Wind Turbine Payback in Santa Rosa County, FL
Wind turbine payback in Santa Rosa 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 Santa Rosa County, FL averages 4.82 m/s (10.8 mph). A 10 kW turbine there would make about 11,341 kWh a year, worth $1,738 at FL's 15.32¢/kWh. Against an installed cost of about $100,000, that is a payback of 58 years, and the turbine is built to last about 20.
What to do in Santa Rosa County
A home turbine is not worth buying for savings in Santa Rosa County unless your spot is far windier than the county average, 7.8 m/s at the hub against 4.82 m/s here. Per kW, solar panels would make about 1,431 kWh a year here against the turbine's 1,134, so get a solar quote first.
What would have to change
- Power would have to cost 44¢/kWh, 2.9 times what FL pays now.
- Or the average wind at the hub would have to be 7.8 m/s instead of 4.82. A taller tower or an exposed ridge can add some of that; a rooftop never will.
Against the rest of FL
Santa Rosa County is the 1,546th 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 Santa Rosa County
January is the strongest month here, at 5.64 m/s and about 1,446 kWh. July is the weakest, 3.74 m/s and 455 kWh, so the best month makes 3.2 times the worst. November to March brings in 56% of the year's output in Santa Rosa County.
| Month | Wind at 30 m | Output | Worth |
|---|---|---|---|
| January | 5.64 m/s | 1,446 kWh | $222 |
| February | 5.52 m/s | 1,240 kWh | $190 |
| March | 5.44 m/s | 1,323 kWh | $203 |
| April | 5.16 m/s | 1,123 kWh | $172 |
| May | 4.48 m/s | 781 kWh | $120 |
| June | 3.91 m/s | 506 kWh | $78 |
| July | 3.74 m/s | 455 kWh | $70 |
| August | 3.75 m/s | 458 kWh | $70 |
| September | 4.48 m/s | 756 kWh | $116 |
| October | 4.95 m/s | 1,035 kWh | $159 |
| November | 5.35 m/s | 1,228 kWh | $188 |
| December | 5.53 m/s | 1,379 kWh | $211 |
What a taller tower would buy
Measured at 10 m the wind in Santa Rosa County averages 3.9 m/s; at 50 m it is 5.32 m/s. That gives a shear exponent of 0.193, typical of ordinary open country. Going from 20 m to 50 m takes output from 9,087 to 14,750 kWh a year, 62% 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 | 4.46 m/s | 9,087 kWh | 72 years |
| 30 m | 4.82 m/s | 11,345 kWh | 58 years |
| 40 m | 5.1 m/s | 13,186 kWh | 50 years |
| 50 m | 5.32 m/s | 14,750 kWh | 44 years |
Counties around Santa Rosa County
None of the 6 closest counties is windier than Santa Rosa County.
- Escambia County, FL: 4.33 m/s, 8,346 kWh, payback 78 years (21 mi)
- Okaloosa County, FL: 4.82 m/s, 11,341 kWh, payback 58 years (26 mi)
- Escambia County, AL: 3.47 m/s, 4,211 kWh, payback over 100 years (32 mi)
- Baldwin County, AL: 4.33 m/s, 8,346 kWh, payback 73 years (43 mi)
- Walton County, FL: 4.38 m/s, 8,632 kWh, payback 76 years (51 mi)
- Covington County, AL: 3.69 m/s, 5,121 kWh, payback over 100 years (52 mi)
Sun versus wind in Santa Rosa County
Santa Rosa County gets 4.9 kWh of sunshine per square metre a day on average. One kW of solar panels here would make roughly 1,431 kWh a year; one kW of the turbine above makes 1,134. Kilowatt for kilowatt, panels make 1.3 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.