Rotor diameter: 3.5m Blades quantity: 3pcs Direction: always upwind Blades material: Glass fiber reinforced plastic Rated output power: 2000W Maximum output power: 2950W working voltage: DC24/36/48/96/120/240V,AC220V Annual average energy production: 4672KWH (in rate 5m/s wind speed) working wind speed: 3-25m/s Initial wind speed: 2.5m/s Nominal wind speed: 8.0m/s17.8mph Storm-stand: up to 50m/s Max rotate speed: 400r/min Wind turbine type: Three-phase, PMG Alternator Working temperature: from -40 to +60 C Blade Pitch Control Fixed Pitch- Over Speed Protection Auto-furl Speed regulation methods: Yawing and electrical magnet switch Stop Methods Manual Brake + Hydraulic Brake Gearbox: None, Direct Drive Batttery full charge time: about 8 hours