Rotor diameter: 12.35m Blades quantity: 3pcs Direction: always downwind Blades material: Carbon fiber reinforced plastic Rated output Power: 20KW Power supplied to Grid 24KW [in 5seconds] working voltage: DC360V/500V,AC220V/380V Annual average energy production: 50MWH (in rate 5m/s wind speed) working wind speed: 3-35m/s Initial wind speed: 2.0m/s Nominal wind speed: 9.0m/s30.3mph Storm-stand: up to 55m/s Max rotate speed: 120r/min Wind turbine type: Three-phase, PMG Alternator Working temperature: from -40 to +60 C Blade Pitch Control Variable Pitch Over-speed Protection Aerodynamic brake + Electromechanical disc brake Speed Regulate and Shut Down Methods Auto-Yawing, Positive Pitch and Electric Magnet Switch. Gearbox: None, Direct Drive Battery charge time: SENWEI-