Wind Turbine Payback in Columbia County, AR
Wind turbine payback in Columbia 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 Columbia County, AR averages 3.19 m/s (7.1 mph). A 10 kW turbine there would make about 3,198 kWh a year, worth $439 at AR's 13.74¢/kWh. Against an installed cost of about $100,000, that is a payback of over 100 years, and the turbine is built to last about 20.
What to do in Columbia County
A home turbine is not worth buying for savings in Columbia County unless your spot is far windier than the county average, 8.4 m/s at the hub against 3.19 m/s here. Per kW, solar panels would make about 1,314 kWh a year here against the turbine's 320, so get a solar quote first.
What would have to change
- Power would have to cost 156¢/kWh, 11.4 times what AR pays now.
- Or the average wind at the hub would have to be 8.4 m/s instead of 3.19. A taller tower or an exposed ridge can add some of that; a rooftop never will.
Against the rest of AR
Columbia County is the 2,888th windiest of 3,144 US counties at turbine height; the national middle is 4.79 m/s. The windiest in AR is Mississippi County at 5.35 m/s, payback 49 years.
Month by month in Columbia County
April is the strongest month here, at 3.68 m/s and about 419 kWh. July is the weakest, 2.60 m/s and 133 kWh, so the best month makes 3.2 times the worst. November to March brings in 51% of the year's output in Columbia County.
| Month | Wind at 30 m | Output | Worth |
|---|---|---|---|
| January | 3.37 m/s | 325 kWh | $45 |
| February | 3.47 m/s | 324 kWh | $45 |
| March | 3.61 m/s | 407 kWh | $56 |
| April | 3.68 m/s | 419 kWh | $58 |
| May | 3.28 m/s | 299 kWh | $41 |
| June | 2.85 m/s | 180 kWh | $25 |
| July | 2.60 m/s | 133 kWh | $18 |
| August | 2.63 m/s | 138 kWh | $19 |
| September | 2.90 m/s | 190 kWh | $26 |
| October | 3.17 m/s | 267 kWh | $37 |
| November | 3.39 m/s | 322 kWh | $44 |
| December | 3.33 m/s | 313 kWh | $43 |
What a taller tower would buy
Measured at 10 m the wind in Columbia County averages 1.89 m/s; at 50 m it is 4.07 m/s. That gives a shear exponent of 0.477, typical of rough, sheltered ground: trees or buildings slow the low wind a lot. Going from 20 m to 50 m takes output from 1,631 to 6,934 kWh a year, 325% 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 | 2.63 m/s | 1,631 kWh | over 100 years |
| 30 m | 3.19 m/s | 3,198 kWh | over 100 years |
| 40 m | 3.66 m/s | 4,986 kWh | over 100 years |
| 50 m | 4.07 m/s | 6,934 kWh | over 100 years |
Counties around Columbia County
1 of the 6 closest counties is windier at turbine height; the windiest, Lafayette County, averages 3.39 m/s.
- Lafayette County, AR: 3.39 m/s, 3,905 kWh, payback over 100 years (22 mi)
- Claiborne Parish, LA: 3.19 m/s, 3,198 kWh, payback over 100 years (31 mi)
- Nevada County, AR: 3.11 m/s, 2,938 kWh, payback over 100 years (31 mi)
- Ouachita County, AR: 3.11 m/s, 2,938 kWh, payback over 100 years (33 mi)
- Webster Parish, LA: 3.16 m/s, 3,099 kWh, payback over 100 years (34 mi)
- Union County, AR: 3.05 m/s, 2,751 kWh, payback over 100 years (37 mi)
Sun versus wind in Columbia County
Columbia County gets 4.5 kWh of sunshine per square metre a day on average. One kW of solar panels here would make roughly 1,314 kWh a year; one kW of the turbine above makes 320. Kilowatt for kilowatt, panels make 4.1 times as much here as the turbine. 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.