Features Specifications:PV & Wind Hybrid Charging Controller  The PV-wind hybrid controller made by our company can transfer the energy from wind turbine or solar cell to storage battery. The controller has not only perfect appearance and convenient operation, but also over-charge protection, low-voltage protection, pole-confusion protection for storage battery and automatic dump-load function.  The controller is adopted the constant voltage charging mode-PWM, and it has reliable and safe operation, high efficiency, long service life functions. 1. PWM constant charging mode-PWM. 2. The pole confusion protection for solar cell.  3. Low-voltage protection: When the battery voltage is below 21V, the ABNORMAL indicator lights till the battery voltage up to 23.5V. 4. Over-voltage protection: When the battery voltage is above 30V, the ABNORMAL indicator scintillated, and the controller stopped to charge the battery. After the battery voltage falls back to 29V, normal charge is recovered and the ABNORMAL indicator extinguished simultaneously.  5. The pole confusion protection for battery: If the battery polarity is confused, the fuse will fuse, avoiding to breakdown and damage to internal components of the controller. 6. Automatic dumping load function: When DC voltage input the controller is above 90V, which rectified from the three phase AC voltage, output from wind turbine, the controller will dump load automatically (for fan to stop),meanwhile the two indicators WIND and SOLAR light at the same time. The system will return to normal and indicators extinguished after 35 minutes.  Controller ModelRated DC Voltage (V)PV maximal input power (Wp)Wind turbine maximal input power (Wp)Over-discharge protection voltage (V)Over-discharge recovery voltage (V)Over-charged protection voltage (V)Over-charged recovery voltage (V)Automatic brake protection (v)Automatic recovery time (min)Operation Ambient temperature Protection Rating Elevation (m)Size (D X W X H)mmWS12400 12 200 300 10.5 11.7 15 14.5 70 35 -20°C~50°C IP20