Solar installer

California Solar Electric Systems

Name: California Solar Electric Systems
Address: Grass Valley, CA, 95945, US
Telephone: (626) 998-4928

Based at Grass Valley, CA 95945. Installed solar on 902 homes since 2023 in California. Installing since 2003. Latest install on record: August 2026.

(626) 998-4928

Homes since 2023: 902
Median price: $4.04/W
Typical system: 7.2 kW
Leased or PPA: 0%

Price

Homes that bought their system from California Solar Electric Systems paid a median $4.04/W installed, and the middle half paid $3.50/W–$4.48/W (403 systems since 2023, before incentives). That's about the same as the California median of $4.07/W.

48% of its recent systems included a battery.

Where it installs

Counties with homes it installed since 2023, busiest first.

Nevada County, CA · 302 Ventura County, CA · 185 Los Angeles County, CA · 128 Orange County, CA · 61 San Bernardino County, CA · 60 Santa Barbara County, CA · 54 Placer County, CA · 48 Riverside County, CA · 31 Yuba County, CA · 16 El Dorado County, CA · 4 San Mateo County, CA · 3 Alameda County, CA · 2 Butte County, CA · 2 Sutter County, CA · 2 Marin County, CA · 1 San Diego County, CA · 1 San Joaquin County, CA · 1 Sierra County, CA · 1

By state

State	Homes	Median
California	902	$4.04/W

Homes installed since 2023.

Installed prices and installers from public installation records: Lawrence Berkeley National Laboratory’s Tracking the Sun (systems installed through 2025) and state program files from California, New York, New Jersey, Connecticut, Illinois and Oregon, which run into 2026. Prices are in dollars per watt of panel capacity (DC), before rebates and tax credits, for homes that bought their system; leased systems and systems with batteries are left out.