Solar installer

Semper Solaris

Name: Semper Solaris
Address: El Cajon, CA, 92020, US
Telephone: (619) 715-4054

Based at El Cajon, CA 92020. Installed solar on 8,151 homes since 2023 in California. Installing since 2013. Latest install on record: August 2026.

(619) 715-4054

Homes since 2023: 8,151
Median price: $4.45/W
Typical system: 6.2 kW
Leased or PPA: 4%

Price

Homes that bought their system from Semper Solaris paid a median $4.45/W installed, and the middle half paid $4.13/W–$5.08/W (3,398 systems since 2023, before incentives). That's $0.38 a watt above the California median of $4.07/W.

43% of its recent systems included a battery.

Where it installs

Counties with homes it installed since 2023, busiest first.

San Diego County, CA · 3,523 Los Angeles County, CA · 641 Riverside County, CA · 492 Contra Costa County, CA · 417 Santa Clara County, CA · 414 Alameda County, CA · 409 San Bernardino County, CA · 400 Orange County, CA · 352 San Mateo County, CA · 206 Ventura County, CA · 147 San Joaquin County, CA · 135 Kern County, CA · 124 Marin County, CA · 121 Solano County, CA · 120 Fresno County, CA · 96 Sonoma County, CA · 81 Santa Cruz County, CA · 53 Napa County, CA · 42 Placer County, CA · 39 Tulare County, CA · 35 El Dorado County, CA · 34 Monterey County, CA · 34 Madera County, CA · 32 Yolo County, CA · 25 Merced County, CA · 22 San Benito County, CA · 22 Kings County, CA · 21 Calaveras County, CA · 16 Stanislaus County, CA · 16 Yuba County, CA · 16 San Francisco County, CA · 11 Tuolumne County, CA · 10 Butte County, CA · 8 Nevada County, CA · 8 Sutter County, CA · 8 Mariposa County, CA · 7 Amador County, CA · 6 Colusa County, CA · 2 Santa Barbara County, CA · 2 Sacramento County, CA · 1 San Luis Obispo County, CA · 1

By state

State	Homes	Median
California	8,151	$4.45/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.