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So just tested the off voltage on the discharge port with a 1k resistor in parallel with multimeter and voltage dropped from almost 1v down to .04v and with a wire shorted across .01v this confirms to me its mosfet switch leakage on the BMS, there are no relays in there and mosfets will still...

Yes its probably coincidence, again the battery on the charge and discharge port read the same and it is the expected voltage at 100% SOC. Whats more likely the battery is only 93% charged based on the screen voltage or a 100% based on a multimeter reading? Why would you go through the trouble...

Ok I see what you mean by "guard voltage" although I would call it just some voltage leak when the BMS is off, probably the switching mosfets are leaking a little when off. When on the charge port and discharge port have the same voltage which reads about 1 volt higher than the screen. So again...

Trying to understand what you mean by "guard voltage", are you saying there is a boost converter in the BMS somewhere upping the battery voltage 1 volt to fool the charger? I see a similar discrepancy between my multimeter and the display, but occams razor says either the display is off of my...