Hello all,
Recently we have received feedback from our customers which complained about the WLAN connectivity issues on the new 3-phase SUN2000-M0 inverters.
The issue consists into the fact that the Wi-Fi router can't be fount through the WLAN dongle, the Wi-Fi doesn't appears into the available networks.
If you encounter this kind of issue with your inverter, please follow the below steps:
- install (or update) the Fusion Solar APP (the necessary version is 2.3.7);
- open the Fusion Solar APP and press the three dots (...) from the upper right corner and then press Device Commissioning Tool;

- connect locally to your inverter (Installer / Pass: 00000a), go to Device Maintenance / Upgrade Device and select SUN2000MAV100R001C00SPC107 firmware package / Upgrade / Confirm;
- it will take 2-3 minutes and then inverter will restart, connect again locally to your inverter and go to Communication Configuration / Router Connection Settings and select your Wi-Fi network, input password and press Connect. It will take 10-20 sec to connect and it will prompt you that the connection succeeded;
- go back to Communication Configuration / Management System Configuration, select intl.fusionsolar.huawei.com and press Connect. Again, it will take 10-20 sec to connect and it will prompt you that the connection succeeded;
If everything is fine, go back to the main page of the application and check the status of the monitoring system (connectivity/cloud), see below:

If you don't manage to solve the issue, please don't hesitate to contact us at: eu_inverter_support@huawei.com
