The following guide describes how to configure the Modbus TCP settings for Deye inverters and how to test the connection.
Prerequisites
Compatible with
SUN-G3-EU-230Series (300W to 2000W models)Network scanning tool (e.g.,
Advanced IP Scanner)Web browser
Network connectivity
Configuration Process
Locating Your Inverter
Choose one of these methods:
Use your router's interface
Use
Advanced IP Scannerto identify inverterIP
Accessing Settings
Enter inverter
IPin browserLogin with default credentials:
Username:
adminPassword:
admin
Modify URL to:
http://<ipaddress>/config_hide.html
Modbus Configuration
Configure "Internal server parameters settings":
Set Protocol to
TCP-ServerSet Port to
8899Enter your server
IPaddressSet TCP timeout to
300
Troubleshooting
Inverter Discovery Issues
If you cannot find your inverter:
Verify inverter power status
Check network connectivity
Try alternative network scanning tools
Settings Problems
If settings are not saving:
Confirm you're using the
config_hide.htmlURLClear browser cache and retry
Verify
adminaccess rights
Modbus Connection Issues
If Modbus is not working:
Verify port
8899is accessibleCheck server address accuracy
Test using
Modbusdiagnostic tool
Testing Connectivity (advanced)
After completing the configuration, you should verify that the Modbus TCP connection is working properly. Follow our testing guide to confirm the connection. For Deye inverters, remember to use port 8899 when testing the connection. The Unit ID is typically set to 1, but you may need to try 0 if that doesn't work.