The average cost to install solar on a home in California is $4.76 per watt, with about 80 percent of systems installed for $3.13 per watt to $5.80 per watt. This is lower than the average solar cost in the Pacific Region of $4.79 per watt.
The average size of a solar system in California is 5.6 kilowatts, which would cost around $26,700 without any federal, state, or local incentives.
1 kilowatt of solar PV in California produces an average of 1,479 kilowatt-hours of electricity per year, so a 5.6 kilowatt solar system would generate 8,280 kilowatt-hours of electricity every year. An average household in California uses 6,680 kilowatt-hours of electricity in a year.
With an average state electricity price of 18 cents per kilowatt-hour, this solar system could save a household in California $1,509 each year. At this rate of annual savings, the system could pay for itself in about 18 years assuming no additional system expenses. This is less than the expected 30-year lifespan of a typical solar panel.
Fresno: 6.6 kilowatt system installed for $5.35 per watt by Quality Home Services
Cathedral City: 7.1 kilowatt system installed for $4.23 per watt by Evolution Energy
Ramona: 7.4 kilowatt system installed for $3.54 per watt by REC Solar
San Marcos: 4.7 kilowatt system installed for $3.70 per watt by Vision Solar
Stockton: 6.9 kilowatt system installed for $4.69 per watt by California Solar Systems
Alpine: 10.4 kilowatt system installed for $3.86 per watt by Green America Construction
Solar companies with some of the lowest system costs in California include:
South West Sun Solar, A1 Sun, Bright Life Solar, Clean Energy Solutions, Solar Service Center
Get more information about the best California solar companies for low system costs.