Rotor Diameter (m): 5.5 Material and number of the blades: Reinforced fiber glass*3 Rated power/maximum power: 5000/6000w Rated wind speed (m/s): 10 Startup wind speed (m/s): 2.5 Working wind speed (m/s): 3~25 Survived wind speed: 50 Rated rotate speed(r/min): 260 Working voltage: DC48V/120V/240V/300V/350V Generator style: Three phase, permanent magnet Charging method: Constant voltage current saving Speed regulation method: Yaw+ Auto brake Weight: 357kg Tower height (m): 12 Suggested battery capacity: 12V/200HA Deep cycle battery 20pcs Life time: 15years. Wooden case.