Autarco LQH-series RS485 wiring | Sofar EMS Documentation

This page describes the communication with an Autarco LqH-series hybrid inverter over Modbus-RTU (rs485). By default, the inverter is set to address 1. The RS485 communication happens over a RJ45 interface called located on the bottom of the inverter behind a protective plate. The exact position is marked in the orange box in the image below:

The pin definition of the RS485 Port is following (EIA/TIA 568B):

RS485A on Pin 5: blue/white
RS485B on Pin 4: blue

NOTE: RS485 Device Addresses

You MUST give each device a unique address on the RS485 bus. Check the device manual for instructions.
Use lower addresses first (1, 2, ...) because the Sofar EMS will find them faster!
For each device, it is generally recommended to keep the factory-default baud rate, parity, and stop bits. The Sofar EMS will scan those first.

After a successful RS485 connection and communication with the Sofar EMS over the Modbus-RTU protocol, the Autarco inverter will now show a new blue icon on its status indicator panel:

Last updated August 24, 2026

The pin definition of the RS485 Port is following (EIA/TIA 568B):

RS485A on Pin 5: blue/white
RS485B on Pin 4: blue

NOTE: RS485 Device Addresses

You MUST give each device a unique address on the RS485 bus. Check the device manual for instructions.
Use lower addresses first (1, 2, ...) because the Sofar EMS will find them faster!
For each device, it is generally recommended to keep the factory-default baud rate, parity, and stop bits. The Sofar EMS will scan those first.

After a successful RS485 connection and communication with the Sofar EMS over the Modbus-RTU protocol, the Autarco inverter will now show a new blue icon on its status indicator panel:

Last updated August 24, 2026