Solar panels in Duluth, MN
Roofs in Duluth get about 1,349 hours of usable sunlight a year — less than 89% 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 Duluth → City averages are a starting point; your own roof's size, pitch and shading change the answer a lot.
What a typical Duluth solar system costs
A 24-panel system (9.6 kW) is about right for an average Duluth home using 10,800 kWh a year. It would produce roughly 11,008 kWh annually and offset 100% of that usage.
| System | Size | kWh/yr | Net cost | Saves/yr | Payback |
|---|---|---|---|---|---|
| 8 panels | 3.2 kW | 3,669 | $6,384 | $543 | 11.8 yrs |
| 12 panels | 4.8 kW | 5,504 | $9,576 | $815 | 11.8 yrs |
| 16 panels | 6.4 kW | 7,339 | $12,768 | $1,086 | 11.8 yrs |
| 20 panels | 8 kW | 9,173 | $15,960 | $1,358 | 11.8 yrs |
| 26 panels | 10.4 kW | 11,925 | $20,748 | $1,640 | 12.7 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 Duluth gets 1,349 sun hours
That figure comes from Google's analysis of real rooftops across Duluth — 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 Duluth reaches about 1,527 hours, roughly 13% better than typical.
The numbers behind this page
| Typical usable sunlight | 1,349 hrs/yr |
|---|---|
| Unshaded roof | 1,527 hrs/yr |
| Electricity rate (Minnesota avg) | 14.8¢/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 | 34% |
| Paid for exported power | full retail (net metering) |
| Rooftops sampled here | 12 |
| Google imagery from | 2022 |
Nearby cities
See all of Minnesota → statewide sunlight, rates, incentives and every city we've measured.
Duluth solar questions
How many solar panels do I need in Duluth?
About 24 panels for an average home. Duluth roofs get 1,349 usable sun hours a year, so each 400W panel produces roughly 459 kWh annually.
Is solar worth it in Duluth?
At 14.8¢/kWh and 1,349 sun hours, a typical system pays for itself in about 11.9 years and returns roughly $21,000 over 25 years. That is slower than the national average, so compare quotes carefully.
How much do solar panels cost in Duluth?
A 9.6 kW system costs about $27,360 before incentives and $19,152 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 Minnesota 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.