Solis Grid-Tied Energy Meters
Supported Devices
| Device Type | Modbus TCP (Ethernet) | RS485 |
|---|---|---|
| Solis Grid-Tie Meter (via Inverter/EPM) | ✅ | ✅ |
| Autarco Grid-Tie Meter (via Inverter/EPM) |
Connection
Ethernet
For correct ethernet wiring: Follow the the guidelines for ethernet wiring.
RS485
Connect the RS485 wires to the communication port of the Solis device (Inverter or Export Power Manager).
Info
RS485 Wiring
- For correct RS485 wiring: Follow the guidelines for RS485 wiring.
- If the wiring shown in the table below is incorrect, please let us know.
- There is no general consensus in the industry about the usage of A and B for the RS485 polarity, so it may be counterintuitive and opposite of what you might expect for some devices.
| Device | a-TroniX Controller model OM1 | a-TroniX Controller model IG8 | RS485-USB converter | RS485-Ethernet converter |
|---|---|---|---|---|
| A | RS485 A | RS485_POS | RS485 A | TX+ |
| B | RS485 B | RS485_NEG | RS485 B | TX- |
| GND (optional) | RS GND | GND | Not available | G |
Configuration
Warning
NOTE: RS485 Device Addresses
- You MUST give each device on the RS485 bus a unique address. Check the manual of the device on how to do this.
- Use lower addresses first (1, 2, ...) because the a-TroniX Controller will find them faster!
- For each device, it is generally recommended to stick with the factory default baud rate, parity, and stop bits. The a-TroniX Controller will scan on those first.
Ensure the device is configured with the following Modbus settings to match the driver specifications:
- Baudrate: 9600
- Data bits: 8
- Stop bits: 1
- Parity: None
- Modbus Address: 1 (default) - Range: 1 to 254
Last updated December 11, 2025Edit this page