Sungrow Inverters WiFi Reconnect

Sungrow SG Series

(For all Sungrow SG-Series inverters using a WiFi dongle)

1. Check the WiFi signal at your inverter

• Stand beside your Sungrow inverter with your phone and confirm your home WiFi network appears in the list.
• If your WiFi isn’t visible from this location, you’ll need a WiFi extender or a wired LAN connection (supported on most CX models).
• The inverter can only connect if it can detect your home network from where it’s installed.

2. Restart the inverter if it recently dropped offline

• Turn AC OFF using the main solar AC isolator near your switchboard.
• Turn DC OFF using the isolator beneath or beside the inverter.
• Wait one minute until all lights and the screen shut down completely.
• Turn DC ON, then AC ON again.
• Give the inverter a few minutes to reboot, then check whether the NET or WLAN light turns solid green.
• If it doesn’t reconnect, continue with the next steps.

3. Turn on the inverter’s WiFi hotspot

• On the WiFi dongle, press the multifunction button three times quickly.
• This puts the inverter into hotspot mode so your phone can connect directly.

4. Connect your device to the Sungrow hotspot

• Open the iSolarCloud app.
• Tap Support from the bottom menu.
• Select Local Access.
• Under Commissioning Tools, tap Local Access again.

5. Scan the QR code

• A camera screen labelled “Scan to Connect” will appear.
• Scan the QR code on the Sungrow WiFi dongle.
• When your phone prompts you to join the inverter hotspot, tap Join.

6. Enter login credentials

• When the identity verification page appears, use the default login:
  • Account: user
  • Password: pw1111
• Tap Verification to continue.

7. Connect the inverter to your home WiFi

• Once inside the local settings, tap More on the bottom menu.
• Select WLAN Configuration.
• This will open the WiFi setup page.
• A list of nearby networks will display — choose your home WiFi name and enter your password.
• Save the settings to confirm.

8. Check the connection

• The app will notify you once the WiFi link is established.
• Your Sungrow inverter’s WLAN light should now be solid blue, meaning it is online with a stable connection.

Troubleshooting if it won’t connect

• Make sure your router’s 2.4 GHz WiFi band is active — Sungrow inverters do not support 5 GHz.
• Check that the WiFi password is correct, including capitals and special characters.
• If the inverter doesn’t appear during setup, repeat Step 3 to re-enable hotspot mode.
• For commercial installations, a wired LAN connection is usually the best option.
• If issues continue, restart your inverter and router, or contact your installer or Sungrow Service.