[murderfs]

At the same amperage, it's exactly twice as good, but if you're going to get a 220V outlet installed, you're also going to get a higher amperage circuit installed at the same time, so you can charge at 220V/50A instead of 110V/12A, which is 8x faster.

[jaclaz]

But you need also the electric company to be able to deliver that power, roughly 10kW, in addition to all your other electric appliances.

Common contracts - at least here (Italy) - are for 3 or 4.5kW, a few are 6 kW, 10 kW or more are rare, and you probably need to get to 15kW to be able to have those 10kW available for charging.

[xxpor]

Anything less than 48kw is essentially unheard of in new construction in the US, and even old houses with 24kw service are getting upgraded. Less than 24 is considered essentially unsellable.

[jaclaz]

In new constructions, but what about the existing neighbourhoods?

[xxpor]

Same thing. If your house was built after WW2 it will usually have 200a service if you're all electric, and maybe 150 if your heat is non-electric. Most older houses have also been upgraded at this point too. It's not uncommon for larger houses to have 400a (96kw) service.