| Device Type | Variants | Modbus TCP (Ethernet) | RS485 | Curtailment |
|---|---|---|---|---|
| iWell Cube Battery (Experimental) | Cube Series | ✅ | ❌ | ✅ |
The Sunlight Group EMS communicates with the iWell Cube battery system using Modbus TCP (Ethernet).
Connect the Ethernet (LAN) port of the battery system to the same network as the Sunlight Group EMS.
| Device | Sunlight Group EMS model OM1 | Sunlight Group EMS model IG8 | RS485-USB converter | RS485-Ethernet converter |
|---|---|---|---|---|
| Ethernet (TCP/IP) Port | RS485 A | RS485_POS | RS485 A | TX+ |
| Port Number | RS485 B | RS485_NEG | RS485 B | TX- |
| Connection Type | RS GND | GND | Not available | G |
Ensure both the Sunlight Group EMS and the iWell Cube battery are in the same IP subnet
(e.g. 192.168.1.xxx) and can communicate over port 1025.
The iWell Cube Modbus TCP interface is active only when the battery system is powered on and initialized.
Do not connect to inactive units or during firmware updates.