A compact 4in1 interface module for easy inverter integration with flexible power options and IoT connectivity. RS485 communication interface: A to the inverter RS485 and B− to RS485− for reliable data exchange with compatible inverters and multidevice networks. Power supply options: 5V TypeC USB power or KF128 terminal power supply; you can power the unit from USB or terminal supply as site conditions allow. SIM card slot: Supports IoT data cards or ordinary mobile SIMs for full network access; install with the metal side facing down and ensure the correct orientation. DC input and grounding: 8–36V DC input via KF128 terminal; GND connected to the inverter 24V GND for a stable reference and wide compatibility. Key benefits Flexible installation: choose USB or terminal power to suit the site power available. Broad compatibility: works with most inverters supporting RS485 and a wide input range. Remote monitoring enablement: builtin SIM slot lets you enable IoT connectivity for monitoring and control. Robust wiring foundation: clear polarity and orientation guidance reduce wiring errors. Applications and use scenarios Remote solar or energy storage installations needing inverter monitoring and control over cellular networks. Industrial cabinets with RS485 devices requiring a simple IoT gateway and flexible power options. Fleet deployments of inverters in remote locations where simple, reliable network access is essential.