Ensure your USB-to-Serial adapter drivers (often FTDI or CH340) are installed so your Windows Device Manager recognizes a "COM Port." How to Use BatteryView Safely
Plug the USB into your laptop and the RJ45/RJ11 into the battery's Console port.
Click "Connect." If successful, the software will populate with the Serial Number and BMS data.
BatteryView is a Windows-based utility designed specifically for Pylontech Battery Management Systems (BMS). Unlike the simple lights on the front of your battery, this software provides a deep dive into the "brain" of the unit.