Features 1Peak Tracking: Using advanced dual or multi peak tracking technology, when the battery panel is shaded or partially damaged, multiple peaks will appear on the IV curve, the controller can still accurately track the maximum power point. 2High Efficiency: Built in maximum power tracking algorithm, the MPPT tracking efficiency can be up to 99%, significantly improving the energy utilization efficiency of photovoltaic system, about 25% higher than PWM charging efficiency. 3Current Limit Charging: Support sealed liquid rich gel and lithium battery, with current limiting charging mode. When the charging current of the panel is greater than the rated current, the controller automatically reduces the charging power. 4Multiple Functions: Supports instantaneous high current starting of capacitive loads, automatic identification of battery voltage, with lithium battery 0V charging function, and fault LCD display, convenient for users to determine system faults. 5Temp Rise Protection: Built in over temperature protection mechanism, when the temperature exceeds the device setting value, the charging current linearly decreases with the temperature, reducing the temperature rise of the controller. 6Temp Compensation: The solar charging controller has temperature compensation function, automatically adjusts charging and discharging parameters, improves battery service life, and has complete electronic protection function. Specification Item Type: Solar Charge ControllerNo Load Loss: 0.4WRated Load Current: 20AConversion Efficiency: 98%MPPT Tracking Efficiency: >99%Temperature Compensation Coefficient: -2mv//2V (default value)Working Temperature: -10-65Protection Grade: IP21Altitude: 3000 Meter / 9842.5ftFeatures: 1. Using advanced dual peak or multi peak tracking technology, when the panels are shaded or some of the panels are damaged, the IV curve will appear multiple peaks, and the controller can still accurately track the maximum power point.2. The built in maximum power tracking algorithm can significantly improve the energy utilization efficiency of the photovoltaic system, which is about 25% higher than the traditional PWM charging efficiency.3. The combination of various tracking algorithms can accurately track the best working point of the IV curve in a very short time.4. MPPT tracking efficiency up to 99.9%.5. Using advanced digital power technology, the circuit energy conversion efficiency is as high as 98%.6. Support colloidal battery, sealed battery, open battery, lithium battery and other different types of battery charging procedures.7. With current limiting charging mode, when the power of the panel is too large and the charging current is greater than the rated current, the controller automatically reduces the charging power to make it work at the rated charging current. Can support capacitive load instant high current start.9. With fault LCD display, convenient for users to determine the system fault.10. Built in overtemperature protection mechanism. When the temperature exceeds the set value of the device, the charging current decreases linearly with the temperature, thereby reducing the temperature rise of the controller and avoiding high temperature damage of the controller.11. With temperature compensation function, automatic adjustment of charge and discharge parameters, improve battery life.12. Perfect electronic protection function.13. Metal shell, better heat dissipation performance.14. Lithium battery 0V charging function. Package List 1 x Solar Controller4 x Screws4 x Expansion Screw1 x User Manual