Huawei

The following guide describes how to configure the Modbus TCP settings for Huawei inverters and how to test the connection.

Prerequisites

Hardware Requirements

Mobile device
- iPhone with iOS 10.0 or later
- Android with Android 4.0 or later
Huawei SDongle
Internet connectivity
WiFi capability

Software Requirements

SUN2000 App (version 3.2.00.015 or later)
Available from Huawei AppGallery

Configuration Process

Initial Setup

Install SUN2000 App from Huawei AppGallery
Ensure SDongle remains powered throughout configuration

Connection Setup

Open SUN2000 App
Select Connect → WLAN
Choose inverter's WiFi network
Enter password:
- First login: Changeme
- Change password after initial login

Modbus Configuration

Login as installer (default password: 00000a )
Navigate to: Settings → Communication Configuration → Dongle Parameter Settings → Modbus-TCP
Select appropriate access mode:
- Unrestricted : Allows all LAN devices (one at a time)
- Restricted : Requires setting trusted IP address
- Disabled : No Modbus access

Important Notes

Configuration settings persist through power cycles
New inverters require fresh configuration
SDongle replacement doesn't require reconfiguration
Keep SDongle powered during configuration process

Troubleshooting

Missing Modbus Options

If Modbus settings are not visible:

Check firmware versions
Update app if necessary
Verify SDongle compatibility

Connection Problems

If unable to connect:

Ensure SDongle is powered
Stay within WiFi range
Verify correct password

Testing connectivity (advanced)

Once you've configured Modbus TCP on your Huawei inverter, it's essential to verify that the connection is working correctly. You can follow our testing guide to confirm the connection. For Huawei inverters, note that the default Modbus port is 6607, which differs from the standard Modbus port. The Unit ID is typically set to 1. If you've enabled the restricted access mode, make sure you're testing from an allowed IP address.