Franklin County, IL solar installation & market data
Updated October 1, 2026Provisional score · under 500 installs By The SolarDNA Data Team
Franklin County has 320 solar installations across 15 zip codes, installations up 76.7% over the trailing twelve months, and an installs-weighted Market Score of 41.
Active installations
320
Zip markets
15
Median cost
—
12-mo growth
▲ 76.7%
Installers active
35
County Market Score
Good · installs-weighted across 15 zips
Best zip in Franklin County scores higher than 45% of U.S. zip markets.
Versus Illinois
How Franklin County compares with the state
Installed cost
—
state median $6.56/W
Market score
41 vs 43
Illinois scores 43
Share of state installs
0.28%
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: 126–170 installs (midpoint 148)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±15% band. Not a forecast of permits or policy.
Growth & pricing
Franklin County by year
129 installs in the trailing twelve months vs 73 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Franklin County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | LGCY POWER | 36 | 32 | 8 | — |
| 2 | ADVANCED ENERGY SOLUTIONS GROUP | 21 | 9 | 9 | — |
| 3 | SOLARSHIPS INSTALLATION SERVICES | 19 | 19 | 9 | — |
| 4 | FREEDOM FOREVER | 15 | 12 | 5 | — |
| 5 | GOODPWR | 8 | 8 | 4 | — |
| 6 | RESIDENTIAL SERVICE PROVIDERS | 8 | 3 | 5 | — |
| 7 | SUN SOLAR | 7 | 2 | 5 | — |
| 8 | OFF GRID ENERGY SOLUTIONS DBA AVEYO | 7 | 5 | 4 | — |
| 9 | CR SOLAR | 5 | 3 | 3 | — |
| 10 | SUNVOLT SOLAR | 4 | 2 | 3 | — |
| 11 | STRAIGHTUP SOLAR | 3 | 2 | 3 | — |
| 12 | POWUR PBC | 3 | 3 | 3 | — |
| 13 | OFF GRID ENERGY SOLUTIONS | 3 | 2 | 2 | — |
| 14 | CONTEMPORARY CONTRACTING | 3 | 2 | 2 | — |
| 15 | OFF GRID BLUE SKY SMART SOLUTIONS | 2 | 0 | 2 | — |
| 16 | BLUE SKY SMART SOLUTIONS | 2 | 0 | 2 | — |
| 17 | TRON SOLAR | 2 | 2 | 2 | — |
| 18 | HELIO SOLAR POWER | 2 | 0 | 2 | — |
| 19 | ABSOLUTE CLIMATE | 2 | 1 | 2 | — |
| 20 | AVEYO OFF GRID ENERGY SOLUTIONS | 2 | 2 | 2 | — |
| 21 | REVOLUTION ENERGY SYSTEMS | 2 | 0 | 2 | — |
| 22 | CORVUS PRO SOLAR | 1 | 1 | 1 | — |
| 23 | NATIONAL SOLAR ENERGY | 1 | 0 | 1 | — |
| 24 | OVERTURF ELECTRIC | 1 | 0 | 1 | — |
| 25 | LEGACY INSTALLATION SERVICES | 1 | 1 | 1 | — |