Panzerknacker

You can bring dead batteries back to life after a failed firmware update without the help of Pylontech Support. If you turn on the small main switch while holding down the red start button, only the boot loader starts. First you download the package with firmware and the flash program: https://www.effekta.com/download/firmwareupdate-for-us2000c-3000c/ Unzip “Firmware update Pylontech US2000C_3000C V3_0.zip”. Turn off the battery Call “Update Tool.exe” in the “Upgrade Tool V1.0.9” folder Choose serial port Leave baud rate 115200 Click Immediate Update click Connect click Browse Select firmware file: NT1.8+ST2.8.zip (If you know what you are doing, you can also choose bin-files, e.g. Us_c_Nt_V1.8_Crc.bin for the newer US3000C) Start bootloader (press and hold red button and turn on main switch) program When finished, turn off the main switch, turn it on again, press the start button. If “Unknown Input String” comes up when you click program, unfortunately you can’t select the zip file (e.g. NT1.8+ST2.8.zip) with Browse, but must first unpack the zip and select the appropriate bin file (e.g. Us_c_Nt_V1.8_Crc.bin). NT1.8+ST2.8.zip