Product Description Numbers of blade(P): 3 Materials of blade: 1.2 cold-rolled iron Diameter of wind turbines(m): 2.8 Out-in(start)wind speed: 3.5 Out-out(outage)wind speed: 25 Rated wind speed(m/s): 8 Rated speed(rotate/minute): 350 Max. wind speed(m/s): 40 Wind energy ratio(%): 0.41 Generator: Permanent magnetic generator Generator rated power(W): 500 Max.output power(W): 750 Output voltage(V): 28 Rated current(A): 17.9 Type of off-course: Wind direct-ion is decided by tail Type of limit speed: Stanting limited by automatic Protect: Manual Tower: Flexibility guy Altitude of tower(m): 6 Charging control: electron Weight (kg): 110 Power generation of years(kwh): 1250 Inverter power supply: Square wave Battery: N135x2 Time of charging(h): 14