Specifications(20kW) Type: 3 Blade Upwind Rotor Diameter: 10 m Start-up Wind Speed: 2.5 m/s (5.6 mph) Cut-in Wind Speed: 3 m/s (6.7mph) Rated Wind Speed: 12m/s (26.8mph) Rated Power: 20k Watts Maximum Power: ~ 25k Watts Cut-Out Wind Speed: 18m/s(40.1mph) Timing manner: automatically adjust the windward angle Overspeed Protection: Auto Furl Temperature Range: -40 to +60 Deg. C (-40 to +140 Deg. F) Generator: Permanent Magnet Alternator Output Form: 420VDC Nominal