Features 1QUICKLY RESPONSE AND TRACKING: MPPT technology enables the controller to track the maximum power point of the solar panel even in complex environments with faster response and higher tracking than traditional MPPT tracking technology efficiency 2HIGHER ENERGY UTILIZATION EFFICIENCY: The built in maximum power point tracking (MPPT) algorithm can significantly improve the energy utilization efficiency of the photovoltaic system which is 15%20% higher than the traditional PWM charging method 3ADJUSTABLE VOLTAGE: Provides active charging voltage regulation. When the battery is open circuit or lithium battery BMS overcharge protection the battery terminal of the controller will output the rated charging voltage value and the MPPT tracking efficiency is as high as 99.9% 4MULTIPLE BATTERY TYPES: Circuit energy conversion efficiency up to 98% due to advanced digital power technology. Support charging procedures for various types of batteries such as lithium batteries gel batteries sealed batteries ventilated batteries lithium batteries etc. 5CURRENT LIMITING CHARGING MODE: When the power of the solar panel is too large and the charging current is higher than the rated threshold the controller automatically reduces the charging power so that the solar panel works under the rated charging current and supports the automatic identification of the voltage of the acid battery 6MODIFIABLE PARAMETERS: You can connect an external LCD screen or a Bluetooth module to view the operating data and status of the device and support to modify the controller parameters. Support standard protocol to meet the communication needs of different occasion 7OVER TEMPERATURE PROTECTIVE: The built in over temperature protection mechanism ensures that 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 8LONG SERVICE LIFE: Temperature compensation and automatic adjustment of charge and discharge parameters help to improve battery life. Provide solar panel short circuit protection battery open circuit protection and TVS thunder protection etc. Specification Item Type: MPPT Solar Charge ControllerMaterial: Aluminum alloyCharging Current: 40ADischarge Current: 40AMaximum PV Power: 550W 12V 1100W 24V Package List 1 x MPPT Solar Charge Controller1 x User Manual Note Please pay attention to electricity safety before use.