1. High-efficiency MPPT controller algorithm, MPPT efficiency is not less than 99.5%, and the conversion efficiency of the whole machine is as high as 98%.   2. Charging method: three-stage charging (constant current, constant voltage, floating charge), which can effectively prolong the life of the battery.   3. The LOAD mode includes normally open/normally closed mode, light control mode, dual-period control mode, and light control-fixed time control mode.   4. Automatic identification of battery system voltage. Customers can choose to charge 3 types of commonly used batteries (sealed lead-acid battery, colloidal lead-acid battery, open lead-acid battery), and can customize parameters to charge other types of batteries.   5. It has a current-limiting charging function. When the power of the user's battery board is too large, the controller automatically maintains the charging power, and the charging current will not exceed the rated value.      With high-definition LCD display function, you can view the operating data and working status of the equipment, and can support the modification of the display parameters of the controller.   RS485 communication, can provide communication protocol, which is convenient for customers to integrate management and secondary development.   Support PC software monitoring and WIFI module expansion to realize app cloud monitoring.   System voltage: DC12V/24V/36V/48V automatic identification   Rated current: 40A 60A   Maximum PV (voc) voltage: 150V   Material: ABS   colour: As shown      Package Contents:   1 x Solar Charge Controller      Only the above package content, other products are not included.   Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.