This is a difficult question because every home uses a different amount of electricity and each home also has different solar efficiency based on shade, the direction of your roof and pitch.
According to https://www.californiasolarstatistics.ca.gov/faq/#leads The average price per watt for a residential Solar system installed is $5.36 so if you had 275 watt panels the average price per panel would be $1,474.00 in California. However this price will very based on where you live in CA and what type of system you put in.
We are located in the San Bernardino mountains and in our area prices seem to be more like $4-$5 a Watt.