Submitted by crmedved on May 8, 2019
So, I'm a model 3 owner and got a S loaner while I have some warranty work done. At home I charge on a "normal" wall connector attached to the exterior of my house using my mobile charger. The outlet is basically on its own 15A circuit. Yeah, not a lot, but I can full charge twice a week for free while I take a train to commute, so I don't charge at home often.
Anyway, my M3 liked the 15A circuit fine, and auto-adjusted to 12A. The Model S loaner I got immediately trips the GFCI when it tries to pull current. I've used both my own wall connector and the one that was in the car. I've tried setting it to 5A max before plugging it in and it does not help at all.
The S didn't have a J1772 adapter in it and I left mine in my M3, so I can't charge at the train station or home... I'm lucky there is a super charger nearby I guess. Seems weird though.