When configuring multiple batteries on the GX Device, in the Menu → Settings → System Setup → Battery Measurements and enable the Quattro additionally, the sum of total Battery Power is misscalculated. (see Screenshot)
If both Batteries are discharged the leading sign for both batteries is - (Minus).
Expected result would be
Batterie_1 is discharging with -100 Watt
Batterie_2 is discharging with -50 Watt
combined battery power should be (-100) + (-50) = -150 Watt
observed Value is: -50 Watt, which is obviously wrong.