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Hi there A few months later, does anybody have an example of recent us5000 firmware allowing to use the batteries without canbus ?

Tinbum asked a good question : is the new battery the master ?

Hello Markus, do you have a gx device in your system ?

I wish I was not this first one. The "If DC-DC charging is used without communication, the battery BMS will not work" words, when I read them again, look sadly like they 100% explain what happens to me. The question becomes : can I safely downgrade and if so, what is the last "no canbus mandatory" version.

Thanks Tinbum After insisting a lot, I got this message Hi， Our US5000 battery can only be recognized by the inverter when there is communication. It cannot be used in mobile scenarios and needs to be installed in a fixed environment. If DC-DC charging is used without communication, the battery BMS will not work. If the battery is damaged, it will not be covered by the warranty. So if one has a US5000 working without canbus, do NOT upgrade the firmware because you will lose this functionnality !

Does anybody on this forum have some US5000 with firmware 1.9 inside ? If so, would you please try to discharge the batteries without any CAN device attached ?

Waiting for Pylontech's answer about that, 3 days pending.

If it's still time you may have a look at this page : https://github-wiki-see.page/m/victronenergy/venus/wiki/RaspberryPi-CAN-Interfaces Right now this one works fine for me : https://www.waveshare.com/wiki/2-CH_CAN_HAT But there seems to be something with risk of losses, so you may consider this : https://github.com/SebKuzminsky/mks-canable-2.0-pro/blob/main/README.md

Users like me like to be told about such an important FW modification, IF ANY (I'm a doubting guy, always keep in mind that I'm not omniscient), before buying. Nothing about that in the manual, unless I misread something ?

Ok thanks I was about to plug batteryview. EDIT : are you sure ? the latest firmware on Youda's page about updates is 1.3 for US5000

Yes they are, though I limited charge at 50 amps for two batteries through dvcc "limit charge current ". I also set the Victron 48v inverter to switch my 72v inverter on (I often use my electric motorcycle as a domestic battery !), it feeds "AC IN" as soon as the load goes over 5000w for 1 second

Well, now you have, if I believe what I see, and a written message from Pylontech, saying that I need to check communication between the batteries and the inverter. Which I did with a raspberry and a can-hat, this actually solved the "locked in IDLE" issue. I'm not super happy if that is confirmed, until now, I like my batteries to give a usable + and -, without any external signal required. (Though I could still open the box and go to the bones if absolutely needed, loosing my warranty).

Yes you did. Thanks. Now let's try with humility to understand what happens.

Would you then explain how I use a MPII since 3 years without any Can comm ? Tinbum, please, let Youda answer, I'd like to be as much on the details as possible.

Very sorry for the actual hijacking. It's because when I first met bugs with the batteries I fisrt thought I had the same kind of problem than BritishRacingGreen... Batteries are now alive and working. It is 100% verified : if I unplug the can wire from the "gx" raspberry (can hat has been added succesfully !) or the mk3 usb from the inverter the batteries just shut down, then there is a red "low battery" alarm on the multiplus and the whole system shuts down. So I guess your high voltage firmware version could explain that. Some kind of hazardous mix.