6.Worm and worm gear specially assembled to make the clearance small. 7.First design of mppt function from wind turbine to make sure the wind turbine have the rated output when the wind turbine over the rated wind speed. 8.Special signal transmission system, wind vane and wind anemoscope no need to be on the wind turbine any more. 9.Mechanism brake for your option. 10.Complete isolation design with stable quality to make sure the controller can work in extreme conditions. Life time can reach up to 6 years. 11.Matched controller with pwm charging , electronic and manual brake , dump load , untwisted protection 12.Each parameter showed on the lcd display of the controller. Some parameters are adjustable and can be set by yourself. One pc in one plywood