Sungrow

Sungrow Troubleshooting (iSolarCloud Offline + Dongles)

Step-by-step troubleshooting

1) Check if the inverter is actually running

• Look at the inverter screen
• Is it showing normal generation (kW output)?
• Any fault or error codes displayed?

If it’s producing power but the app says offline, it’s likely a communication issue only.

2) Check your internet connection

• Is your home Wi-Fi working?
• Has your router been reset recently?
• Any recent password change?
  If yes, the Wi-Fi dongle likely needs reconnecting.

3) Check the Wi-Fi / Dongle lights

Most Sungrow systems use one of these:

• Wi-Fi dongle
• LAN dongle
• 4G dongle

Look for:

• Solid green = connected
• Flashing = trying to connect
• No light = no power

4) Reboot everything (fixes most cases)

1. Turn off inverter AC isolator
2. Turn off DC isolator
3. Wait 2 to 3 minutes
4. Turn DC back on
5. Turn AC back on
6. Restart your internet router
7. Wait 5 to 10 minutes and check the app again

5) Check the monitoring app

Most systems use iSolarCloud:

• Check if it says “Device Offline”
• Check last update time
• Confirm the correct plant/site is selected

Common causes in Australia

• Router auto updates (NBN changes)
• Weak Wi-Fi signal in garage
• Storm or power outage reset the router
• 2.4GHz Wi-Fi disabled (Sungrow often needs 2.4GHz)

When to submit the form

Submit the form if:

• Inverter shows a fault code
• No generation during daylight
• Dongle lights are completely off
• Reboot didn’t fix it