Wind Turbine Payback in Putnam County, NY
Wind turbine payback in Putnam 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 Putnam County, NY averages 3.47 m/s (7.8 mph). A 10 kW turbine there would make about 4,211 kWh a year, worth $1,232 at NY's 29.26¢/kWh. Against an installed cost of about $100,000, that is a payback of 81 years, and the turbine is built to last about 20.
What to do in Putnam County
A home turbine is not worth buying for savings in Putnam County unless your spot is far windier than the county average, 5.6 m/s at the hub against 3.47 m/s here. Per kW, solar panels would make about 1,130 kWh a year here against the turbine's 421, so get a solar quote first.
What would have to change
- Power would have to cost 119¢/kWh, 4.1 times what NY pays now.
- Or the average wind at the hub would have to be 5.6 m/s instead of 3.47. A taller tower or an exposed ridge can add some of that; a rooftop never will.
Against the rest of NY
Putnam County is the 2,548th windiest of 3,144 US counties at turbine height; the national middle is 4.79 m/s. The windiest in NY is Niagara County at 6.87 m/s, payback 13 years.
Month by month in Putnam County
March is the strongest month here, at 4.19 m/s and about 641 kWh. August is the weakest, 2.75 m/s and 162 kWh, so the best month makes 4.0 times the worst. November to March brings in 60% of the year's output in Putnam County.
| Month | Wind at 30 m | Output | Worth |
|---|---|---|---|
| January | 4.07 m/s | 591 kWh | $173 |
| February | 4.26 m/s | 609 kWh | $178 |
| March | 4.19 m/s | 641 kWh | $188 |
| April | 3.79 m/s | 456 kWh | $133 |
| May | 3.17 m/s | 266 kWh | $78 |
| June | 2.88 m/s | 186 kWh | $54 |
| July | 2.79 m/s | 171 kWh | $50 |
| August | 2.75 m/s | 162 kWh | $47 |
| September | 3.00 m/s | 214 kWh | $63 |
| October | 3.43 m/s | 343 kWh | $100 |
| November | 3.63 m/s | 398 kWh | $116 |
| December | 3.84 m/s | 493 kWh | $144 |
What a taller tower would buy
Measured at 10 m the wind in Putnam County averages 2.15 m/s; at 50 m it is 4.34 m/s. That gives a shear exponent of 0.436, typical of rough, sheltered ground: trees or buildings slow the low wind a lot. Going from 20 m to 50 m takes output from 2,344 to 8,403 kWh a year, 258% 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 | 2.91 m/s | 2,344 kWh | over 100 years |
| 30 m | 3.47 m/s | 4,224 kWh | 81 years |
| 40 m | 3.94 m/s | 6,268 kWh | 55 years |
| 50 m | 4.34 m/s | 8,403 kWh | 41 years |
Counties around Putnam County
3 of the 6 closest counties are windier at turbine height; the windiest, Greater Bridgeport Planning Region, averages 5.26 m/s.
- Western Connecticut Planning Region, CT: 3.47 m/s, 4,211 kWh, payback 87 years (19 mi)
- Westchester County, NY: 4.5 m/s, 9,339 kWh, payback 37 years (19 mi)
- Dutchess County, NY: 3.37 m/s, 3,830 kWh, payback 89 years (23 mi)
- Rockland County, NY: 4.5 m/s, 9,339 kWh, payback 37 years (24 mi)
- Orange County, NY: 3.47 m/s, 4,211 kWh, payback 81 years (29 mi)
- Greater Bridgeport Planning Region, CT: 5.26 m/s, 14,327 kWh, payback 25 years (32 mi)
Sun versus wind in Putnam County
Putnam County gets 3.87 kWh of sunshine per square metre a day on average. One kW of solar panels here would make roughly 1,130 kWh a year; one kW of the turbine above makes 421. Kilowatt for kilowatt, panels make 2.7 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.