A wind turbine is a rotary device that extracts energy from the wind. If the mechanical energy is used directly by machinery, such as for pumping water, cutting lumber or grinding stones, the machine is called a windmill.
If the mechanical energy is instead converted to electricity, the machine is called a wind turbine generator.
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 TALON5 GRID TIE 5KW 240V Wind Generator Turbine System $17,312.86 |
 TALON5 5KW 240V Off Grid Wind Generator Turbine System $15,294.28 |
 3KW WIND TURBINE WIND GENERATOR + INVERTER CONTROLLER $2,999.00 |
 Whisper 100 Wind Turbine Generator 100 kWh mo NEW $2,875.00 |
 3KW WIND GENERATOR TURBINE 48V $2,199.99 |
Wind turbine generators are also called wind generator, wind turbine, wind turbine, wind power unit (WPU), wind energy converter (WEC), or aerogenerator.
Small wind turbines may be as small as a fifty-watt generator for boat or caravan use. Small units often have direct drive generators, direct current output, aeroelastic blades, lifetime bearings and use a vane to point into the wind. Larger, more costly turbines generally have geared power trains, alternating current output, flaps and are actively pointed into the wind. Direct drive generators and aeroelastic blades for large wind turbines are being researched.