Solar panels in Madison County, IL
Compare solar costs, payback and local permit rules across 5 Madison County towns served by Ameren, then get free, no-obligation quotes.
Free, no-obligation quotes. Savings vary by home and utility. $0-down offers are leases or PPAs and are subject to approval.
Quick answer
Is solar worth it in Madison County, IL?
For many homes, yes. With a $150 monthly bill, we estimate a system costs about $10,200 to $10,300 after the Ameren rebate and Illinois Shines in Madison County, paying for itself in about 8.1 to 8.2 years on an unshaded, south-facing roof.
How does solar compare across Madison County towns?
| Town | Output per kW | Net cost | Payback | Median home value | Owner-occupied |
|---|---|---|---|---|---|
| Alton | 1,290 kWh | $10,300 | 8.2 yrs | $103,700 | 60% |
| Collinsville | 1,300 kWh | $10,200 | 8.1 yrs | $163,600 | 66% |
| Edwardsville | 1,290 kWh | $10,300 | 8.2 yrs | $299,800 | 67% |
| Glen Carbon | 1,300 kWh | $10,200 | 8.1 yrs | $282,000 | 69% |
| Granite City | 1,300 kWh | $10,200 | 8.1 yrs | $104,300 | 73% |
Estimates for a cash purchase on an unshaded, south-facing roof. Home values and ownership rates are U.S. Census Bureau American Community Survey 5-year estimates; n/a means no Census figure was available. How we estimate
What do Madison County towns require for solar?
Permits and zoning rules are set town by town. Highlights from each town's own rules:
- Alton: Alton's Department of Building & Zoning uses a dedicated solar permit application for roof- and ground-mounted systems.
- Collinsville: Collinsville's residential building permit application, handled by the Community Development Department's Building Division, asks solar installers for their distributed generation (DG) certification number.
- Edwardsville: Edwardsville requires a building permit for residential solar installations, submitted to the city's Public Works Department before work begins.
- Glen Carbon: Glen Carbon takes all permit applications and plan submittals through its online Licensing & Permitting Portal and no longer accepts paper or emailed applications.
- Granite City: Granite City's Building & Zoning Department reviews plans before construction and lists electrical work among the jobs that need a building permit; the permit line is (618) 452-6218.
Each town page has the full details and sources.
How do I keep solar from raising my Madison County property taxes?
File form PTAX-330 with the Madison County assessment office. Under Illinois law, a home with solar can be assessed as if it had a conventional energy system, so panels don't raise your assessment.
How does solar work with Ameren in Madison County?
Ameren pays about $300 per kW in rebates for new home solar systems with a smart inverter, and since 2025 credits exported power at the supply rate. Power you use as your panels produce it still saves the full retail rate.
See the full Ameren solar guide.
Choosing a company? See how to choose a solar installer in Illinois and what a solar quote should include.
Madison County solar FAQ
Which electric utility serves Madison County?
The towns we cover in Madison County are served by Ameren, which pays about $300 per kW in rebates for new solar systems and credits exported power at the supply rate.
How long does solar take to pay back in Madison County?
For an unshaded home with a $150 monthly bill, we estimate payback of about 8.1 to 8.2 years in Madison County, after the utility rebate and Illinois Shines.
Will solar raise my property taxes in Madison County?
Not if you file form PTAX-330. Illinois lets the county assess a home with solar as if it had a conventional energy system. See how Illinois taxes homes with solar.
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