Features: 1. Street lamp automatic recognition, on-line use. 2. PWM solar charge controller PWM 50: Compared with normal solar charge controller, this PWM controller could increase efficiency by 10%-30%. 3. This controller can charge and discharge at the same time. 4. This PWM controller has perfect SOC function, control charge current, and supply power to the loads. Function: 1. Keep the battery on fill voltage condition. 2. Prevent the battery from over-charging. 3. Prevent the battery from reverse charging to solar panels during nights. 4. Reverse polarity protecting for battery. 5. Reverse polarity protecting for solar panels. 6. When the battery voltage is low, the controller will automatically cut off the load from the system. If the voltage of battery is back to normal and the load will restart working. 7. Thunder protecting. 8. According to the battery voltage grade, the controller can automatically set charge-off voltage, the load-off voltage, the load- restore voltage. (The parameter is default under 25 celsius degree condition, locked by the CPU procedure, cannot adjust.) 9. The controller will automatically compensate the temperature of the charging voltage according to the changes of ambient temperature. Specification: Weight: 95g Size: 103*96*35mm Rated charging current: 10/20/30/40/50A Rated discharge current: 10-15A Material: plastic Application: Solar System Controller Maximum Current: 50A includes:1 X Solar Panel Regulator