Hi @RHammer,
This is such a tricky area to provide information about. It is almost in all areas where Victron is sold that this kind of AC work is legally the responsibility of a licensed electrician, and it is illegal for unqualified persons to undertake it.
The extent that Victron has gone to explain how our AC equipment is working in relation to earth fault protection is covered here - 7. Ground, earth and electrical safety
Beyond that there is no scope for discussion on this community. To everyone, if you are in doubt regarding AC wiring please use qualified licensed electrical trades people to test everything is safe.