Fronius Energy Meters
| Device Type | Modbus TCP (Ethernet) | RS485 | Instruction video |
|---|---|---|---|
| Fronius 63A1 | ❌ | ✅ | |
| Fronius 63A3 |
Check the terminal labels for the exact meter model Terminal positions differ between the Fronius 63A1 and 63A3. Follow the manufacturer wiring diagram and connect RS485 A/+ to controller A, RS485 B/- to controller B, and the communication reference to GND when available. Do not copy terminal numbers from a different Fronius meter.