Features:1. It has overcharge, overdischarge and overload protection.2. The battery has the functions of power-off, lightning protection, brake protection and anti-reverse charging.3. Three voltages of 12V/24V/48V are automatically identified.4. Suitable for: fishing boat, street lamp, home, monitoring, small mobile base station, etc.5. Improved three-stage charging algorithm to effectively prevent battery uneven and vulcanization phenomenon and improve battery life.6. The breeze starts, solves the fan dormant state under the low wind speed.Specification:Condition: 100% Brand NewRated Voltage: 12V / 24V / 48VRated Power: 400W / 800W / 1000WBattery Protection: 15V / 29V / 58VTemperature Compensation: 8mV / / 2V (adjustable) -20 ~ 65 Working Temperature: -20 ~ + 55 35 ~ 95% RH (no dew)Storage Temperature: -30 ~ + 65Use Elevation: 5500MSize: Approx. 18.1 * 7.7 * 5cm / 7.13 * 3.03 * 1.97in Weight: Approx. 464g / 16.4 ozInstallation:1. It's the battery's positive and negative electrode interface.2. Green LED indicator lights up when the system is working properly.3. The red LED indicator lights up when the battery is full or the controller is in emergency braking mode.4. The emergency switch, the switch is in the "one", the system is in the emergency braking state, the red LED will be lit at the same time, is in the "0" state, the controller is in the normal working state.5. The wind turbine terminal can be connected to the wind turbine's three lines in turn. If it is a direct current fan or a single fan, the fan line can be arbitrarily connected to two of the three terminals. The controller is compatible with three-phase, single-phase and DC fan on the market.Package list:1 * Wind Turbine Controller.