Hello all,
I have a system with 8 Pylontech US3000C connected via BMS CAN to the Cerbo GX. It worked without issues for over 1 year now. After Updating the Cerbo GX to firmware version v3.31 I already saw the Error #67 BMS connection lost now for the second time within a few days. The issue happened early in the morning both times. The Multiplus 2 went to Pass Thru / Low Battery voltage and the solar chargers stopped and did not start to charge when the sun came out (float mode).
When I noticed the system to be in this state I wanted to check if a new firmware for the Cerbo GX was available and I clicked on "Check for updates" in the menu "Online Updates". It looked like the Cerbo could not contact the update server as it said "checking..." for quite a while. Normally it returns the answer within 1-2 seconds. Not sure if it was to do something with the Error #67, but it was the same both times I saw the issue. I then quit the menu and restarted the Cerbo GX.
When the cerbo GX started up it again beeped showhing "Error #67" and "Multiplus-II Low battery voltage" but then after some seconds the system started to work normally.
I have the strong feeling that it could be a software issue in the Cerbo GX firmware v3.31 (especially as it seems to have issues to contact the update server when it is in the error state). I now went back to v3.30 to check if the issue happens again.
Please let me know if anybody experienced the same issue when starting to use v3.31.
Thanks and regards
Martin