Seneca, IL solar installation & market data
Updated September 21, 2026Provisional score · under 500 installs By The SolarDNA Data Team
Seneca has 23 solar installations across 1 zip code, recent growth not yet measurable, and an installs-weighted Market Score of 41.
Active installations
23
Zip markets
1
Median cost
—
12-mo growth
—
Installers active
8
City Market Score
Good · installs-weighted across 1 zips
Best zip in Seneca scores higher than 42% of U.S. zip markets.
Versus Illinois
How Seneca compares with the state
Installed cost
—
state median $6.56/W
Market score
41 vs 43
Illinois scores 43
Share of state installs
0.02%
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
Growth & pricing
Seneca by year
5 installs in the trailing twelve months vs 6 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Seneca
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | FREEDOM FOREVER | 2 | 1 | 1 | — |
| 2 | GREENGRIDS | 1 | 1 | 1 | — |
| 3 | LEGACY SOLAR | 1 | 1 | 1 | — |
| 4 | SUNRUN | 1 | 1 | 1 | — |
| 5 | AILEY SOLAR ELECTRIC | 1 | 0 | 1 | — |
| 6 | BLUE SKY SMART SOLUTIONS | 1 | 0 | 1 | — |
| 7 | GRNE-NELNET | 1 | 0 | 1 | — |
| 8 | OFF GRID BLUE SKY SMART SOLUTIONS | 1 | 0 | 1 | — |
Zip markets
Zips in Seneca
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 61360 | 23 | — | 41 C |