Pylontech Firmware Updates (We Take No Responsibility For Any Firmware Posted Here, Choose Correct Firmware For Your Battery)

Good news, thank you. Which Version of Battery View did work for you? Maybe you can provide a link?
Pylontech’s support has so far been unsatisfactory. They responded very quickly and referred to the dealer, the dealer referred to Pylontech again. Since then, Pylontech has not responded.

Try THIS Link… if its not working PM me your email address and I will mail the file to you.

Hello all,
i would need to upgrade an SC0500 high voltage BMS pylontech, through RS485 port. Is it possible to make it? i guess using the Battery view…

Thanks, unfortunately it didn’t work. No response on the Console-Port. And unfortunately no response from Pylontech to my emails either. I bought Pylontech because of the many good ratings and reports, unfortunately now there is no advantage over a cheap DIY solution. Or even worse, at DIY I could very easily buy a new BMS.

I would like to try. I have send you an PM…

My broken US2000 works again. Thank you @JacoDeJongh and @Pylontech-Jeff. The crucial tip came from Jaco and he forwarded me to Jeff. With a special upgrade tool, the Pylontechs can be flashed again, even if they don’t seem to react on the consolenport. Lesson for me: Don’t use any binaries from the forum, but the ones from Pylontech that are really suitable for my hardware revision.


This is strange. I only use the bin files I have posted above and never bricked a battery. The first time I used the file from Jeff (the one that automatically choose the firmware) , I bricked my first unit.

The secret with the binary files above is to chose the correct one for your battery. If you choose the wrong one, you will brick the battery…

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But it seems, it is only soft-bricked. That means, it stops working, but you can still recover it. Hard-bricking is the one where it cannot be recovered.

It is pretty common for electronics with an MCU to employ the “bootloader” method. The first bit of code on the chip is in charge of 1) accepting new firmware updates and writing it to the “main” application address on the chip, 2) on every bootup, check if there is a new incoming firmware, if not 3) check the checksum of the main firmware and if it matches, jump to it (aka launch the application), and if not 4) stay in bootloader mode so new firmware can be sent.

The MPPTs and the Multis all do this. Even fitness watches do it. So in all cases, people should try that first. Even if there are no lights blinking, that is normal. The main application is not running, so it will appear to be dead.

The trick here appears to be not to reflash it with the same firmware repeatedly.

On the Us3000 yes, but I could not help @JaeDi recover his US2000 units…

Seems he had to use a different tool and method than the one I used to recover the US 3000


There are different hardware revisions, especially with the C version it seems to have become even more difficult, due to the shortage of chips. Only Pylontech knows for sure the correct firmware for a specific revision.