Stand close to your Sungrow inverter with your phone and check that your home WiFi network appears in the list.

If your network isn’t visible near the inverter, you may need to install a WiFi extender or use a LAN cable (supported on most CX models).

If the inverter cannot detect the signal, it won’t be able to connect to the internet.

Switch the AC supply OFF using the main solar AC isolator near your switchboard.

Switch the DC supply OFF using the isolator positioned under or beside the inverter.

Wait for one minute until all lights and display indicators have completely turned off.

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 turns solid green.

If it’s still not connected, proceed to the next steps below.

Press the multifunction button on the Sungrow inverter’s WiFi dongle three times in quick succession.

This enables the inverter’s internal WiFi hotspot so your phone can connect to it.

Open the iSolarCloud app.

Tap Support in the bottom navigation bar.

Select Local Access.

Then, 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 your Sungrow inverter’s WiFi dongle.

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

An identity verification screen will appear.
Enter the default login details:

• Account: user
• Password: pw1111

Then tap Verification to proceed.

After logging in, tap More in the bottom navigation bar.

Choose WLAN Configuration.

This will open the WiFi setup page.

Select your home network

A list of available WiFi networks will be displayed.

Locate your home WiFi network, tap it, and enter your WiFi password.

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

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

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

Verify that your WiFi password is accurate, including any uppercase letters or special characters.

If the inverter does not show up in iSolarCloud, repeat Step 3 to reactivate hotspot mode.

For commercial installations, using a wired LAN connection is recommended for stable data transmission.

If issues continue, reboot both your inverter and your router, or reach out to your installer or Sungrow Service for assistance.