Solar installer

Certasun

Installed solar on 1,786 homes since 2023 in 2 states. Installing since 2021. Latest install on record: September 2026.

Homes since 2023: 1,786
Median price: $3.80/W
Typical system: 7.2 kW
Leased or PPA: 0%

Price

Homes that bought their system from Certasun paid a median $3.80/W installed, and the middle half paid $3.37/W–$4.03/W (22 systems since 2023, before incentives). That's $0.12 a watt below the Wisconsin median of $3.92/W.

Where it installs

Counties with homes it installed since 2023, busiest first.

Cook County, IL · 628 DuPage County, IL · 337 Lake County, IL · 269 Will County, IL · 228 Kane County, IL · 124 McHenry County, IL · 95 Kendall County, IL · 50 Kankakee County, IL · 9 Boone County, IL · 8 Winnebago County, IL · 8 DeKalb County, IL · 7 Milwaukee County, WI · 7 Racine County, WI · 5 Waukesha County, WI · 4 Kenosha County, WI · 3 Walworth County, WI · 3 Grundy County, IL · 1

By state

State	Homes	Median
Illinois	1,764	—
Wisconsin	22	$3.80/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.