Canada

I think it's worth another reply to mention, while I think you'd be fine on 120v and most people could probably cheaply upgrade to a nema 5-20 outlet and 20amp breaker switch if they needed a bit more daily charge, neither of those are as efficient as charging at 240v.

I charge my car on 120v and it's about 80% efficient and drops off as it getd really cold. I think 240v is 90-95% efficient.

If we have millions of people charging their cars on 120v as that's all they need and it's the cheapest option for them, that's a lot of wasted electricity.

So really long term we probably do want people to make the upgrades to their boxes and wire in a new outlet as it'll help us reduce our power consumption. Hopefully they'll be a lot of incentives available for people to make the upgrade.

It would be like the big push from incandescent to fluorescent or led house lighting. Semi low hanging fruit to reduce power consumption by upgrading to something more efficient.