Description This Solar Battery Charge Controller automatically manages and regulates the voltage and current going into the battery from the solar panel, and it's designed with short-circuit protection, open-circuit protection, reverse polarity protection and over-load protection in order to ensure that the batteries are not overcharged. Features - Solar Charge Controller regulates the voltage from solar panels going to battery.- Build-in industrial master chip to control the charger and discharge process.Parameters are adjustable. Prolong the battery life cycle and keep the load work well.- Professional PWM charge management, all necessary protections equipped. Short-circuit protection, open-circuit protection, reverse polarity protection- LCD screen with backlight function clearly indicates status and data.- Easy to install and operate, suitable for home, industrial and commercial solar energy system application. Specifications - Color: Color: Black.- Material: Plastic.- Size: Approx. 18.8 x 5.2 x 9.2 cm.- Battery Voltage: 12V/ 24V.- Charge Current: 20/30A- DC: 12V- Floating impulse voltage: 13.7v / 27.4v- Undervoltage protection: 10.5v / 21v- Under voltage recovery: 12.2v / 24.4v- Loop pressure drop: 170mV- Temperature compensation: - 4 mv/Cell / - Working temperature: - 20 ~ 60 - Storage temperature: - 30 ~ 70 - Humidity: no more than 90%.Packing list: 1 x Solar Charge Controller