Rated output power 50kw Class of insulation B Max. output power 55kw Body material cast iron Rotor diameter 12m Magnet steel NdFeB38sh Max. start torque Stator QZY-2/ 180/ 470 Rated speed 200r/ min Corrosion prevention Galvanization, paint Rated wind speed 12( m/ s) Blade 3 FRP blades Start wind speed 3( m/ s) Over speed protection Mechanical brake , electromagnetic brake , yaw regulating Working wind speed 3-30( m/ s) Suggest battery 12v200ah* 60pcs Survive wind speed 50( m/ s) Service life 15years Ideal wind speed 4-15( m/ s) Cable tower height 20m Output voltage DC460v Weight 2900kg