Features 【Modular Design】: The rectifier and brake circuit are designed with integrated modules, which are more advanced in terms of heat dissipation and reliability. 【Using in Water】: Full sealing and IP67 waterproof design ensures that the controller can be used normally for a long time even if it's placed in water, and the stability is greatly improved. 【Easy to Install】: Simple wiring with light weight and compact size makes the installation much more convenient. 【Secure Working】: When the battery is fully charged, the internal circuit automatically controls the fan to brake. When the battery voltage drops to the recovery voltage, the fan resumes charging the battery, thereby protecting the fan and battery. 【Smart Charging】: This regulator can be applied to control the wind generator to automatically charge the battery. Specification: Item Type: Wind Turbine Controller Material: Aluminium Alloy Working Voltage: 48V Power: 400W Size: Approx. 9 x 8.5 x 2cm / 3.54 x 3.35 x 0.79in Waterproof Rating: IP67 Package List: 1 x Wind Turbine Controller Note: Pay attention to electricity safety, and the wiring must be accurate. Package List 1 x Wind Turbine Controller