question

Hi @Prekursorius, my first bet would be the configuration of your clamp multimeter. Can you set it to the lower range (60A) and make sure it is configured to measure AC (not AC/DC)?
Furthermore, it looks like there is quite a lot of distortion current (as indicated by low power factor) and your clamp multimeter might not play nicely with those nasty waveforms. Most meters that can handle this are marked as "True RMS" meters and yours doesn't seem to carry that label.

You can also hook all of the CTs over a single wire, and if all of them read the same current its a good indication that the VM-3P75CT is functioning normally.

Connected correctly, we've checked it several times

Colors are corect

This is not the first time we have installed a Victron meter, we didn't have this problem before. the impression is that the CT rotation is wrong

Hello everyone, I had similar problems and could not explain the values.
Phase L3 with over 2A should only supply a few watts? Makes no sense....

The solution was that the transformers (although the plastic clip was correctly closed) were not completely closed. After I additionally pressed them together with cable ties, it looks like the meter is delivering correct values.

We haven't found the cause yet, so we just installed an Eastron meter, which shows the correct values. However, the Victron smart meter has not been uninstalled yet, so we will try Filbo's solution and I will post the results here.

Filbo's solution didn't work for us, so the meter was uninstalled, and we used Eastron instead.