1,start-up 1m/s,cut-in 2.5m/s,high efficiency 2,magnetic levitation 3,safety, little vibration and noise 4,CE,ISO,Patents vertical axis wind turbine specification: Item/ModelVH-300WVH-500WVH-1KWVH-2KWVH-3KWRated Power(W)300500100020003000Rotor Diameter (m)1.21.41.752.63.5Blade Length (m)1.41.51.82.63.8Setup Speed (m/s)222.52.52.5Rated Speed(m/s)8881010Working Speed (m/s)2.5-252.5-253-253-253- ...