Non essential loads on AC-out 2 Consumption from battery

I have my 1 phase car charger, a boiler en some other loads on AC-OUT 2 from my multiplus 48/5000 phase 1 unit
Both other units from Phase 2 and 3 dont have any non essential loads connected (yet)

All loads on all units are on AC-out for power assist.
i have an ET340 at the grid side measuring all incoming/outgoing loads.

With Version 3.52 ( and up until 3.60 Beta 8 ) the battery is still draining when charging my car or heating up the boiler. i have tried multiple settings on net metering through the multiplus or my ET340, Total of all phases or individual phase, switching self consumption to all loads and back to critical loads only but still not working as it should be.

In the VRM (or on the screen from the GX device) i dont see any non critical loads. in the Venus OS 3.42 this was the same.

Maybe i need a current meter to establish this?
When installing a current meter on AC-OUT 2 from unit 1 what kind of meter do i need. the cheap current sensor for installing in the mp2 or maybe an extra ET112 or ET340 (for 3 phase metering for the future AC-out2 connections)

What am i doing wrong?

I didn’t think i need so much extra measuring devices for everything to work properly. So much extra wire connections with possible bad connections.