need to hold a sound and Energetic license in the Contractors State License Board (CSLB). They will hold any of the next to generally be Licensed for solar installations in California: a solar contractor license, an electrical contractor license or simply a normal creating contractor license. https://www.americanarraysolar.com/what-are-the-pros-of-hiring-a-solar-company-in-the-first-place/