The main display on my Mate3 always shows a battery voltage 1.1v higher than my readings everywhere else. Here are some recent example readings:
- Battery bus plates, measured with DVM: 52.5v
- Battery BMS: 52.5v
- FNDC (which I'm assuming is where the settings>inverter>calibration reading comes from): 52.5v
- Charge controller (similarly read from the calibration settings): 52.5v
- Main display on the home screen: 53.6v
Is there anything I can do about this? Someone in the 2017 post described installing a potentiometer in the negative lead to their FNDC, but wouldn't this just change the reading on the inverter calibration screen, rather than the main screen?
I think this 1.1v-miscalibrated number is impacting the SOC readout as well, which is makes monitoring difficult.