Mercer County, IL solar installation & market data
Updated September 24, 2026Provisional score · under 500 installs By The SolarDNA Data Team
Mercer County has 277 solar installations across 11 zip codes, installations up 27.8% over the trailing twelve months, and an installs-weighted Market Score of 41.
Active installations
277
Zip markets
11
Median cost
—
12-mo growth
▲ 27.8%
Installers active
33
County Market Score
Good · installs-weighted across 11 zips
Best zip in Mercer County scores higher than 45% of U.S. zip markets.
Versus Illinois
How Mercer County compares with the state
Installed cost
—
state median $6.56/W
Market score
41 vs 43
Illinois scores 43
Share of state installs
0.25%
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: 68–90 installs (midpoint 79)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±14% band. Not a forecast of permits or policy.
Growth & pricing
Mercer County by year
69 installs in the trailing twelve months vs 54 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Mercer County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | FREEDOM FOREVER | 16 | 13 | 5 | — |
| 2 | LANDMARK SOLAR | 11 | 7 | 3 | — |
| 3 | OFF GRID ENERGY SOLUTIONS DBA AVEYO | 10 | 6 | 5 | — |
| 4 | LANDMARK IRRIGATION DBA LANDMARK SOLAR | 10 | 6 | 3 | — |
| 5 | EAGLE POINT SOLAR | 6 | 3 | 3 | — |
| 6 | LGCY POWER | 6 | 5 | 4 | — |
| 7 | LEGACY SOLAR | 4 | 4 | 2 | — |
| 8 | KAISER ELECTRIC CONTRACTORS | 3 | 0 | 2 | — |
| 9 | GROBSTICK SOLAR | 2 | 0 | 2 | — |
| 10 | ADT SOLAR | 2 | 1 | 2 | — |
| 11 | REVOLUTION ENERGY SYSTEMS | 2 | 2 | 2 | — |
| 12 | LANDMARK IRRIGATION | 2 | 0 | 1 | — |
| 13 | BLUE RAVEN SOLAR | 2 | 0 | 1 | — |
| 14 | OFF GRID ENERGY SOLUTIONS | 2 | 2 | 2 | — |
| 15 | OFF GRID BLUE SKY SMART SOLUTIONS | 2 | 0 | 2 | — |
| 16 | SUNSHINE SOLAR | 1 | 1 | 1 | — |
| 17 | TRON SOLAR | 1 | 1 | 1 | — |
| 18 | BLUE SKY SOLAR DBA SE CONSTRUCTION | 1 | 0 | 1 | — |
| 19 | AVEYO OFF GRID ENERGY SOLUTIONS | 1 | 1 | 1 | — |
| 20 | A M KERNS CONSTRUCTION | 1 | 1 | 1 | — |
| 21 | VOLT | 1 | 1 | 1 | — |
| 22 | AM KERNS CONSTRUCTION | 1 | 0 | 1 | — |
| 23 | ROOF TIGER PLLC | 1 | 0 | 1 | — |
| 24 | SOLARSHIPS INSTALLATION SERVICES | 1 | 1 | 1 | — |
| 25 | CR SOLAR LIMITED LIABILITY COMPANY | 1 | 0 | 1 | — |