Johnson County, IL solar installation & market data
Updated July 23, 2026Provisional score · under 500 installs By The SolarDNA Data Team
Johnson County has 77 solar installations across 10 zip codes, recent growth not yet measurable, and an installs-weighted Market Score of 41.
Active installations
77
Zip markets
10
Median cost
—
12-mo growth
—
Installers active
10
County Market Score
Good · installs-weighted across 10 zips
Best zip in Johnson County scores higher than 42% of U.S. zip markets.
Versus Illinois
How Johnson County compares with the state
Installed cost
—
state median $6.56/W
Market score
41 vs 43
Illinois scores 43
Share of state installs
0.07%
of 112.7K tracked statewide
Battery attach
0.0%
state 0.0%
Statewide momentum
▲ 23.1%
residential solar added in Illinois, 12 months through Jul 2026
Statewide market
136.9K systems
4.0% of homes · utility-reported through Jul 2026
Growth & pricing
Johnson County by year
25 installs in the trailing twelve months vs 13 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Johnson County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SOLARSHIPS INSTALLATION SERVICES | 6 | 6 | 2 | — |
| 2 | LGCY POWER | 3 | 3 | 2 | — |
| 3 | FREEDOM FOREVER | 3 | 3 | 2 | — |
| 4 | ADVANCED ENERGY SOLUTIONS GROUP | 3 | 1 | 3 | — |
| 5 | ABSOLUTE CLIMATE D B A C H ELECTRIC | 1 | 1 | 1 | — |
| 6 | GOODPWR | 1 | 1 | 1 | — |
| 7 | RESIDENTIAL SERVICE PROVIDERS | 1 | 0 | 1 | — |
| 8 | SUN SOLAR | 1 | 0 | 1 | — |
| 9 | REVOLUTION ENERGY SYSTEMS | 1 | 1 | 1 | — |
| 10 | CR SOLAR | 1 | 1 | 1 | — |