Wind Turbine Payback in Beltrami County, MN
Wind turbine payback in Beltrami County
No. The turbine wears out before it pays for itself.
At 30 m, the height a home turbine tower usually reaches, the wind in Beltrami County, MN averages 6.25 m/s (14 mph). A 10 kW turbine there would make about 21,558 kWh a year, worth $3,544 at MN's 16.44¢/kWh. Against an installed cost of about $100,000, that is a payback of 28 years, and the turbine is built to last about 20.
What to do in Beltrami County
A home turbine is not worth buying for savings in Beltrami County unless your spot is far windier than the county average, 7.5 m/s at the hub against 6.25 m/s here. Per kW, solar panels would make about 1,083 kWh a year here against the turbine's 2,156, so get a solar quote first.
What would have to change
- Power would have to cost 23¢/kWh, 1.4 times what MN pays now.
- Or the average wind at the hub would have to be 7.5 m/s instead of 6.25. A taller tower or an exposed ridge can add some of that; a rooftop never will.
Against the rest of MN
Beltrami County is the 528th windiest of 3,144 US counties at turbine height; the national middle is 4.79 m/s. The windiest in MN is Lincoln County at 6.68 m/s, payback 25 years.
Month by month in Beltrami County
October is the strongest month here, at 6.62 m/s and about 2,062 kWh. July is the weakest, 5.66 m/s and 1,462 kWh, so the best month makes 1.4 times the worst. November to March brings in 42% of the year's output in Beltrami County.
| Month | Wind at 30 m | Output | Worth |
|---|---|---|---|
| January | 6.23 m/s | 1,816 kWh | $299 |
| February | 6.26 m/s | 1,661 kWh | $273 |
| March | 6.42 m/s | 1,936 kWh | $318 |
| April | 6.68 m/s | 2,033 kWh | $334 |
| May | 6.44 m/s | 1,948 kWh | $320 |
| June | 6.09 m/s | 1,674 kWh | $275 |
| July | 5.66 m/s | 1,462 kWh | $240 |
| August | 5.76 m/s | 1,524 kWh | $251 |
| September | 6.47 m/s | 1,907 kWh | $314 |
| October | 6.62 m/s | 2,062 kWh | $339 |
| November | 6.43 m/s | 1,879 kWh | $309 |
| December | 6.02 m/s | 1,684 kWh | $277 |
What a taller tower would buy
Measured at 10 m the wind in Beltrami County averages 5.11 m/s; at 50 m it is 6.87 m/s. That gives a shear exponent of 0.184, typical of ordinary open country. Going from 20 m to 50 m takes output from 18,257 to 26,109 kWh a year, 43% more, before counting the extra cost of the taller tower. Why tower height decides it explains the shear behind these numbers.
| Hub height | Average wind | Output | Payback |
|---|---|---|---|
| 20 m | 5.8 m/s | 18,257 kWh | 33 years |
| 30 m | 6.25 m/s | 21,586 kWh | 28 years |
| 40 m | 6.59 m/s | 24,096 kWh | 25 years |
| 50 m | 6.87 m/s | 26,109 kWh | 23 years |
Counties around Beltrami County
5 of the 6 closest counties are windier at turbine height; the windiest, Clearwater County, averages 6.56 m/s.
- Clearwater County, MN: 6.56 m/s, 23,849 kWh, payback 26 years (27 mi)
- Pennington County, MN: 6.34 m/s, 22,225 kWh, payback 27 years (50 mi)
- Red Lake County, MN: 6.34 m/s, 22,225 kWh, payback 27 years (50 mi)
- Mahnomen County, MN: 6.56 m/s, 23,849 kWh, payback 26 years (53 mi)
- Hubbard County, MN: 6.51 m/s, 23,481 kWh, payback 26 years (54 mi)
- Lake of the Woods County, MN: 5.51 m/s, 16,109 kWh, payback 38 years (62 mi)
Sun versus wind in Beltrami County
Beltrami County gets 3.71 kWh of sunshine per square metre a day on average. One kW of solar panels here would make roughly 1,083 kWh a year; one kW of the turbine above makes 2,156. This is one of the rare places where a kilowatt of turbine out-produces a kilowatt of panels, by 2.0 times. Panel output assumes an 80% system performance ratio. Wind or solar runs the same comparison for every county.
How this is worked out
Wind is NASA's Power climate record, the 2001-2025 average at 10 m and 50 m for the county's centre, carried to 30 m with this county's own measured wind shear and spread into hours with a Rayleigh distribution. The turbine is a generic 10 kW, 7 m rotor machine with 10% losses. Cost is $10,000 per kW installed with no tax credit, because the federal one ended in 2025. One county-centre number cannot see your hilltop or your tree line, so treat it as the starting point for a site survey, not a substitute. The full method and its weak spots are in how the numbers are made.