Features 1、Automatically control the solar panel and battery in solar system. 2、Over-load /u0026 short-circuit conservation. 3、Reverse discharging /u0026 reverse-polarity conservation. 4、Under-voltage and over-charging conservation. 5、conservation from lightning strike. 6、Prolong the battery life cycle and keep the load work well. 7、Easy to set up and operate. 8、Suitable for small solar energy system. 9、conservation from lightning strike. Prolong the battery life cycle and keep the load work well. 10、Easy to set up and operate. Suitable for small solar energy system. Specifications The product is used to control solar panel and battery in solar system automatically. It is easy to set up and operate. Features: Automatically control the solar panel and battery in solar system. Over-load & short-circuit conservation. Reverse discharging & reverse-polarity conservation. Under-voltage and over-charging conservation. conservation from lightning strike. Prolong the battery life cycle and keep the load work well. Easy to set up and operate. Suitable for small solar energy system. Specifications: Color: Black Rated Voltage: 12V / 24V (Auto Switch) Rated Charge Current: 10A / 20A (Optional) Rated Load Current: 10A / 20A Stop Power Supply Voltage: 10.8V / 21.6V Resume Power Supply Voltage: 12.6V / 25.2V Stop Charging Voltage: 14.4V / 28.8V Temperature Compensation: -3mV/Cell/°C Operation Temperature: -20°C~60°C Item Size: 103 * 95 * 38mm / 4 * 3.74 * 1.5in Item Weight: 117g / 4.14oz Package Size: 11.5 * 10 * 5.2cm / 4.5 * 3.94 * 2in Package Weight: 153g / 5.41oz 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 PWM Controller 1 * User Manual (English) Package List 1 * Solar Charge PWM Controller 1 * User Manual (English)