Solar panels in Iowa City, IA
Roofs in Iowa City get about 1,591 hours of usable sunlight a year — more than 56% of the cities we've measured. Here's what that means in cost, savings and payback, using real rooftop data rather than a national average.
Check your specific roof in Iowa City → City averages are a starting point; your own roof's size, pitch and shading change the answer a lot.
What a typical Iowa City solar system costs
A 20-panel system (8 kW) is about right for an average Iowa City home using 10,800 kWh a year. It would produce roughly 10,819 kWh annually and offset 100% of that usage.
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 4,328 | $6,384 | $571 | 11.2 yrs |
| 12 panels | 4.8 kW | 6,491 | $9,576 | $857 | 11.2 yrs |
| 16 panels | 6.4 kW | 8,655 | $12,768 | $1,142 | 11.2 yrs |
| 20 panels | 8 kW | 10,819 | $15,960 | $1,426 | 11.2 yrs |
| 26 panels | 10.4 kW | 14,064 | $20,748 | $1,533 | 13.5 yrs |
Notice that payback barely improves as systems get bigger, and eventually gets worse. That's because you can only save money on electricity you were going to buy anyway. Once a system covers your usage, extra panels mostly generate exports at a much lower rate.
Why Iowa City gets 1,591 sun hours
That figure comes from Google's analysis of real rooftops across Iowa City — it already accounts for shading from trees, chimneys and neighbouring buildings, which is why it's lower than the raw "hours of daylight" figures you'll see elsewhere. An unusually open, unshaded roof in Iowa City reaches about 1,649 hours, roughly 4% better than typical.
The numbers behind this page
| Typical usable sunlight | 1,591 hrs/yr |
|---|---|
| Unshaded roof | 1,649 hrs/yr |
| Electricity rate (Iowa avg) | 13.2¢/kWh |
| Installed cost assumed | $2.85/W |
| Panel size assumed | 400 W |
| Federal tax credit | 30% |
| Typical household usage | 10,800 kWh/yr |
| Power used as generated | 35% |
| Paid for exported power | full retail (net metering) |
| Rooftops sampled here | 10 |
| Google imagery from | 2022 |
Nearby cities
See all of Iowa → statewide sunlight, rates, incentives and every city we've measured.
Iowa City solar questions
How many solar panels do I need in Iowa City?
About 20 panels for an average home. Iowa City roofs get 1,591 usable sun hours a year, so each 400W panel produces roughly 541 kWh annually.
Is solar worth it in Iowa City?
At 13.2¢/kWh and 1,591 sun hours, a typical system pays for itself in about 11.2 years and returns roughly $19,696 over 25 years. That is slower than the national average, so compare quotes carefully.
How much do solar panels cost in Iowa City?
A 8 kW system costs about $22,800 before incentives and $15,960 after the 30% federal tax credit. Prices vary by installer, roof complexity and equipment.
Worth reading before you buy
Estimates only, generated 2026-08-22 from Google Solar API rooftop samples and average Iowa electricity rates. Not a quote and not financial advice. Your roof, usage, utility plan and local incentives will change these numbers — get real quotes before buying.