With professional installation, a typical 6-kilowatt residential solar panel system in California costs $14,669. That price drops to $10,055 after using the full federal solar investment tax credit (ITC).
[PDF Version]
Most solar professionals recommend sizing your inverter for solar panels between 75% and 115% of your total panel wattage, with the sweet spot around 1:1.
[PDF Version]
As of April 2026, the average solar panel system costs $2. 57/W including installation in San Diego, CA. 9 kW system (the average system size in San Diego, CA), this comes out to about $17,769 before any available incentives, though prices range from $15,104 to.
[PDF Version]
00/W installed and your electricity rate of $0. Because Section 25D expired on January 1, 2026, there is no federal tax credit for purchase, so the net cost is the same as the gross.
[PDF Version]
