Montgomery County, IL solar installation & market data
Updated September 24, 2026 By The SolarDNA Data Team
Montgomery County has 651 solar installations across 16 zip codes, installations down 18.1% over the trailing twelve months, and an installs-weighted Market Score of 41.
Active installations
651
Zip markets
16
Median cost
—
12-mo growth
▼ 18.1%
Installers active
36
County Market Score
Good · installs-weighted across 16 zips
Best zip in Montgomery County scores higher than 48% of U.S. zip markets.
Versus Illinois
How Montgomery County compares with the state
Installed cost
—
state median $6.56/W
Market score
41 vs 43
Illinois scores 43
Share of state installs
0.58%
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: 96–118 installs (midpoint 107)
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
Montgomery County by year
118 installs in the trailing twelve months vs 144 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Montgomery County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | LMD SOLAR | 62 | 18 | 11 | — |
| 2 | SOLARSHIPS INSTALLATION SERVICES | 31 | 29 | 9 | — |
| 3 | IL-SOLAR | 24 | 10 | 11 | — |
| 4 | OFF GRID BLUE SKY SMART SOLUTIONS | 15 | 0 | 7 | — |
| 5 | OFF GRID ENERGY SOLUTIONS | 13 | 12 | 5 | — |
| 6 | BLUE SKY SMART SOLUTIONS | 9 | 1 | 5 | — |
| 7 | FREEDOM FOREVER | 7 | 7 | 5 | — |
| 8 | LGCY POWER | 7 | 4 | 4 | — |
| 9 | ROUTE 66 SOLAR | 6 | 0 | 3 | — |
| 10 | STREIB COMPANY | 4 | 2 | 2 | — |
| 11 | OFF GRID ENERGY SOLUTIONS DBA AVEYO | 4 | 3 | 4 | — |
| 12 | REVOLUTION ENERGY SYSTEMS | 4 | 2 | 1 | — |
| 13 | SUNRUN | 4 | 0 | 1 | — |
| 14 | GOODPWR | 4 | 4 | 3 | — |
| 15 | SOLIS ENERGY SERVICES | 2 | 1 | 2 | — |
| 16 | WW ENTERPRISES IL | 2 | 0 | 2 | — |
| 17 | CR SOLAR | 2 | 1 | 2 | — |
| 18 | ADT SOLAR | 2 | 1 | 1 | — |
| 19 | AMBIA ENERGY | 2 | 2 | 1 | — |
| 20 | STRAIGHTUP SOLAR | 1 | 0 | 1 | — |
| 21 | CLOSS ELECTRIC COMPANY | 1 | 1 | 1 | — |
| 22 | PALS ELECTRIC | 1 | 0 | 1 | — |
| 23 | APTIVE SOLAR DBA AMBIA ENERGY | 1 | 1 | 1 | — |
| 24 | ONE EARTH SOLAR | 1 | 1 | 1 | — |
| 25 | MB HEATING & COOLING | 1 | 1 | 1 | — |