Operating Principle: The controller can control the wind turbine to automatically charge the battery. When the battery is fully , the fan will be braked automatically by the internal circuit. When the battery voltage to the voltage, the fan will resume charging the battery. 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. Modular Design: The rectification and circuit parts of the controller are designed with an integrated module, which is further than the 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 : The controller is made of aluminum material, corrosion resistance and wear resistance, comes with a span. Item Type: Wind Generator Controller Rated Battery Voltage: 12 or 24V Rated Wind Turbine Capacity: 400W Wind Turbine Voltage: 14.5V or 29V Wind Turbine Voltage: 13.5V or 27V IP Protection Level: IP67 Note: Pay attention to the safety of electricity use, and the wiring must be accurate. color:As shown Material:Aluminum Package Contents: 1 x Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.