Great Rock Windpower
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Wind Turbine Comparison Chart
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| Maker | A.R.E. |
Southwest Windpower | Endurance Windpower | Eoltec | Entegrity |
| Model | ARE 110 |
Skystream | Endurance S250 | Scirocco | EW50 |
| Rotor Diameter | 12' |
12' | 18' | 18' | 50' |
Inverter Life expectancy less than 20 years |
SMA
Windy Boy |
Built in to Nacelle | No inverter necessary | Power-One Aurora | No inverter necessary |
| High wind protection | Side
Furl and Dynamic Braking |
Dynamic Braking only | Stall control constant speed and disk brake on rotor | Passive blade pitch control | Tip Brake Parking Brake for Servicing |
| Wind Swept Area | 110 ft² |
116 ft² | 256 ft² | 265 ft² | 1902 ft² |
| Estimated Monthly Production @12/mph average windspeed on a 100' tower with 35' trees |
370 kWh Estimated |
225 kWh Estimated |
650 kWh |
750 kWh Estimated |
5000 kWh Estimated |
These production numbers represent predicted turbine performance. Performance at your site and with varying tower heights will be different. Production will likely be higher in winter months and lower in summer months. |
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Turbine
with 105' tower* |
$24,000 |
$15,000 | $33,500 | $37,500 | $150,000 |
Shipping & MTC Turnkey Installation** |
16,000 |
15,000 | 20,000 | 21,000 | 75,000 |
MTC Rebate Example max |
$9,200 |
$8,400 | $17,200 | $22,800 | $40,000 |
| Stae and Federal Tax credit s*** | $13,000 |
$10,000 | $16,050 | $18550 | $77,500 |
| Cost after rebate and tax credits | $17,800 |
$11,600 | $19,250 | $17,150 | $116,500 |
Cost per kWh over 20 years |
.20 |
.21 | .12 | .10 | .10 |
| Maintenance | Annual Inspection |
Annual Inspection | Annual Lubrication and inspection | Annual Lubrication and inspection | Annual Lubrication and inspection |
* Includes required monitoring equipment for MTC rebate, all prices subject to change
** Includes estimated shipping. Prices will vary according to site conditions.
***Please consult your accountants as to your actual tax credit
