Marsrock 400Watt 500Watt 600Watt Wind Turbine Generator Controller IP67 Waterproof 12V/24V Automatic Controller AC to DC1. this controller can control wind turbines to charge the battery automatically . When the battery is fully charged, brake can be controlled automatically by the interior circuit. When the battery voltage drops to restore voltage level, wind turbine can automatically recover to the battery charging, so as to protect the wind turbine and the battery. 2. Voltage and current limiting are be enabled during recharging to ensure the best charging effect.