1,20 years lifespan . 2, start-up wind speed in 2-3m/s 3,Worm and worm ... low starting technique, low start-up wind speed(2-3m/s) and low cut-in wind speed(3m/s)Magnetic saturation generator ... are in good angle to make sure the start-up wind speed in 2-3m/s.NSK Bearing from Japan which ... 240V3.Rotor diameter: 8m4.Start-up wind speed: 2m/s5.Cut-in wind speed: 3m/s6.Rated wind speed: 12m/s7.Furing type: ...