MOST IMPORTANT RULE for firmware upgrade/update: IF IT AIN’T BROKE DON’T FIX (if you have to get professional to do)
Dead Pylontech- How to bring pylontech back to life after corrupt or failed firmware update setp-by-step
1.Confirm the dip switches are 1-0-0-0 with battery off
2.Plug in debug cable/firmware upgrade cable
3.Run Upgrade Tool
4.On Upgrade Tool make a tick by immediate update and then click connect (should say connected)
5.Click on browse to .bin file and choose (HAS TO BE .BIN NOT .ZIP FILE) for me nt.bin one worked
6.Press “program” on Upgrade Tool
7.Quick switch on battery (hold the red button in and then switch on the main switch, you can release the red button after switch on)
Upgrade Tool should say Get in bootloader mode
Upgrade should load and battery should switch back on (if not start again from step 4)
My mistake I unzipped firmware when using BatteryView to upgrade
DO NOT unzip firmware file for BatteryView Upgrade (region settimgs on PC must be United States)
Hope this helps/makes someones life easier coz it took me a while to figure out