[Too]

I don’t know about US but here in Northern Europe the utility outlets we use for stoves and such are not just higher voltage but also distributed over 3 phases rather than just one. This translates into sqrt(3)=1.7 times more of the cable can be used. For a 3x16A outlet you get 400V x 16A x 1.7 = 10kW.

Compared to a normal 220V 10A outlet where your max is 2kW.

Higher voltage also means you get more power for less current, less heat loss in the cables.

If you have an electric car, the example above should explain why you want to get a proper charger with proper wiring installed. Don’t use the ones which plug straight into a shuko.