Protective Function: When charging, the controller has the function of limiting voltage and current to the best charging effect. At the same time, it provides maximum protection for wind turbines and batteries. Operating Principle: The controller can control the wind turbine to automatically charge the battery. When the battery is fully , the fan be braked automatically by the internal circuit. When the battery voltage drops to the recovery voltage, the fan resume charging the battery. Modular Design: The rectification and circuit parts of the controller are designed with an integrated module, which is further than the traditional terms of heat dissipation and reliability. Waterproof Performance: This controller adopts more than IP67 fully sealed and completely waterproof design, which can be used normally for a long time even in water. Aluminum Alloy: The controller is made of aluminum alloy material, resistance and wear resistance, comes with a span., Weight: 0.60075966395 pounds, Manufacturer: NONDK