As of 2026, the average cost of commercial solar panels in California is around $2.50 per watt, with prices ranging from $2.20 to $3.00 per watt, depending on the system size and installation company.
According to the Solar Energy Industries Association, the average cost of commercial solar panels in the US has fallen by over 70% in the last decade, with California being one of the leading states in solar adoption, averaging $2.40 per watt.
The California Public Utilities Commission offers incentives for commercial solar panel installations, with the goal of reducing the average cost per watt to $2.00 by 2027, making solar energy more competitive with traditional energy sources.
Use our solar panel cost calculator to estimate the cost of commercial solar panels in California, with current prices ranging from $2.30 to $2.80 per watt, depending on the system size, installation company, and location.
Watch our video guide to learn about the installation process and average costs of commercial solar panels in California, with expert interviews and case studies, averaging $2.50 per watt.
A new report by Wood Mackenzie finds that the average cost of commercial solar panels in California has fallen by 15% in the last year, to $2.45 per watt, driven by increased competition and improved technology.
Based on data from over 1,000 solar panel installations in California, the average cost per watt is $2.38, with top-rated installers offering prices as low as $2.20 per watt for commercial systems.
Wells Fargo offers financing options for commercial solar panel installations in California, with competitive interest rates and terms, to help businesses take advantage of the average cost per watt of $2.50 and reduce their energy costs.