Will County, IL solar installation & market data
Updated October 1, 2026 By The SolarDNA Data Team
Will County has 8,986 solar installations across 32 zip codes, installations down 19.9% over the trailing twelve months, and an installs-weighted Market Score of 40.
Active installations
8,986
Zip markets
32
Median cost
—
12-mo growth
▼ 19.9%
Installers active
119
County Market Score
Good · installs-weighted across 32 zips
Best zip in Will County scores higher than 62% of U.S. zip markets.
Versus Illinois
How Will County compares with the state
Installed cost
—
state median $6.56/W
Market score
40 vs 43
Illinois scores 43
Share of state installs
7.97%
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: 977–1,194 installs (midpoint 1,085)
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
Will County by year
1,205 installs in the trailing twelve months vs 1,505 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Will County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 952 | 482 | 32 | — |
| 2 | FREEDOM FOREVER | 225 | 134 | 27 | — |
| 3 | BRIGHT PLANET SOLAR | 130 | 72 | 27 | — |
| 4 | BRS FIELD OPS | 123 | 72 | 13 | — |
| 5 | CERTASUN | 81 | 47 | 17 | — |
| 6 | BLUE RAVEN SOLAR | 71 | 1 | 15 | — |
| 7 | TESLA | 48 | 8 | 15 | — |
| 8 | SUNPOWER | 44 | 43 | 19 | — |
| 9 | FRESH COAST SOLAR | 42 | 20 | 18 | — |
| 10 | LGCY POWER | 32 | 26 | 21 | — |
| 11 | GREENGRIDS | 32 | 19 | 16 | — |
| 12 | TRON SOLAR | 29 | 15 | 15 | — |
| 13 | GREEN GRIDS SOLAR | 26 | 26 | 15 | — |
| 14 | VIVINT SOLAR DEVELOPER | 25 | 3 | 11 | — |
| 15 | SPARC SOLAR | 21 | 20 | 12 | — |
| 16 | ION SOLAR | 16 | 16 | 13 | — |
| 17 | GREENLINK SOLAR SOLUTIONS | 15 | 9 | 6 | — |
| 18 | QUALITY SOLAR | 15 | 8 | 8 | — |
| 19 | ION DEVELOPER | 15 | 5 | 7 | — |
| 20 | REVOLUTION ENERGY SYSTEMS | 14 | 10 | 7 | — |
| 21 | UNITY SOLAR GROUP | 13 | 12 | 5 | — |
| 22 | NATIONAL SOLAR SERVICE | 12 | 1 | 8 | — |
| 23 | RETHINK ELECTRIC | 10 | 0 | 6 | — |
| 24 | CR SOLAR | 10 | 5 | 7 | — |
| 25 | TRUHOME PROS | 9 | 6 | 6 | — |
Zip markets
Zips in Will County
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 60446 | 878 | — | 38 D |
| 60440 | 826 | — | 44 C |
| 60586 | 802 | — | 39 C |
| 60490 | 638 | — | 37 D |
| 60564 | 547 | — | 35 D |
| 60585 | 493 | — | 34 D |
| 60431 | 488 | — | 43 C |
| 60435 | 425 | — | 41 C |
| 60544 | 420 | — | 39 C |
| 60503 | 369 | — | 43 C |
| 60441 | 306 | — | 43 C |
| 60404 | 303 | — | 43 C |
| 60423 | 254 | — | 42 C |
| 60487 | 238 | — | 42 C |
| 60451 | 229 | — | 42 C |
| 60410 | 180 | — | 42 C |
| 60403 | 156 | — | 42 C |
| 60442 | 145 | — | 42 C |
| 60417 | 139 | — | 42 C |
| 60491 | 135 | — | 42 C |
| 60428 | 126 | — | 42 C |
| 60448 | 118 | — | 42 C |
| 60484 | 116 | — | 42 C |
| 60436 | 114 | — | 42 C |
| 60433 | 96 | — | 41 C |
| 60432 | 85 | — | 41 C |
| 60449 | 77 | — | 41 C |
| 60481 | 67 | — | 41 C |
| 60468 | 61 | — | 41 C |
| 60401 | 58 | — | 41 C |
| 60408 | 56 | — | 41 C |
| 60421 | 41 | — | 41 C |