Decatur, IL solar installation & market data
Updated September 22, 2026 By The SolarDNA Data Team
Decatur has 540 solar installations across 4 zip codes, installations up 25.5% over the trailing twelve months, and an installs-weighted Market Score of 48.
Active installations
540
Zip markets
4
Median cost
—
12-mo growth
▲ 25.5%
Installers active
45
City Market Score
Great · installs-weighted across 4 zips
Best zip in Decatur scores higher than 85% of U.S. zip markets.
Versus Illinois
How Decatur compares with the state
Installed cost
—
state median $6.56/W
Market score
48 vs 43
Illinois scores 43
Share of state installs
0.48%
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: 203–263 installs (midpoint 233)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±13% band. Not a forecast of permits or policy.
Growth & pricing
Decatur by year
207 installs in the trailing twelve months vs 165 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Decatur
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 98 | 53 | 3 | — |
| 2 | FREEDOM FOREVER | 27 | 22 | 3 | — |
| 3 | BRIGHT PLANET SOLAR | 27 | 23 | 3 | — |
| 4 | LGCY POWER | 23 | 18 | 3 | — |
| 5 | LEGACY SOLAR | 17 | 13 | 4 | — |
| 6 | ROUTE 66 SOLAR | 15 | 8 | 3 | — |
| 7 | CR SOLAR | 14 | 11 | 3 | — |
| 8 | SOLARSHIPS INSTALLATION SERVICES | 12 | 12 | 2 | — |
| 9 | TRON SOLAR | 10 | 4 | 3 | — |
| 10 | OFF GRID BLUE SKY SMART SOLUTIONS | 7 | 1 | 3 | — |
| 11 | SOLAR MITE ILLINOIS | 6 | 6 | 2 | — |
| 12 | AMBIA ENERGY | 5 | 5 | 3 | — |
| 13 | REVOLUTION ENERGY SYSTEMS | 4 | 4 | 3 | — |
| 14 | ADT SOLAR | 4 | 2 | 3 | — |
| 15 | PALMETTO SOLAR | 4 | 4 | 2 | — |
| 16 | CONTEMPORARY CONTRACTING | 4 | 0 | 2 | — |
| 17 | SPARC SOLAR | 4 | 4 | 2 | — |
| 18 | OFF GRID ENERGY SOLUTIONS | 3 | 2 | 3 | — |
| 19 | BLUE SKY SMART SOLUTIONS | 3 | 0 | 2 | — |
| 20 | PALS ELECTRIC | 2 | 1 | 2 | — |
| 21 | IL-SOLAR | 2 | 2 | 1 | — |
| 22 | AVEYO OFF GRID ENERGY SOLUTIONS | 2 | 2 | 1 | — |
| 23 | CORVUS PRO SOLAR LLP | 2 | 1 | 2 | — |
| 24 | STRAIGHTUP SOLAR | 2 | 0 | 2 | — |
| 25 | APTIVE SOLAR DBA AMBIA ENERGY | 1 | 1 | 1 | — |