Quincy, IL solar installation & market data
Updated September 23, 2026 By The SolarDNA Data Team
Quincy has 509 solar installations across 2 zip codes, installations down 25.0% over the trailing twelve months, and an installs-weighted Market Score of 43.
Active installations
509
Zip markets
2
Median cost
—
12-mo growth
▼ 25.0%
Installers active
23
City Market Score
Good · installs-weighted across 2 zips
Best zip in Quincy scores higher than 57% of U.S. zip markets.
Versus Illinois
How Quincy compares with the state
Installed cost
—
state median $6.56/W
Market score
43 vs 43
Illinois scores 43
Share of state installs
0.45%
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: 89–115 installs (midpoint 102)
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
Quincy by year
117 installs in the trailing twelve months vs 156 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Quincy
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | FREEDOM FOREVER | 63 | 33 | 2 | — |
| 2 | LANDMARK SOLAR | 43 | 29 | 2 | — |
| 3 | SUNSPOT SOLAR | 35 | 3 | 2 | — |
| 4 | SOURCE SOLAR | 22 | 22 | 2 | — |
| 5 | LGCY POWER | 8 | 5 | 2 | — |
| 6 | ADVANCED RENEWABLE CONCEPTS | 5 | 5 | 1 | — |
| 7 | OFF GRID BLUE SKY SMART SOLUTIONS | 5 | 0 | 2 | — |
| 8 | CORVUS PRO SOLAR LLP | 5 | 3 | 2 | — |
| 9 | SOLARSHIPS INSTALLATION SERVICES | 4 | 4 | 2 | — |
| 10 | LANDMARK IRRIGATION & DRAINAGE DBA LANDMARK SOLAR | 4 | 4 | 2 | — |
| 11 | IDEAL ENERGY | 3 | 0 | 2 | — |
| 12 | TRON SOLAR | 3 | 3 | 2 | — |
| 13 | AVEYO OFF GRID ENERGY SOLUTIONS | 2 | 2 | 2 | — |
| 14 | LANDMARK IRRIGATION | 2 | 1 | 1 | — |
| 15 | STREIB COMPANY | 1 | 0 | 1 | — |
| 16 | BLUE SKY SMART SOLUTIONS | 1 | 0 | 1 | — |
| 17 | SUN SOLAR | 1 | 0 | 1 | — |
| 18 | EAGLE POINT SOLAR | 1 | 0 | 1 | — |
| 19 | SUN SOLAR ILLINOIS | 1 | 0 | 1 | — |
| 20 | PALS ELECTRIC | 1 | 0 | 1 | — |
| 21 | MOXIE SOLAR | 1 | 0 | 1 | — |
| 22 | NELNET RENEWABLE ENERGY | 1 | 1 | 1 | — |
| 23 | REVOLUTION ENERGY SYSTEMS | 1 | 1 | 1 | — |