After traveling around the world in November for work, Christmas has now been and gone.
4 weeks ago I found the tops of the contactors (relays) that connect the 48 volt battery blocks together were loose. Since then the electrolux has run almost perfectly. I am not sure a bouncing contactor could cause the "Earth Fault" but this is the only thing I have found wrong.
the pre-charge contactor in the VFD is sometimes not closing properly, but that causes an under voltage alert.
So all in all things are going well. Fingers crossed.
I have now traveled over 1100 km and am wearing the EV grin as I see the petrol prices steadily increasing.