Our product adopts full seal completely waterproof design which adapt to the heavy humidity, salinity, such as ground water operational environment. This controller can control wind s to char the battery automatically.When the battery is fully chard, brake can be controlled automatically by the interior circuit. When the battery volta drops to restore volta level, wind can automatically recover to the battery charging, so as to protect the wind and the battery. MPPT electrodeless and noiseless unloading. Volta and current limiting are be enabled during recharging to ensure the best charging effect. Meanwhile, it provides the maximum protection to the wind and battery. reverse connect protection circuit. For improper operation the positive and negative of battery, don't need to replace the fuse, only to reset the positive and negative in correct point. So the whole system will be more reliable. The bottom of the controller has a brand-new LED display light and display screen. When you connect the battery, you can see the battery volta very intuitively, and you can keep an eye on the chan of the battery volta so that you can know whether your fan is charging the battery. Char.