Technically speaking we do have 240V in all of our walls, you just have to use 2 of the hot wires instead of 1 hot wire and the ground-referenced neutral. 240V 30A+ outlets accessible from the garage/driveway should be becoming a lot more commonplace in the EV era, if they become common enough companies might start designing heavy duty lawncare equipment that can take advantage of it.
>Technically speaking we do have 240V in all of our walls, you just have to use 2 of the hot wires instead of 1 hot wire and the ground-referenced neutral.
No, you don't. Have you done any house wiring? The only place you can get 240V is at the panel; from there, there are branch circuits that go through the walls. Each branch circuit uses a (probably 14-gauge) Romex cable that has 3 conductors: hot (black), neutral (white), and ground (which has no insulation). There's no way you can just open the wall and get access to 240V.
>240V 30A+ outlets accessible from the garage/driveway should be becoming a lot more commonplace in the EV era
That's only happening because people are paying a lot of money for an electrician to pull a heavy-gauge cable through the walls and wire it to the panel. It's not normally a DIY project. It might be easier in many garages though since the panel is frequently located there, and some garages are unfinished.
Technically, you could rewire one of your branch circuits to be 240V by connecting the neutral to a hot, and using a different circuit breaker, but this would be totally illegal since it's not to code.
You only need heavy gauge wire for a high amperage circuit. There are NEMA receptacles for 240V 15/20A circuits, you could absolutely wire one up with the normal 15/20A wire and have it be up to code as long as you use the correct receptacle on the circuit. It might not be exceedingly useful in the short term, but with an adapter you could use imported European equipment at least.
