It’s an RCD that keeps tripping, located in the electricity box outside. I remember you commenting Kezo, when I had it installed, that it was a poor place to locate it. It resets ok and works again for another couple of hours before tripping again. The car has 3 levels of AC charging, 100%, 90%, or 60% (which works out to 4.4kw), and the first 2 trip but the 3rd doesn’t. There’s no effect on the rest of the house, just the charger.
TBH although it’s an inconvenience I’m going back to petrol next month so it’s only going to be for a short while. I’ve been lucky with the ICCU and the 12V so I’ll cross my fingers it isn’t that!