Rated output power 500w Class of insulation B Max. output power 600w Body material 20# seamless steel tube Rotor diameter 2.7m Magnet steel NdFeB38sh Max. start torque ï ¼  œ 0.3 n/ m Stator QZY-2/ 180/ 470 Rated R.P.M 400r/ min Corrosion prevention Galvanization, paint Rated wind speed 7( m/ s) Blade 3 FRP blades Start wind speed 2.5( m/ s) Over speed protection Automatic yaw, electromagnetic protection Working wind speed 3-25( m/ s) Suggest battery 12v150ah* 2pcs Survive wind speed 40( m/ s) Service life 15years Ideal wind speed 4-12( m/ s) Load appliances TV, lightings, electric fan, computer, electric power tools under 300 watts, etc; Output voltage 24v Working temperature -40 -- + 60â  „  ƒ Cable tower height 6m Weight 45kgs Control system Controller, inverter