Huawei Sun 2000

Device Type	Modbus TCP (Ethernet)	RS485	Curtailment
Huawei SUN2000 Series Inverters	✅	✅	✅

Factory Reset Recommended: We strongly recommend performing a factory reset on the Huawei inverter before adding it to the Voltmaster Controller. This ensures a clean initial handshake and prevents potential connection conflicts.

Configuration

1

Install the FusionSolar app

Ensure you have the latest version of the FusionSolar App installed on your mobile device.

2

Establish local connection

Ensure the inverter is powered (AC or DC). Connect your smartphone to the inverter using one of these methods:

• WLAN Connection: Plug the WLAN/Smart Dongle into the USB port at the bottom of the inverter. Enable WLAN on your phone and stay within 5 meters.

3

Configure communication settings

1. In the app, go to Settings.

2. Navigate to Communication Configuration.

3. Select Dongle Parameter Settings.

4. Choose Modbus-TCP and set the connection to Enable (unrestricted).

Firmware Requirements: If the Modbus-TCP option is not visible, a firmware update for the inverter is required.

4

Configure power control and curtailment

To enable active power management via the Voltmaster Controller, follow these steps:

1. On the app home page, select Power Adjustment.

2. Select Grid-tied Point Control.

3. Select Active Power.

4. Set the Control Mode to Remote Output Control.