... life (15-20 years) -- CE Working Condition:The diameter of wind wheel: 4.2mBlades number: 9Blades length: 3600mmRated rotate speed: 50 ... vertical axle start up by breeze,the advanced "C"type blades,exert the "wind force theory" completely,flexible "wind hole"device,make the wind energy ... color TV, lighting, electric fan, charger etc.Power diagram: V vertical axis wind turbine 10kw