Comment Just use the 220V supply that's already in the hom (Score 1) 196
In countries with single phase, almost everyone installs a home charger - typically on a 30-32A dedicated spur. This provides 7.2kW. In places where 3-phase 400V is common (e,g, Denmark) then you will see a lot of home charge points installed with 11kW points (16A 3-phase).
I live in the UK and the typical supply to a house is single phase 240V 100A and new build homes are increasingly coming with 400V 3-phase installation. My home has 400V 3 phase 100A (75kW) and hence I have a charging post with dual 11kW charging points.
Most importantly - this wasn't that expensive to install - the charging post was about $1,000 with the install adding about another $750 (and that's only because I needed armoured cable for the bit that ran underground).
Almost all US houses have 220-240V supplies (for dryers, stoves, etc.) - there is no need to compromise and use Level 1.