question

John McDermon avatar image

Cerbo GX not connecting to WiFi

Cerbo GX Running Firmware 2.63 with GX Touch 50 Display.

I just got home from having the solar install completed. The installer connected to my Verizon MiFi without a problem and it worked for two days while learning the system and on the two days to drive home.

HOWEVER, when I got home I noticed it was no longer connected. The last time the stars updated was 17 hours ago - so it disconnected sometime around midnight. I tried reconnecting using the VictronConnect app and all I get is a "Connection to XYZ network Failed" error. This is just a reconnection attempt to the same MiFi that it was connected to for the past two days. No configuration changes to either the MiFi or the Cerbo GX.

I tried connecting to my home eero WiFi network and I get the same connection failed message. The eero WiFi system broadcasts both 2.4 and 5GHz networks under the same SSID. It has the ability to turn off the 5GHz and only broadcast 2.4GHz for 10 minutes to help with connection problems. But, that didn't help. I also tried turning off the 5GHz on the MiFi and only broadcasting 2.4GHz with no joy.

This is not a bad password issue, because I did mistype the password on one connection attempt and got an "Invalid Password" error - completely different.

It is very frustrating to have just spent all this money of a state of the art system to have it not work before it's a week old.

Any ideas will be greatly appreciated.

cerbo gxwifi
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4 Answers
seb71 avatar image
seb71 answered ·

You definitively want/need 2.4GHz WiFi.


Try a a Cerbo GX reboot (from the menu).


I read some reports about the display messing with WiFi. Try disconnecting the display from Cerbo GX and see if that makes any difference.


I also experienced WiFi issues with FW 2.62 and FW 2.63, but only momentary WiFi failures (for several minutes, after which the connection resumes by itself). No issues when using FW 2.60. But your case seems different.

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Logic tells me that it shouldn’t be the display, since it worked flawlessly for 3-4 days. I’ll certainly give the reboot a try. Thx.

OK - tried the reboot from the menu. The connection attempt to the MiFi that previously worked definitely took longer, but ended up in the same place, with the "Connection to XYZ network Failed" error.

Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

A few weeks ago I had a problem with a costumers WPA 3 protected Wi-Fi.
The GX device found the network but couldn't connect.
The costumer had to switch back to WPA 2.

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Thanks for the tip - I did have my home networks configured to use WPA3, so I switched them back to WPA2, but still no-joy.

mvader (Victron Energy) avatar image
mvader (Victron Energy) answered ·

Hi all, there is a wifi related hardware issue in the Cerbo GX, when having a GX Touch 50 installed. The HDMI signal disturbs (some of the) wifi channel frequencies.

Details and solutions here: https://community.victronenergy.com/questions/82877/cerbo-gx-wi-fi-issue-when-having-the-gx-touch-conn.html


My apologies for the trouble!

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giorgos avatar image
giorgos answered ·

I have the same problem, the cerbo loses the wifi connection from time to time and displays "failure" I found the quickest way to restore it, while looking for a permanent solution, is the unplug the power from the cerbo and after reconnecting it comes right.

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