Wind Turbine Payback in Republic County, KS
Wind turbine payback in Republic 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 Republic County, KS averages 6.38 m/s (14.3 mph). A 10 kW turbine there would make about 22,521 kWh a year, worth $3,437 at KS's 15.26¢/kWh. Against an installed cost of about $100,000, that is a payback of 29 years, and the turbine is built to last about 20.
What to do in Republic County
A home turbine is not worth buying for savings in Republic County unless your spot is far windier than the county average, 7.8 m/s at the hub against 6.38 m/s here. Per kW, solar panels would make about 1,305 kWh a year here against the turbine's 2,252, so get a solar quote first.
What would have to change
- Power would have to cost 22¢/kWh, 1.5 times what KS pays now.
- Or the average wind at the hub would have to be 7.8 m/s instead of 6.38. A taller tower or an exposed ridge can add some of that; a rooftop never will.
Against the rest of KS
Republic County is the 359th windiest of 3,144 US counties at turbine height; the national middle is 4.79 m/s. The windiest in KS is Edwards County at 6.68 m/s, payback 27 years.
Month by month in Republic County
April is the strongest month here, at 7.27 m/s and about 2,381 kWh. August is the weakest, 5.29 m/s and 1,236 kWh, so the best month makes 1.9 times the worst. November to March brings in 44% of the year's output in Republic County.
| Month | Wind at 30 m | Output | Worth |
|---|---|---|---|
| January | 6.42 m/s | 1,935 kWh | $295 |
| February | 6.45 m/s | 1,768 kWh | $270 |
| March | 6.91 m/s | 2,240 kWh | $342 |
| April | 7.27 m/s | 2,381 kWh | $363 |
| May | 6.56 m/s | 2,025 kWh | $309 |
| June | 6.31 m/s | 1,808 kWh | $276 |
| July | 5.43 m/s | 1,316 kWh | $201 |
| August | 5.29 m/s | 1,236 kWh | $189 |
| September | 6.33 m/s | 1,819 kWh | $278 |
| October | 6.66 m/s | 2,086 kWh | $318 |
| November | 6.69 m/s | 2,040 kWh | $311 |
| December | 6.33 m/s | 1,879 kWh | $287 |
What a taller tower would buy
Measured at 10 m the wind in Republic County averages 4.99 m/s; at 50 m it is 7.15 m/s. That gives a shear exponent of 0.223, typical of ordinary open country. Going from 20 m to 50 m takes output from 18,437 to 28,109 kWh a year, 52% 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 | 5.83 m/s | 18,437 kWh | 36 years |
| 30 m | 6.38 m/s | 22,522 kWh | 29 years |
| 40 m | 6.8 m/s | 25,623 kWh | 26 years |
| 50 m | 7.15 m/s | 28,109 kWh | 23 years |
Counties around Republic County
2 of the 6 closest counties are windier at turbine height; the windiest, Jewell County, averages 6.4 m/s.
- Cloud County, KS: 6.29 m/s, 21,855 kWh, payback 30 years (24 mi)
- Thayer County, NE: 6.38 m/s, 22,521 kWh, payback 34 years (24 mi)
- Washington County, KS: 6.36 m/s, 22,373 kWh, payback 29 years (30 mi)
- Jewell County, KS: 6.4 m/s, 22,669 kWh, payback 29 years (31 mi)
- Nuckolls County, NE: 6.4 m/s, 22,669 kWh, payback 34 years (32 mi)
- Jefferson County, NE: 6.36 m/s, 22,373 kWh, payback 35 years (36 mi)
Sun versus wind in Republic County
Republic County gets 4.47 kWh of sunshine per square metre a day on average. One kW of solar panels here would make roughly 1,305 kWh a year; one kW of the turbine above makes 2,252. This is one of the rare places where a kilowatt of turbine out-produces a kilowatt of panels, by 1.7 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.