The average cost of a commercial solar panel system in California is $2.50 per watt, with prices ranging from $2.20 to $2.80 per watt, depending on the system size and installation company.
The California Public Utilities Commission reports that the average cost of commercial solar panel systems in California decreased by 12% in 2024, with an average cost per watt of $2.45.
According to the Solar Energy Industries Association, the average cost of commercial solar panel systems in California was $2.38 per watt in Q1 2024, with a total of 1.4 GW of commercial solar installed in the state.
Use our commercial solar panel cost calculator to estimate the cost of a solar panel system for your business in California, with prices starting at $2.25 per watt for a 100 kW system.
The Database of State Incentives for Renewables and Efficiency provides an overview of commercial solar incentives in California, including the federal tax credit and state rebates, which can reduce the cost per watt of a commercial solar panel system.
Watch our video to learn about the current prices of commercial solar panel systems in California, including the cost per watt and total system costs for different sizes of commercial solar installations.
SunPower provides commercial solar panel system design and installation services in California, with systems starting at $2.40 per watt for a 50 kW system, and offering a 25-year warranty on our solar panels.
The National Renewable Energy Laboratory reports that the cost per watt of commercial solar panel systems in California decreased by 15% in 2024, with an average cost per watt of $2.32, based on data from the OpenPV project.