Wind Turbine Payback in Gulf County, FL
Wind turbine payback in Gulf 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 Gulf County, FL averages 3.94 m/s (8.8 mph). A 10 kW turbine there would make about 6,280 kWh a year, worth $962 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 Gulf County
A home turbine is not worth buying for savings in Gulf County unless your spot is far windier than the county average, 7.8 m/s at the hub against 3.94 m/s here. Per kW, solar panels would make about 1,437 kWh a year here against the turbine's 628, so get a solar quote first.
What would have to change
- Power would have to cost 80¢/kWh, 5.2 times what FL pays now.
- Or the average wind at the hub would have to be 7.8 m/s instead of 3.94. A taller tower or an exposed ridge can add some of that; a rooftop never will.
Against the rest of FL
Gulf County is the 2,096th 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 Gulf County
January is the strongest month here, at 4.48 m/s and about 781 kWh. August is the weakest, 3.23 m/s and 284 kWh, so the best month makes 2.8 times the worst. November to March brings in 55% of the year's output in Gulf County.
| Month | Wind at 30 m | Output | Worth |
|---|---|---|---|
| January | 4.48 m/s | 781 kWh | $120 |
| February | 4.40 m/s | 670 kWh | $103 |
| March | 4.42 m/s | 751 kWh | $115 |
| April | 4.23 m/s | 639 kWh | $98 |
| May | 3.73 m/s | 450 kWh | $69 |
| June | 3.36 m/s | 313 kWh | $48 |
| July | 3.23 m/s | 284 kWh | $44 |
| August | 3.23 m/s | 284 kWh | $44 |
| September | 3.67 m/s | 414 kWh | $63 |
| October | 3.98 m/s | 550 kWh | $84 |
| November | 4.25 m/s | 650 kWh | $100 |
| December | 4.37 m/s | 730 kWh | $112 |
What a taller tower would buy
Measured at 10 m the wind in Gulf County averages 2.82 m/s; at 50 m it is 4.61 m/s. That gives a shear exponent of 0.305, typical of rough, sheltered ground: trees or buildings slow the low wind a lot. Going from 20 m to 50 m takes output from 4,273 to 10,008 kWh a year, 134% 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 | 3.49 m/s | 4,273 kWh | over 100 years |
| 30 m | 3.94 m/s | 6,304 kWh | over 100 years |
| 40 m | 4.31 m/s | 8,214 kWh | 80 years |
| 50 m | 4.61 m/s | 10,008 kWh | 65 years |
Counties around Gulf County
3 of the 6 closest counties are windier at turbine height; the windiest, Franklin County, averages 5.6 m/s.
- Bay County, FL: 5.21 m/s, 13,976 kWh, payback 47 years (26 mi)
- Franklin County, FL: 5.6 m/s, 16,762 kWh, payback 39 years (30 mi)
- Liberty County, FL: 3.33 m/s, 3,684 kWh, payback over 100 years (37 mi)
- Calhoun County, FL: 3.33 m/s, 3,684 kWh, payback over 100 years (37 mi)
- Washington County, FL: 4.33 m/s, 8,346 kWh, payback 78 years (56 mi)
- Wakulla County, FL: 3.88 m/s, 5,989 kWh, payback over 100 years (57 mi)
Sun versus wind in Gulf County
Gulf County gets 4.92 kWh of sunshine per square metre a day on average. One kW of solar panels here would make roughly 1,437 kWh a year; one kW of the turbine above makes 628. Kilowatt for kilowatt, panels make 2.3 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.