Wind Turbine Payback in Western Connecticut Planning Region, CT
Wind turbine payback in Western Connecticut 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 Western Connecticut Planning Region, CT averages 3.47 m/s (7.8 mph). A 10 kW turbine there would make about 4,211 kWh a year, worth $1,157 at CT's 27.47¢/kWh. Against an installed cost of about $100,000, that is a payback of 87 years, and the turbine is built to last about 20.
What to do in Western Connecticut Planning Region
A home turbine is not worth buying for savings in Western Connecticut Planning Region unless your spot is far windier than the county average, 5.8 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, 4.3 times what CT pays now.
- Or the average wind at the hub would have to be 5.8 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 CT
Western Connecticut Planning Region is the 2,548th 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 Western Connecticut Planning Region
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 Western Connecticut Planning Region.
| Month | Wind at 30 m | Output | Worth |
|---|---|---|---|
| January | 4.07 m/s | 591 kWh | $162 |
| February | 4.26 m/s | 609 kWh | $167 |
| March | 4.19 m/s | 641 kWh | $176 |
| April | 3.79 m/s | 456 kWh | $125 |
| May | 3.17 m/s | 266 kWh | $73 |
| June | 2.88 m/s | 186 kWh | $51 |
| July | 2.79 m/s | 171 kWh | $47 |
| August | 2.75 m/s | 162 kWh | $45 |
| September | 3.00 m/s | 214 kWh | $59 |
| October | 3.43 m/s | 343 kWh | $94 |
| November | 3.63 m/s | 398 kWh | $109 |
| December | 3.84 m/s | 493 kWh | $135 |
What a taller tower would buy
Measured at 10 m the wind in Western Connecticut Planning Region 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 | 86 years |
| 40 m | 3.94 m/s | 6,268 kWh | 58 years |
| 50 m | 4.34 m/s | 8,403 kWh | 43 years |
Counties around Western Connecticut Planning Region
5 of the 6 closest counties are windier at turbine height; the windiest, Greater Bridgeport Planning Region, averages 5.26 m/s.
- Greater Bridgeport Planning Region, CT: 5.26 m/s, 14,327 kWh, payback 25 years (14 mi)
- Westchester County, NY: 4.5 m/s, 9,339 kWh, payback 37 years (18 mi)
- Putnam County, NY: 3.47 m/s, 4,211 kWh, payback 81 years (19 mi)
- Naugatuck Valley Planning Region, CT: 3.65 m/s, 4,948 kWh, payback 74 years (25 mi)
- Rockland County, NY: 4.5 m/s, 9,339 kWh, payback 37 years (31 mi)
- South Central Connecticut Planning Region, CT: 3.65 m/s, 4,948 kWh, payback 74 years (32 mi)
Sun versus wind in Western Connecticut Planning Region
Western Connecticut 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 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.