This guide explains how to configure and connect the Etrel INCH and INCH Duo smart AC chargers for communication with the Sofar EMS.
| Device Type | Variants | Modbus TCP (Ethernet) | RS485 | Curtailment |
|---|---|---|---|---|
| Etrel INCH / INCH Duo | All variants supporting Modbus TCP (via local network) | ✅ | ❌ | ✅ (per‑connector current control) |
For general Ethernet wiring best practices, see the .
After the electrical installation of a charger is complete:
Power up the charger.
Access the local web interface.
Log in and verify communication settings.
255.255.255.0 and port 502 must be open for Modbus TCP.Enable Modbus TCP communication.
Check protection devices.
Verify the LED and LCD indicators.
Test communication.
ping <charger_ip> to verify the connection.Confirm Modbus control.
Installer tip If connection fails, use the side maintenance door to restart the station. Hold the reset button for 4 seconds until the beep, then choose Reset network to restore default IP (192.168.1.250).