Sigenergy Inverters

Supported Devices

Device Type	Variants	Modbus TCP (Ethernet)	RS485	Curtailment
SigenStor	-	✅	✅	✅
PV Max
Hybrid

Wiring

The Sofar EMS and the Dyness inverters communicate via RS485 or Ethernet.

Ethernet

For correct ethernet wiring: Follow the the guidelines for ethernet wiring.

RS485

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	Sofar EMS model OM1	Sofar EMS model IG8	RS485-USB converter	RS485-Ethernet converter
A	RS485 A	RS485_POS	RS485 A	TX+
B	RS485 B	RS485_NEG	RS485 B	TX-
N/A	RS GND	GND	Not available	G

Configuration

Ensure that modbus is enabled:

1. From the main page go to "Device"
2. Click "Powerhouse Settings"
3. Enable "Modbus TCP Server Enable"

Ensure that the inverter has been set to Remote EMS Mode:

1. From the main page go to "System"
2. Click the three dots next to the installation namespace
3. Click "System Settings"
4. Click "Operational Mode"
5. Select "Remote EMS Mode"

Disable any grid limits:

1. From the main page go to "System"
2. Click the three dots next to the installation namespace
3. Click "System Settings"
4. Under "Operational Parameters" disable "Export Limitation" and "Import Limitation"
5. Set "Grid Connection Point Reserve Power Control Method" to "Power Per Phase"

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 Sofar EMS will find them faster!
• For each device, it is generally recommended to stick with the factory default baud rate, parity, and stop bits. The Sofar EMS will scan on those first.