1、High Efficiency: With high conversion efficiency, clear LCD backlight display, efficient MPPT algorithm. Simple in operation and high in efficiency. 2、Practical Using: Wide input PV voltage 150V, suitable for various common solar panel, also supports 3 types of commonly used batteries, and you can customize the parameters to charge other types of batteries. 3、Safe in Working: Using ultra low power consumption power chip to reduce static standby energy consumption and nighttime energy loss. And the LOAD mode includes normally open, normally closed mode, light control mode, dual period control mode, and light control fixed time control mode. 4、Auto Recognizing: Automatic identification of battery system voltage. Allows for 3 stage charging, constant current, constant voltage, floating charge, which can effectively prolong the life of the battery. 5、Better Charging: With current limiting charging function, when the battery board power is too large, the controller automatically maintains the charging power, and the charging current will not exceed the rated value. 6、Communication: RS485 communication can provide communication protocol, which is convenient for you to integrate management and secondary development. Supports PC software monitoring, support WiFi module expansion to realize APP cloud monitoring. Item Type: Solar Charge Controller Product Size: Approx. 19.8 x 19 x 7cm / 7.8 x 7.48 x 2.76in Application: For home power generation system, power station system, RV and ship system, off grid monitoring power supply system, base station system. Maintenance and Cleaning: 1. Replace the Fuse: If the fuse is blown due to high temperature or other faults, it is necessary to replace the fuse correctly. Remove the broken fuse from the interface, install a new fuse, check whether the connection is correct, and then install the device. 2. Clean the Vent Heat Sink: Regularly clean the fan vents and internal heat sinks with a dry or slightly damp cloth. Weight: 1772 g / 62.51 oz(approx.) Specification 20A Product Category Controller Type Controller with Maximum Power Point Tracking, MPPT. MPPT Efficiency 0.995 No Load Static Loss 0.5W~1.2W System Voltage Automatic Identification Cooling Method Air Cooling System Identification Voltage Range 12V System DC9V~DC15V 24V System DC18V~DC30V 36V System DC32V~DC40V 48V System DC42V~DC60V Input Characteristics PV Variable Output Circuit, VOC DC150V Start Charging Voltage Point Battery Voltage +3V Input Low Voltage Protection Point Battery Voltage +2V Input Over Voltage Protection Point DC150V Input Over Voltage Recovery Point DC145V Solar Panel Rated Input Power 12V System 260W 24V System 520W 36V System 780W 48V System 1040W Charging Characteristics Applicable Battery Types Sealed battery, colloidal battery, open battery (you can also customize the parameters to charge other types of batteries). Charging Rated Current 20A Temperature Compensation -3mV/℃/2V in default. Charging Method 3 stages, fast charge in constant current, constant voltage, floating charge. Output Voltage Regulation Accuracy 0.015 Load Characteristics Load Voltage Same with Battery Voltage Rated Load Current 40A Load Control Method Normally open and normally closed mode, dual period control mode, light control mode, light control fixed time control mode. Low Voltage Protection Default is 10.5V, revert to 11V, can be set. How to Set Host computer, APP, controller display interface. Display and Communication Display Mode HD LCD segment code backlight display. Communication Method 8 pin RJ45 interface, RS485 supports host computer monitoring and WiFi module expansion to realize APP cloud monitoring. Other Characteristics Protective Function Input and output over voltage protection, anti reverse connection protection, temperature protection, battery drop protection, etc. Working Temperature -20℃~+50℃ Storage Temperature -40℃~+75℃ IP Protection Class IP21 Noise =40dB Working Altitude(Approx.) 0 ~ 3000m / 0 ~ 9842.52ft Maximum Wire Size 20mm² 1 x Solar Charge Controller 1 x Connecting Cable 1 x English User Manual