PARAMETER VERTICAL WIND TURBINE MODEL NUMBER WKV-300 Rated Power 300w Size(Height / Diameter) 1.2/1.06 Blades Material aluminum alloy Start-up Wind Speed 1m/s Minimum Power Generation Wind Speed 2m/s Cut-in wind speed 2m/s Rated Wind Speed 12m/s Cut out Wind Speed 15m/s Survival Wind Speed 65m/s Generator Type AC, 3 phases Controller Output Voltage 12\24V Controller Braking System 3-Phase short circuit by NFB brake Ambient Temperature . -30C more information please contact me by emai benny@windwingcn.com