This solar charge controller adopts the advanced digital techniques and operates fully automatically. The PWM battery charging mode can greatly increase the lifetime of your battery and has various unique functions and quite easy to use features.   Features: LCD screen display all parameters.  With output switch, intelligent control, easy to operate.  Fully automatic operation.  Microcontroller digital accuracy.  A key to open and close the load.  PWM charging mode(SOC).  With separated temperature detected circuit, high precision temperature compensation function.  DC 12V and USB 5V charging for DC lamp and phone.   Protection: Overload protection;  Short-circuit protection;  Lighting protection;  Under-voltage protection;  Over-charging protection;  Reverse polarity protection.   Specifications: Color: Black;  Material: Plastic;  Voltage of Battery: 12V / 24V Automatic;  Rated Charge/Discharge Current: 10A / 20A (Optional);  USB Output Voltage: 5V;  Total USB Output Current: 3A;  DC Output Voltage: 12V;  Total DC Output Current: 2A;  Overload/Short Circuit Protection: 1.5 Times by Rated Current;  Short Circuit Recovery Time: 10s;  Open Circuit Voltage of Solar Panel: 40V;  No Load Loss: 0.05W;  Over Voltage Protection: 15V; x2/24V;  Float Charge Voltage: 14V; x2/24V;  Discharge Recovery Voltage: 12V; x2/24V;  Over Discharge Voltage: 10.5V; x2/24V;  Control Mode: Software Intelligent Control;  Working Temperature: -35~55°C;  Item Size: 135 * 100 * 25mm / 5.31 * 3.94 * 0.98in (L * W * H);  Item Weight: 222g / 7.83oz;  Package Size: 14.5 * 12 * 3.8cm / 5.7 * 4.72 * 1.5in (L * W * H);  Package Weight: 270g / 9.54oz;   Package List: 1 * Solar Charge Controller;  2 * DC Cable;  1 * User Manual(English)