| Device Type | Variants | Modbus TCP (Ethernet) | RS485 | Curtailment |
|---|
| SigenStor | - | ✅ | ✅ | ✅ |
| PV Max |
| Hybrid |
The Sofar EMS and the Dyness inverters communicate via RS485 or Ethernet.
For correct ethernet wiring: Follow the the guidelines for ethernet wiring.
InfoRS485 Wiring
- For correct RS485 wiring: follow the RS485 wiring guidelines.
- If the wiring shown in the table below is incorrect, please let us know.
- There is no general industry consensus on the use of A and B for RS485 polarity, so the naming may be counterintuitive for some devices.
Ensure that modbus is enabled:
- From the main page go to "Device"
- Click "Powerhouse Settings"
- Enable "Modbus TCP Server Enable"
Ensure that the inverter has been set to Remote EMS Mode:
- From the main page go to "System"
- Click the three dots next to the installation namespace
- Click "System Settings"
- Click "Operational Mode"
- Select "Remote EMS Mode"
Disable any grid limits:
- From the main page go to "System"
- Click the three dots next to the installation namespace
- Click "System Settings"
- Under "Operational Parameters" disable "Export Limitation" and "Import Limitation"
- Set "Grid Connection Point Reserve Power Control Method" to "Power Per Phase"
WarningNOTE: RS485 Device Addresses
- You MUST give each device a unique address on the RS485 bus. Check the device manual for instructions.
- Use lower addresses first (1, 2, ...) because the Sofar EMS will find them faster!
- For each device, it is generally recommended to keep the factory-default baud rate, parity, and stop bits. The Sofar EMS will scan those first.
Last updated August 24, 2026
