Marshall County, IL solar installation & market data
Updated September 1, 2026Provisional score · under 500 installs By The SolarDNA Data Team
Marshall County has 213 solar installations across 9 zip codes, installations down 12.1% over the trailing twelve months, and an installs-weighted Market Score of 41.
Active installations
213
Zip markets
9
Median cost
—
12-mo growth
▼ 12.1%
Installers active
27
County Market Score
Good · installs-weighted across 9 zips
Best zip in Marshall County scores higher than 44% of U.S. zip markets.
Versus Illinois
How Marshall County compares with the state
Installed cost
—
state median $6.56/W
Market score
41 vs 43
Illinois scores 43
Share of state installs
0.19%
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: 49–59 installs (midpoint 54)
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
Marshall County by year
58 installs in the trailing twelve months vs 66 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Marshall County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 16 | 8 | 4 | — |
| 2 | LEGACY SOLAR | 13 | 9 | 6 | — |
| 3 | FREEDOM FOREVER | 11 | 11 | 3 | — |
| 4 | OASIS WORLD SOLUTIONS | 7 | 3 | 4 | — |
| 5 | CR SOLAR | 2 | 2 | 1 | — |
| 6 | KAISER ELECTRIC CONTRACTORS | 2 | 1 | 1 | — |
| 7 | HARVEST SOLAR | 2 | 2 | 1 | — |
| 8 | LGCY POWER | 2 | 2 | 2 | — |
| 9 | SOURCE SOLAR | 2 | 2 | 1 | — |
| 10 | EMPWR SOLAR LLP | 1 | 1 | 1 | — |
| 11 | PALMETTO SOLAR | 1 | 1 | 1 | — |
| 12 | 100 AMPS | 1 | 1 | 1 | — |
| 13 | A M KERNS CONSTRUCTION | 1 | 0 | 1 | — |
| 14 | OFF GRID ENERGY SOLUTIONS DBA AVEYO | 1 | 1 | 1 | — |
| 15 | SOLAR ENERGY OF ILLINOIS | 1 | 1 | 1 | — |
| 16 | SOLAR PANTHER | 1 | 0 | 1 | — |
| 17 | EAGLE POINT SOLAR | 1 | 1 | 1 | — |
| 18 | SOLAR POWER MIDWEST | 1 | 0 | 1 | — |
| 19 | GOODPWR | 1 | 1 | 1 | — |
| 20 | REFICIENCY | 1 | 1 | 1 | — |
| 21 | REVOLUTION ENERGY SYSTEMS | 1 | 1 | 1 | — |
| 22 | SUN SOLAR ILLINOIS | 1 | 0 | 1 | — |
| 23 | OBERLANDER ELECTRIC | 1 | 0 | 1 | — |
| 24 | SANTE GROUP | 1 | 1 | 1 | — |
| 25 | RETHINK ELECTRIC | 1 | 1 | 1 | — |