Specification:Item Type: Wind Solar Charge ControllerHost Size: Approx. 174 x 145.5 x 70 mm / 6.9 x 5.7 x 2.8 inShell Color: GreenMaterial: ABSSystem Rated Voltage: 24/48V automatic identification Model GPI-48220 GPI-48280 Battery Voltage 24V 48V 24V 48V Wind Turbines Rated Power 600 1200 800 1600 PV Module Rated Power 500 1000 600 1200 Maximum Input Voltage: Wind turbines<80V, solar panel <95VNo Load Current (DC): ≤0.05AThe Controller Takes Power: Battery or photovoltaic panel to take powerControl Method: Fan MPPT boost charging function, PWM unloading function, PWM overcurrent limiting functionLoad: A variety of working modes are available: pure light control mode, normally open mode, light control + time control mode (four periods + morning light)Display Mode: LCD, Chinese display, clear and intuitiveDisplay Parameters: Voltage, battery power, current, power, load mode, temperature, etc.Protection Type: Solar battery anti reverse charging protection, battery open circuit protection, battery reverse connection protection, overcurrent and overvoltage soft automatic braking protection, overload protection, etc.Heat Dissipation Method: Aluminum heat dissipation and self coolingOperating Temperature And Humidity Range: -20~+55℃/35~85%RH (but no condensation)Weight: Approx. 2289g / 80.7ozApplicable Battery: Genera acid lithium batteryApplication: Wind solar energy storage power station, wind solar monitoring system, wind solar lighting systemFailure Analysis:When the fan is connected to the controller, the speed of the fan becomes very slow immediately?1. The battery voltage arrive the floating charging point2. The rated output voltage of the fan is much higher than the rated voltage of the