Features 1、LCD screen display all parameters. 2、With output switch, intelligent control, easy to operate. 3、Fully automatic operation. 4、Microcontroller digital accuracy. 5、A key to open and close the load. 6、PWM charging mode(SOC). 7、With separated temperature detected circuit, high precision temperature compensation function. Specifications 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. conservation: Overload conservation; Short-circuit conservation; Lighting conservation; Under-voltage conservation; Over-charging conservation; Reverse polarity conservation. 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 conservation: 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 conservation: 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 Note: 1. Order of Connection: connect storage battery firstly, then connect the solar panel; Order of Disconnection: disconnect the solar panel firstly, then the storage battery; otherwise it will cause damage to the controller. 2. The inverter can't be connected to the controller directly. 3. The controller will generate heat during operation, please notice that put the controller on flat surface with good ventilation. Configuration Selection: For 12V System, battery voltage is 12V, recommended input voltage of solar panel: 16-22V, when actual input voltage>50V, controller will be damaged; For 24V System, battery voltage is 24V, recommended input voltage of solar panel: 32-44V, when actual input voltage>50V, controller will be damaged. Package List: 1 * Solar Charge Controller 2 * DC Cable 1 * User Manual(English) Package List 1 * Solar Charge Controller 2 * DC Cable 1 * User Manual(English)