Stand close to your Sungrow inverter with your phone and make sure your home WiFi network appears in the available list.

If your WiFi network is not visible at the inverter, install a WiFi extender or use a LAN cable (supported on most CX models).

If the inverter cannot detect the WiFi signal, it will not be able to connect to the internet.

Turn the AC isolator OFF using the main solar AC switch near your switchboard.

Turn the DC isolator OFF, located under or beside the inverter.

Wait for one minute until all display lights and indicators have shut down.

Turn the DC back ON, followed by the AC.

Allow a few minutes for the inverter to reboot, then check whether the NET or WLAN light becomes solid green.

If the light does not turn solid, proceed with the next steps.

On the Sungrow WiFi dongle, press the multifunction button three times quickly.

This activates the inverter’s internal WiFi hotspot so your phone can connect.

Open the iSolarCloud app.

Tap Support in the bottom navigation bar.

Select Local Access.

Under the Commissioning Tools section, tap Local Access again.

A Scan to Connect camera screen will appear.

Use it to scan the QR code on the Sungrow WiFi dongle.

When prompted, tap Join to connect your phone to the inverter’s hotspot.

An identity verification page will appear.

Enter the following default credentials:

• Account: user
• Password: pw1111

Tap Verification to continue.

Once logged in, tap More in the bottom navigation bar.

Select WLAN Configuration.

This will open the WiFi setup page.

A list of available WiFi networks will appear.

Select your home WiFi network and enter your WiFi password.

The app will notify you when the inverter has connected successfully.

Your Sungrow inverter’s WLAN light should now be solid blue with no flashing, confirming a stable WiFi connection.

Make sure your router’s 2.4 GHz WiFi band is enabled — Sungrow inverters cannot connect to 5 GHz networks.

Double-check your WiFi password, including any uppercase letters and symbols.

If the inverter does not appear in iSolarCloud, repeat Step 3 to re-enable hotspot mode.

For commercial systems, a wired LAN connection is recommended for stable communication.

If issues continue, restart both your inverter and your router, or contact your installer or Sungrow Service for further assistance.