Sungrow Inverters

Supported Devices

Device Type	Modbus TCP (Ethernet)	RS485	Curtailment
SG-Series	✅	✅	✅
S-Series
SR-Series
MVS-Series
ST-Series
SH-Series
SBR-Series
SC-Series

Physical Connection

Ethernet Connection

For correct ethernet wiring, follow the guidelines for ethernet wiring.

RS485 Connection

1. Locate the COM port on your Sungrow inverter
2. Connect the RS485 cable:
   • Connect A+ (typically red) to pin 1
   • Connect B- (typically black) to pin 2
   • Connect GND (typically yellow) to pin 3 if available

Network Configuration

For Ethernet Connection

1. Set the inverter's network settings:
   • Access the inverter's display interface
   • Navigate to Settings → Communication Parameters
   • Enable MODBUS-TCP
   • Set the communication address (default: 502)
   • Configure DHCP or static IP as needed

Device Configuration

Enabling Modbus Communication

1. Access the inverter's LCD screen
2. Navigate to Settings → Communication Parameters
3. Set the following:
   • Protocol: MODBUS
   • Device Address: Set a unique address (1-247)
4. For Modbus TCP:
   • Enable MODBUS-TCP
   • Port: 502 (default)
   • IP Address: Configure as per your network requirements

Verification

1. Check the communication LED indicator:
   • Steady green: Normal communication
   • Blinking green: Data transmission in progress
   • Off: No communication
2. Verify network connectivity using ping test (for Ethernet)

LED Status Indicators

LED Status	Meaning	Action Required
Steady Green	Normal operation	None
Blinking Green	Data transmission	Normal operation
Off	No communication	Check connections and settings
Red	Communication error	Check configuration and cables