Question regarding ET340 Import/Export display (Single-phase 230V) and Cerbo GX behavior

DIY
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1

I would like to confirm the behavior of the ET340 energy meter and its display on Cerbo GX.

Currently, I am using the ET340 in a single-phase 230V system.
On the Cerbo GX interface, voltage, current, and power are shown (L1), and the values appear as positive and negative.

Could you please clarify the following points?

  1. Is my understanding correct that:
    Positive values = Import from grid (normal power flow),
    Negative values = Export to grid (reverse power flow)?

  2. In a single-phase configuration,
    does the ET340 measure Import and Export separately,
    and Cerbo GX displays them as signed values (+ / -)?

  3. On the Cerbo GX UI,
    is there any way to display Import and Export as separate values?
    (e.g., showing Export power independently instead of using negative values)

  4. If EM540 is used in a single-phase setup,
    is there any possibility that Import and Export values are netted (cancelled) instead of shown separately?

  5. When export (reverse power flow) occurs,
    under what conditions will this energy be used to charge the battery in a MultiPlus-II system?