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DIN-Rail DC Energy Power Analyzer Meter for Charging Pile Battery Solar PV Battery. Wide DC Voltage Range: Supports DC 0-1000V input for versatile DC system monitoring. Dual Communication Protocols: Supports Modbus-RTU and DL/T 645-2007 via RS485 and Infrared. High Precision & Accuracy: Offers Class 1 accuracy with 0.5 or 1 Grade options for reliable data. Flexible Customization: Customizable input current, auxiliary power, and communication interfaces. Robust Alarm & Control: Features 2 relay outputs and 2 digital inputs for alarm and control. Multi-Functional Measurement: Measures voltage, current, power, and forward/reverse energy in DC systems.