Applies to: Sungrow string inverters using a Sungrow Wi‑Fi dongle (SG_Bxxxx hotspot) with the iSolarCloud app.
Estimated time: 5–10 minutes
You’ll need: iSolarCloud app (logged in), your home Wi‑Fi name & password, physical access to the inverter/dongle.
Contents
Quick start (TL;DR)
- Confirm your home Wi‑Fi is detectable near the inverter.
- Activate the dongle: press the dongle button 3 times.
- In iSolarCloud: Support → Local Access → scan the dongle QR. Join SG_Bxxxx when prompted. Log in with user / pw1111 (try PW1111 if needed).
- Tap More → WLAN Configuration → choose your home Wi‑Fi → enter password → Confirm.
- Success indicator: the WLAN light on the dongle turns solid blue. If it fails, unplug/reseat the dongle and retry.
Step‑by‑step: Sungrow with iSolarCloud
Check Wi‑Fi strength at the inverter
- Make sure your home Wi‑Fi is detectable next to the inverter; move the router closer or add a Wi‑Fi extender if the signal is weak.
Put the dongle into pairing mode
- Press the dongle’s button three times quickly. This wakes the local access function needed for setup.a
Connect via the iSolarCloud app
- Open iSolarCloud and sign in.
- Go to Support → Local Access.
- Scan the dongle QR code when prompted.
- When your phone asks, join the inverter’s Wi‑Fi network SG_Bxxxx.
Tell the inverter your home Wi‑Fi
- In the local access view, tap More → WLAN Configuration.
- Select your home Wi‑Fi from the list, enter the password, and tap Confirm.
- Watch the dongle: the WLAN light turns solid blue when connected. If it doesn’t, unplug and reconnect the dongle, then repeat the steps.
Troubleshooting & tips
- SG_Bxxxx doesn’t appear: Press the dongle button three times again and stand closer to the inverter. Ensure the dongle is powered.
- Local access password fails: Try both pw1111 and PW1111.
- No connection after confirming Wi‑Fi: Unplug and reseat the dongle, then repeat WLAN Configuration.
- General tip: Many inverter Wi‑Fi modules only work on 2.4 GHz. If your router combines 2.4/5 GHz under one name and the connection fails, try enabling a dedicated 2.4 GHz SSID or temporarily separating the bands.
Frequently asked questions
During setup you’ll join SG_Bxxxx (the inverter’s temporary Wi‑Fi).
iSolarCloud. From the home screen: Support → Local Access to start a local session.
Username: user and Password: pw1111 (or PW1111).
The WLAN LED on the dongle turns solid blue once the inverter is connected to your Wi‑Fi.
7 replies to “Sungrow inverter WiFi reconnection assistant”
Mark Doughty
having same problem just switched to nbn can not connect to inverter with old password that was never changed I am at a loss the wifi will pick up the inverter put in password can not connect wrong password
David
Same problems connecting to the internet.it says connected then says your internet connection is abnormal please check network 3 days of deleting the app and redoing with the same results
Brendan sord
Connected via Ethernet to modem , had 3 lights up after initial plug in , electrical contractor had to turn power off , now only the 2 left lights are on and we can’t connect, any ideas
rowena mangilit
Hi,
My inverter is connected to my WiFi but the app says offline. Because i change my internet provider now asking me the password of SGXXXX. How can Iretrive the password.
Please help.
Ray Koshko
the app find all my neighbours wifi but mine ! there is nothing wrong with the wifi at home
Bruce
Every chance the inverter is too far away from the wifi
Philip Argy
My error message is “Failed to set password. Please try again”. It says that after about a minute of the coms light flashing. I removed the wifi dongle and then re-installed it but that made no difference. The signal is four out of fivebars for the home wifo so it’s not a signal issue – it simply won’t accept the password. I suspect the issue is the new Telstra Smart Modem Gen 2 which insists on WiFi security like WSK or better which I don’t think the Sungrow dongle can be configured to provide. Also, how can I find out the MAC address of the dongle? I thought if I gave it a fixed IP address that might help.
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