Hmm… With a rough look at power needs in the new house, I think 400A will cover it, but it is close. The main panel is subscribed about 1.65:1, which is typical with lots of high load devices. I am sure I am missing another 50A in there.

The non generator panel is subscribed 1.8:1, but whatever chargers I use I suspect they will support load communication (so they can share circuits).

The welder circuits are also shared with one of the tesla circuits in the lower garage.