China 500w vertical wind turbine

vertical wind turbine :
1.Easy to install,operate
2.30%-40%wind efficiency
3.No noise,galvanized
4.Low start-up wind speed
vertical wind turbine :

500w VH model technical parameter:
Power
500w
Rotor diameter
1.4m
Height of blades
1.5m
Break method
Electromagnetic brake
Material of blades
Glass Fiber Reinforced Plastic
Noise at 3 meter
<30dB
Upper weight(kg)
67
Number of blades
4
Rated rotor speed
200r/min
Rated wind speed
8m/s
Start-up wind speed
2m/s
Work wind speed
3-25m/s
Survival wind speed
40m/s
Output voltage(DC)
24V
Height of tower(advised)
6m
Output control system
charger control, inverter
Suggestion battery
12V150AH*2

the pictures of our 500w VAWT: