Iowa / Spencer
Is solar worth it in Spencer?
Interstate Power and Light Co averages 17.9¢/kWh. With 4.4 peak sun hours a day, a typical 8.1 kW system makes ~10,408 kWh a year and saves about $1,863 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 Spencer compares
That is faster than the Iowa average of 12.3 years, mainly because Spencer's rate is above the state average of 14.6¢/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 |
|---|---|---|---|
| Storm Lake | 11.0¢ | 15.4 yrs | $19,630 |
| Le Mars | 11.0¢ | 15.3 yrs | $19,731 |
| Fort Dodge | 11.0¢ | 15.4 yrs | $19,630 |
| Carroll | 11.0¢ | 15.4 yrs | $19,630 |
| Sioux | 11.0¢ | 15.1 yrs | $20,085 |
| Mason | 17.9¢ | 10.6 yrs | $44,659 |
| Boone | 17.9¢ | 10.2 yrs | $45,509 |
| Ames | 12.1¢ | 14.3 yrs | $23,571 |
Questions
How long does solar take to pay off in Spencer, IA?
About 10.4 years for a typical 8.1 kW system at 17.9 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 Spencer?
Often, if you plan to stay long-term. Our estimate is $1,863 saved in year one and $45,642 net over 25 years after paying for the system.
How much does a solar system cost in Spencer?
A 8.1 kW system sized for an average home (863 kWh/month) is about $22,275 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.
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