3 phase service would be a game changer, it would also depend on the available voltage and wether or not it was Wye or Delta configuration. The ability to drop in transformers and vary voltage or phases would make a drastic difference as you can get much more usable energy from 3 phase plus it’s more efficient.
What if one had three-phase service?
Also, how large of a battery bank running off of wind and/or solar would be needed?
It is rare for homes to have 3 phase available as it is usually reserved for commercial purposes due to the higher installation and maintenance costs for the utility companies.
Many of the commercial chargers are 480 volt 3 phase. I haven’t studied the EV platforms as much as I should have. I would assume the electric current is changed from AC to DC for the batteries.