Douglas County, IL solar installation & market data
Updated September 23, 2026Provisional score · under 500 installs By The SolarDNA Data Team
Douglas County has 263 solar installations across 8 zip codes, installations up 17.0% over the trailing twelve months, and an installs-weighted Market Score of 41.
Active installations
263
Zip markets
8
Median cost
—
12-mo growth
▲ 17.0%
Installers active
32
County Market Score
Good · installs-weighted across 8 zips
Best zip in Douglas County scores higher than 46% of U.S. zip markets.
Versus Illinois
How Douglas County compares with the state
Installed cost
—
state median $6.56/W
Market score
41 vs 43
Illinois scores 43
Share of state installs
0.23%
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
Next-12-month outlook: 60–74 installs (midpoint 67)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±10% band. Not a forecast of permits or policy.
Growth & pricing
Douglas County by year
62 installs in the trailing twelve months vs 53 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Douglas County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | FREEDOM FOREVER | 12 | 9 | 5 | — |
| 2 | OFF GRID ENERGY SOLUTIONS | 8 | 8 | 4 | — |
| 3 | LGCY POWER | 7 | 6 | 5 | — |
| 4 | CR SOLAR | 7 | 7 | 4 | — |
| 5 | BLUE SKY SMART SOLUTIONS | 6 | 0 | 4 | — |
| 6 | ROUTE 66 SOLAR | 6 | 1 | 4 | — |
| 7 | SUNRUN | 5 | 2 | 2 | — |
| 8 | WELLSPRING COMPONENTS | 5 | 1 | 4 | — |
| 9 | LEGACY SOLAR | 5 | 5 | 3 | — |
| 10 | SOLARSHIPS INSTALLATION SERVICES | 4 | 4 | 4 | — |
| 11 | AG TECHNOLOGIES | 3 | 1 | 3 | — |
| 12 | BRIGHT PLANET SOLAR | 2 | 2 | 1 | — |
| 13 | HARVEST ENERGY SOLUTIONS | 2 | 0 | 2 | — |
| 14 | SOLAR MITE ILLINOIS | 2 | 2 | 2 | — |
| 15 | WAMPOLE MILLER DBA MILLER BROS | 2 | 0 | 1 | — |
| 16 | SUN SOLAR ILLINOIS | 2 | 0 | 2 | — |
| 17 | TITAN SOLAR POWER | 1 | 0 | 1 | — |
| 18 | GOODPWR | 1 | 1 | 1 | — |
| 19 | DISTRIBUTED GENERATION | 1 | 1 | 1 | — |
| 20 | AVEYO OFF GRID ENERGY SOLUTIONS | 1 | 1 | 1 | — |
| 21 | RADIANT SOLAR | 1 | 1 | 1 | — |
| 22 | PALMETTO SOLAR | 1 | 1 | 1 | — |
| 23 | ONE PLANET SOLAR AND WIND | 1 | 0 | 1 | — |
| 24 | BTB ENERGY SOLUTIONS | 1 | 1 | 1 | — |
| 25 | WELLSPRING SOLAR | 1 | 1 | 1 | — |