Wind Turbine Payback in Gadsden County, FL
Wind turbine payback in Gadsden 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 Gadsden County, FL averages 3.01 m/s (6.7 mph). A 10 kW turbine there would make about 2,631 kWh a year, worth $403 at FL's 15.32¢/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 Gadsden County
A home turbine is not worth buying for savings in Gadsden County unless your spot is far windier than the county average, 7.8 m/s at the hub against 3.01 m/s here. Per kW, solar panels would make about 1,396 kWh a year here against the turbine's 263, so get a solar quote first.
What would have to change
- Power would have to cost 190¢/kWh, 12.4 times what FL pays now.
- Or the average wind at the hub would have to be 7.8 m/s instead of 3.01. A taller tower or an exposed ridge can add some of that; a rooftop never will.
Against the rest of FL
Gadsden County is the 3,056th windiest of 3,144 US counties at turbine height; the national middle is 4.79 m/s. The windiest in FL is Brevard County at 5.62 m/s, payback 39 years.
Month by month in Gadsden County
March is the strongest month here, at 3.38 m/s and about 330 kWh. July is the weakest, 2.44 m/s and 104 kWh, so the best month makes 3.2 times the worst. November to March brings in 54% of the year's output in Gadsden County.
| Month | Wind at 30 m | Output | Worth |
|---|---|---|---|
| January | 3.34 m/s | 315 kWh | $48 |
| February | 3.33 m/s | 282 kWh | $43 |
| March | 3.38 m/s | 330 kWh | $51 |
| April | 3.27 m/s | 287 kWh | $44 |
| May | 2.92 m/s | 201 kWh | $31 |
| June | 2.54 m/s | 118 kWh | $18 |
| July | 2.44 m/s | 104 kWh | $16 |
| August | 2.46 m/s | 108 kWh | $17 |
| September | 2.89 m/s | 187 kWh | $29 |
| October | 3.12 m/s | 251 kWh | $38 |
| November | 3.27 m/s | 284 kWh | $44 |
| December | 3.26 m/s | 291 kWh | $45 |
What a taller tower would buy
Measured at 10 m the wind in Gadsden County averages 1.81 m/s; at 50 m it is 3.82 m/s. That gives a shear exponent of 0.464, typical of rough, sheltered ground: trees or buildings slow the low wind a lot. Going from 20 m to 50 m takes output from 1,345 to 5,707 kWh a year, 324% 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 | 2.5 m/s | 1,345 kWh | over 100 years |
| 30 m | 3.01 m/s | 2,642 kWh | over 100 years |
| 40 m | 3.44 m/s | 4,111 kWh | over 100 years |
| 50 m | 3.82 m/s | 5,707 kWh | over 100 years |
Counties around Gadsden County
5 of the 6 closest counties are windier at turbine height; the windiest, Seminole County, averages 4.4 m/s.
- Decatur County, GA: 3.91 m/s, 6,134 kWh, payback over 100 years (21 mi)
- Leon County, FL: 3.01 m/s, 2,631 kWh, payback over 100 years (22 mi)
- Liberty County, FL: 3.33 m/s, 3,684 kWh, payback over 100 years (27 mi)
- Seminole County, GA: 4.4 m/s, 8,748 kWh, payback 74 years (29 mi)
- Grady County, GA: 3.91 m/s, 6,134 kWh, payback over 100 years (30 mi)
- Wakulla County, FL: 3.88 m/s, 5,989 kWh, payback over 100 years (37 mi)
Sun versus wind in Gadsden County
Gadsden County gets 4.78 kWh of sunshine per square metre a day on average. One kW of solar panels here would make roughly 1,396 kWh a year; one kW of the turbine above makes 263. Kilowatt for kilowatt, panels make 5.3 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.