Sungrow Inverter Wi-Fi Reconnect

For all SG-Series Sungrow Inverters with Wi-Fi Dongle.

1. Check your Wi-Fi signal strength
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Stand close to your Sungrow inverter with your phone and make sure your home Wi-Fi network appears in the available list.

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

If the inverter cannot detect the Wi-Fi signal, it will not be able to connect to the internet.
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2. Restart the inverter if recently disconnected
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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.
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3. Enable the inverter's Wi-Fi hotspot
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On the Sungrow Wi-Fi dongle, press the multifunction button three times quickly.

This activates the inverter’s internal Wi-Fi hotspot so your phone can connect.
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4. Connect your phone to the Sungrow hotspot
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Open the iSolarCloud app.

Tap Support in the bottom navigation bar.

Select Local Access.

Under the Commissioning Tools section, tap Local Access again.
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5. Scan the QR code
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A Scan to Connect camera screen will appear.

Use it to scan the QR code on the Sungrow Wi-Fi dongle.

When prompted, tap Join to connect your phone to the inverter’s hotspot.
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6. Enter the login details
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An identity verification page will appear.

Enter the following default credentials:

• Account: user
• Password: pw1111

Tap Verification to continue.
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7. Connect the inverter to your home Wi-Fi
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Once logged in, tap More in the bottom navigation bar.

Select WLAN Configuration.

This will open the Wi-Fi setup page.

A list of available Wi-Fi networks will appear.

Select your home Wi-Fi network and enter your Wi-Fi password.
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8. Verify connection status
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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 Wi-Fi connection.

Make sure your router’s 2.4 GHz Wi-Fi band is enabled. Sungrow inverters cannot connect to 5 GHz networks.

Double-check your Wi-Fi 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.