Illinois / Herrin
Is solar worth it in Herrin?
Ameren Illinois Company averages 8.3¢/kWh. With 4.6 peak sun hours a day, a typical 7.7 kW system makes ~10,410 kWh a year and saves about $863 in year one.
No federal tax credit is included. The 30% homeowner credit (IRS §25D) ended for systems installed after Dec 31, 2025. What changed in 2026 →
How Herrin compares
That is slower than the Illinois average of 15.6 years, mainly because Herrin's rate is below the state average of 10.9¢/kWh. Your own payback depends on your bill: enter your ZIP and monthly bill above for your number.
| Nearby city | Rate | Payback | 25-yr net |
|---|---|---|---|
| Marion | 8.3¢ | 18.7 yrs | $10,296 |
| Carbondale | 8.3¢ | 18.7 yrs | $10,296 |
| Mount Vernon | 8.3¢ | 19.1 yrs | $9,490 |
| Centralia | 8.3¢ | 19.1 yrs | $9,490 |
| Shiloh | 8.3¢ | 19.0 yrs | $9,672 |
| Waterloo | 8.3¢ | 19.0 yrs | $9,672 |
| Belleville | 8.3¢ | 19.0 yrs | $9,672 |
| O'Fallon | 8.3¢ | 19.0 yrs | $9,672 |
Questions
How long does solar take to pay off in Herrin, IL?
About 18.7 years for a typical 7.7 kW system at 8.3 cents/kWh, assuming $2.75/W installed, full net metering and 3% yearly rate increases, with no federal tax credit.
Is solar worth it in Herrin?
Only in some cases; payback is long. Our estimate is $863 saved in year one and $10,296 net over 25 years after paying for the system.
How much does a solar system cost in Herrin?
A 7.7 kW system sized for an average home (863 kWh/month) is about $21,175 before any local rebates, at $2.75 per watt. Real quotes vary by roof and installer.
Is there a federal solar tax credit in 2026?
Not for homeowners who buy their system. The 30% Residential Clean Energy Credit (IRS section 25D) does not apply to installations completed after December 31, 2025. State rebates, SRECs and utility incentives may still apply.
Get real installer quotes in Herrin
Your number above is an estimate. Real bids usually land within 15%. Free, no obligation.
We may earn a referral fee from partners. Disclosure