Wind Turbine Payback in Naugatuck Valley Planning Region, CT
Wind turbine payback in Naugatuck Valley Planning Region
No. The turbine wears out before it pays for itself.
At 30 m, the height a home turbine tower usually reaches, the wind in Naugatuck Valley Planning Region, CT averages 3.65 m/s (8.2 mph). A 10 kW turbine there would make about 4,948 kWh a year, worth $1,359 at CT's 27.47¢/kWh. Against an installed cost of about $100,000, that is a payback of 74 years, and the turbine is built to last about 20.
What to do in Naugatuck Valley Planning Region
A home turbine is not worth buying for savings in Naugatuck Valley Planning Region unless your spot is far windier than the county average, 5.8 m/s at the hub against 3.65 m/s here. Per kW, solar panels would make about 1,130 kWh a year here against the turbine's 495, so get a solar quote first.
What would have to change
- Power would have to cost 101¢/kWh, 3.7 times what CT pays now.
- Or the average wind at the hub would have to be 5.8 m/s instead of 3.65. A taller tower or an exposed ridge can add some of that; a rooftop never will.
Against the rest of CT
Naugatuck Valley Planning Region is the 2,332nd windiest of 3,144 US counties at turbine height; the national middle is 4.79 m/s. The windiest in CT is Greater Bridgeport Planning Region at 5.26 m/s, payback 25 years.
Month by month in Naugatuck Valley Planning Region
March is the strongest month here, at 4.36 m/s and about 721 kWh. August is the weakest, 2.88 m/s and 193 kWh, so the best month makes 3.7 times the worst. November to March brings in 61% of the year's output in Naugatuck Valley Planning Region.
| Month | Wind at 30 m | Output | Worth |
|---|---|---|---|
| January | 4.35 m/s | 717 kWh | $197 |
| February | 4.49 m/s | 713 kWh | $196 |
| March | 4.36 m/s | 721 kWh | $198 |
| April | 3.91 m/s | 502 kWh | $138 |
| May | 3.27 m/s | 295 kWh | $81 |
| June | 2.99 m/s | 211 kWh | $58 |
| July | 2.90 m/s | 197 kWh | $54 |
| August | 2.88 m/s | 193 kWh | $53 |
| September | 3.14 m/s | 250 kWh | $69 |
| October | 3.62 m/s | 411 kWh | $113 |
| November | 3.85 m/s | 480 kWh | $132 |
| December | 4.10 m/s | 601 kWh | $165 |
What a taller tower would buy
Measured at 10 m the wind in Naugatuck Valley Planning Region averages 2.28 m/s; at 50 m it is 4.54 m/s. That gives a shear exponent of 0.428, typical of rough, sheltered ground: trees or buildings slow the low wind a lot. Going from 20 m to 50 m takes output from 2,804 to 9,580 kWh a year, 242% 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 | 3.07 m/s | 2,804 kWh | over 100 years |
| 30 m | 3.65 m/s | 4,941 kWh | 74 years |
| 40 m | 4.13 m/s | 7,229 kWh | 50 years |
| 50 m | 4.54 m/s | 9,580 kWh | 38 years |
Counties around Naugatuck Valley Planning Region
2 of the 6 closest counties are windier at turbine height; the windiest, Greater Bridgeport Planning Region, averages 5.26 m/s.
- South Central Connecticut Planning Region, CT: 3.65 m/s, 4,948 kWh, payback 74 years (20 mi)
- Greater Bridgeport Planning Region, CT: 5.26 m/s, 14,327 kWh, payback 25 years (24 mi)
- Northwest Hills Planning Region, CT: 3.53 m/s, 4,449 kWh, payback 82 years (24 mi)
- Western Connecticut Planning Region, CT: 3.47 m/s, 4,211 kWh, payback 87 years (25 mi)
- Lower Connecticut River Valley Planning Region, CT: 3.85 m/s, 5,847 kWh, payback 62 years (32 mi)
- Capitol Planning Region, CT: 3.52 m/s, 4,408 kWh, payback 83 years (34 mi)
Sun versus wind in Naugatuck Valley Planning Region
Naugatuck Valley Planning Region 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 495. 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.