# Huawei Sun 2000

> Connect a Huawei SUN2000 inverter to the Voltmasters EMS over Modbus TCP or RS485, with curtailment support and the recommended factory reset.

Source: https://voltmasters.io/en/docs/device-integrations/pv-inverters/huawei/huawei-sun-2000/

|  |  |  |  |
| :-: | :-: | :-: | :-: |
| **Device Type** | **Modbus TCP (Ethernet)** | **RS485** | **Curtailment** |
| Huawei SUN2000 Series Inverters | ✅ | ✅ | ✅ |

> **Danger**
>
> **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.
   
   #### ![The Huawei FusionSolar app icon next to a phone running the app.](https://voltmasters.io/assets/docs/image-3.webp)
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).
   
   ![Dongle parameter settings in the FusionSolar app with Modbus-TCP selected, and the connection choices Enable restricted and Enable unrestricted.](https://voltmasters.io/assets/docs/image-4.webp)
   
   > **Danger**
   >
   > Firmware Requirements: If the Modbus-TCP option is not visible, a firmware update for the inverter is required.
4. **Configure power control and curtailment**
   
   > **Note**
   >
   > 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.