On the latest firmware (3.51), Cerbo GX loses communication with Pylontech’s BMS - after a few minutes of operation. After returning to (backup) firmware 3.42, communication with Pylontech’s BMS is stable, but there is no connection via the Remote Console. The settings related to the remote consol…

UPDATED 2025-01-10 - due to Venus OS v3.53 release which fixes this issue in most cases. On a systems having this issue: Check if VE.Can Port 1 is in use as well. Our VRM stats show that often its not. In case not, replug and reconfigure the GX to work on VE.Can 1 port instead. If both ports are …

Hi Is there already a new cerbo coming? Can you let me know the serial nbr of the old one?

Hi @mpvader the serial number of the old one is (redacted). That Cerbo ((redacted)) is still online. I planned to replace it for new one on November 26. I checked the settings again and they all match your suggestions. On the firmware 3.51 Remote Console works well but Cerbo loses connection with…

If you have Cerbo MK1, maybe your (separate) CAN-BMS module is having a slight problem. At some point Victron changed some parameters for that (external) CAN module. In other order of ideas, do you use a good (or genuine) CAN cable? Is the CAN terminator properly inserted on the Cerbo side?

Hi @EnerSol , Further to what Alex has asked, could you also please take some pictures of the installation, ideally close up of both GX and PYLONTECH ends, and then a wide one that shows as much as possible of the connection between them?

[Screenshot 2024-11-09 at 10.10.36] Just a strange coincidence: this occured also on my installation today, 10 days after upgrade to 3.50 Cerbo reboot did resolve this issue. This has never occured before. The time of the alarm is exactly at sunrise.

[image] Multiple systems on VenusOS 3.50 experiencing battery problems overnight New UI We have at least four systems having troubles here in the USA overnight. Three are customer systems - with three different types of communicating batteries - and one is one of my system…

I’m having the same issue. Installation worked perfect before. Since the update to 3.50 the BMS stops connecting sometimes with error #67. Checked and measured the cable and the cable is fine. I don’t see a reason why it stops. Sometimes after a reboot the system responds back normal and sometim…

Hi everyone here, Can I ask you a favour. Can you check, either on the Device List on the GX, or on the Device List on VRM, whether the battery still shows when this happens, or if that shows disconnected? On VRM, you will see that the battery line hasn’t been seen, for example: [Selection_195] …

Hey Izak. Thanks for your reply. As you say: ‘Last seen a day ago’ while the other equipment says 3min. My other installation has a Cerbo MK1 with same firmware (and MPPT 450/100 in stead of 450/200) doesn’t have this problem.

I have the same communications error #67 using Cerbo MK2, Previous cerbo’s with same v3.51 and now v3.52 no problems. I beleive it may have something to do with not having a dedicated BMS input and is now software based input. Sometimes it can go a day without an error then all of sudden it will fau…

Pylontech BMS Connection Lost - firmware OS 3.51

Q&A and troubleshooting New UI

vk_1 9 November 2024 09:55 9

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Pylontech BMS Connection Lost - firmware OS 3.51

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