Wind Turbine Payback in Edwards County, KS
Wind turbine payback in Edwards 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 Edwards County, KS averages 6.68 m/s (14.9 mph). A 10 kW turbine there would make about 24,728 kWh a year, worth $3,774 at KS's 15.26¢/kWh. Against an installed cost of about $100,000, that is a payback of 27 years, and the turbine is built to last about 20.
What to do in Edwards County
A home turbine is not worth buying for savings in Edwards County unless your spot is far windier than the county average, 7.8 m/s at the hub against 6.68 m/s here. Per kW, solar panels would make about 1,416 kWh a year here against the turbine's 2,473, so get a solar quote first.
What would have to change
- Power would have to cost 20¢/kWh, 1.3 times what KS pays now.
- Or the average wind at the hub would have to be 7.8 m/s instead of 6.68. A taller tower or an exposed ridge can add some of that; a rooftop never will.
Against the rest of KS
Edwards County is the 70th windiest of 3,144 US counties at turbine height; the national middle is 4.79 m/s. It is the windiest county in KS.
Month by month in Edwards County
April is the strongest month here, at 7.53 m/s and about 2,524 kWh. August is the weakest, 5.91 m/s and 1,619 kWh, so the best month makes 1.6 times the worst. November to March brings in 41% of the year's output in Edwards County.
| Month | Wind at 30 m | Output | Worth |
|---|---|---|---|
| January | 6.41 m/s | 1,929 kWh | $294 |
| February | 6.57 m/s | 1,834 kWh | $280 |
| March | 7.06 m/s | 2,333 kWh | $356 |
| April | 7.53 m/s | 2,524 kWh | $385 |
| May | 6.79 m/s | 2,169 kWh | $331 |
| June | 6.93 m/s | 2,184 kWh | $333 |
| July | 6.07 m/s | 1,721 kWh | $263 |
| August | 5.91 m/s | 1,619 kWh | $247 |
| September | 6.81 m/s | 2,110 kWh | $322 |
| October | 6.87 m/s | 2,219 kWh | $339 |
| November | 6.81 m/s | 2,110 kWh | $322 |
| December | 6.51 m/s | 1,997 kWh | $305 |
What a taller tower would buy
Measured at 10 m the wind in Edwards County averages 5.28 m/s; at 50 m it is 7.46 m/s. That gives a shear exponent of 0.215, typical of ordinary open country. Going from 20 m to 50 m takes output from 20,639 to 30,263 kWh a year, 47% 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 | 6.13 m/s | 20,639 kWh | 32 years |
| 30 m | 6.68 m/s | 24,758 kWh | 27 years |
| 40 m | 7.11 m/s | 27,830 kWh | 24 years |
| 50 m | 7.46 m/s | 30,263 kWh | 22 years |
Counties around Edwards County
None of the 6 closest counties is windier than Edwards County.
- Pawnee County, KS: 6.68 m/s, 24,728 kWh, payback 27 years (21 mi)
- Kiowa County, KS: 6.6 m/s, 24,142 kWh, payback 27 years (22 mi)
- Stafford County, KS: 6.66 m/s, 24,582 kWh, payback 27 years (34 mi)
- Ford County, KS: 6.58 m/s, 23,996 kWh, payback 27 years (34 mi)
- Pratt County, KS: 6.53 m/s, 23,628 kWh, payback 28 years (35 mi)
- Hodgeman County, KS: 6.66 m/s, 24,582 kWh, payback 27 years (35 mi)
Sun versus wind in Edwards County
Edwards County gets 4.85 kWh of sunshine per square metre a day on average. One kW of solar panels here would make roughly 1,416 kWh a year; one kW of the turbine above makes 2,473. 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.