Hoping to get some insights on this because it is very odd.
The ACin-1 of my Victron Quattro 15000VA it is connected to the mains but with an RCD to protect about 15meters of cable that is from main SwitchBoard to the Victron. In this case as soon as Victron internal switch makes the contact (click noise inside Victron) the RCD trips on the switchboard. I have tried to put a Type A just in case that would fix it but trips as well...
When I connect direct without RCD, all works perfect, Victron works as UPS and no issues in the supply.
Thanks a lot!