1st, all solar installers need to keep a valid and active license with the Contractors State License Board (CSLB). They will maintain any of the next to get Accredited for solar installations in California: a solar contractor license, an electrical contractor license or even a standard developing contractor license. Installation https://www.americanarraysolar.com/what-are-the-pros-of-hiring-a-solar-company-in-the-first-place/