This page describes the communication with an Autarco LQ-series hybrid inverter over Modbus-RTU (rs485). By default, the inverter is set to address 1. The RS485 interface is a 4-pin connector on the bottom of the inverter behind a protective plate. The exact position is marked in the orange box in the image below:
Looking closer the port looks like this:
An appropriate connector should be used for this 4-pin connector on the Autarco inverter to connect to the Sunlight Group EMS. On the Sunlight Group EMS, the inverter can be connected to the RS485 port. The wiring is as follows:
| Device | Sunlight Group EMS model OM1 | Sunlight Group EMS model IG8 | RS485-USB converter | RS485-Ethernet converter |
|---|---|---|---|---|
| Pin 3 | RS485 A | RS485_POS | RS485 A | TX+ |
| Pin 4 | RS485 B | RS485_NEG | RS485 B | TX- |
| N/A | RS GND | GND | Not available | G |