This list highlights 23 significant solar energy companies based in California, featuring firms of varying sizes from established leaders like SunPower, founded in 1985, to newer entrants such as GAF Energy, established in 2019.
Scaling your system may involve: Upgrading wiring or circuit protection Adding distribution panels Ensuring compliance with local electrical codes Coordinate with a qualified solar engineer to ensure compatibility between existing components and new inverters or modules.
Solar power includes solar farms as well as local distributed generation, mostly on rooftops and increasingly from community solar arrays. In 2025, utility-scale solar power generated 295.
Guidance on connecting small and large-scale generation and energy storage to our network. Can't find what you are looking for? Our dedicated teams power ahead, 24 hours a day, seven days a week to keep you and your community connected.
If you're looking at the benefits of solar careers, large-scale solar PV - solar farms that feed power into the national grid - offers high-impact work, good pay, and long-term prospects.