Prevent the battery from over-charging, over-discharging. Prevent supplying power to solar panels during nights. Small size, can be easily installed with solar panel easily. Made by ABS material, protect the solar panel control chip and water. Feature - - Material: ABS+Electronic Components. - Size: 7 x 6 x 0.5cm. - System voltage: DC12V. - Controller self-consumption: 10MA. - Rated charging current: 10A. - Rated load current: 10A. - Overcharge: Protection: 14.4V/28.8V. Floating charge: 13.5V/27V. Recovery: 13.2V/26.4V. - Over discharge protection: 10.8V/21.6V. Recovery: 12.3V/24.6V. - Load overvoltage: Protection: 16.5V/34V. Recovery: 15V/30V. - Maximum solar cell open circuit voltage: 25V/36V. - Working temperature: -20 degree centigrade- +50 degree centigrade. - Smart Adjust: According to the voltage of battery, controller will adjust the charging current and decide if to supply power to the loads. - Battery Protect: Professional charge chip can prevent the battery from over-charging effectively. - LED indicator lights: Indicate the voltage level of battery accurately. Load LED indicates the working condition of loads. - Portable, Lightweight and Compact: Can be carried around and set up between solar panel and battery easily for operation. Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 1 x 12V 10A Photovoltaic Controller Small Solar System Controller Solar Panel Assembly