Sagy89

So I picked up 3 second hand us3000c batteries this week, 1 old chip and 2 new chip. Didn't read enough of the previous posts on this thread and got confused when the new chip units had v2.2 in them. Anyway, good to know that downgrading the software doesn't hurt them 😅 Thanks for all your hard work on here @Youda Great looking setup you've got over there. Sorry to have been another hijacking your thread, this thread seems to be the best place on the internet for getting Pylontech information though.

Thank you @Youda I'll have another go tomorrow morning. For now I have stripped the cells out and fitted them into a us2000c chassis that has a working BMS but failed cells. Hopefully I can get this one operational again too. If all else fails, do you know if anyone has had any success dumping and writing the flash chip? I just noticed that it has a winbond chip in there there, I have all the tools to read and write these IF this is where the firmware is actually located. I have 4 identical us2000b batteries, I was thinking I could read one of my working ones and write it to the bricked one. The serial number won't match what it should be any more but at least it might work.

Hi guys, So the whole story.. I was swapping out battery packs in one of my pylontech batteries today as it had a dead cell and though while I've got it isolated from the bank, I thought I'd update the firmware to get all the cell data available in the Victron inverter. I was completely unobservant and for some reason, fixated on just selecting the zip so as not to worry about selecting the right chip firmware, I completely forgot the fact that I do not have us2000c batteries at all 🤦‍♂️ I have us2000b batteries, So I have bricked a BMS by stupidly flashing the incorrect firmware. I have tried the update tool several times to recover the BMS but following the instructions included in the file, it just sits at "Get into bootloader mode" for as long as I leave it. Is there any specifics as to when or how long the red button needs to be pressed on the battery to get it into bootloader mode? Or is my BMS just simply dead now?