Prefectca wrote:

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And it is recommended to plug into a 240V 40A circuit! Given the average house (in Australia at least) only has a 63A single phase 240V supply to it, that would cost a bit to upgrade the mains into the house.

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 In Ontario Canada the minimum code for a home electrical service has been 240 volt/100 amps for many years with many homes being 200 amp.  In North America most small appliances, lighting and refrigerators are 110 volts. This probably is the reason for the higher amperage electrical service as compared to Australia and probably Europe as well.

Paul

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Most houses in Australia built today are 100A single phase now too with many at 80A or 100A 3 phase, and have been for a while (like the last 15 years or so). BUT, most houses would also be an average age of 30 years old, and the bulk of these have 63A single phase supplies. Aircon was a luxury back then and lots of homes had gas supply for heating and cooking, so all you needed was a small supply for lighting and GPO's. So whilst new houses and relatively new houses can cater for charging, older ones cannot. And whilst the newer homes may have the internal capacity, the distribution network does not. With a huge amount of infill development now occurring (lots near me) where old houses on 1/4 or 1/2 acre blocks are being subdivided off (or demolished) with 5-20 units being built on the block, the networks are stretched to the point of not coping with local supply and in reality some local battery banks have been added to cope with the summer peak demand (like 5pm-10pm when it is hot and people have aircons on and are cooking), often using power off rooftop solar that is exported to the grid from homes. If you try to add in vehicle charging on top of all that it won't cope. There will be a solution, but not the current technology.

If you are going to try and use 110Vac single phase power to charge an EV you'll require more than double the current to provide the same charge rate. My guess is most 110/115Vac supplies come into the premises with at least two phases or 3 phase or even split phase. So you'll get a larger single phase voltage across two phases, so connecting across two 115Vac phases will give you 115 x sqrt(3) = 200V single phase. Possibly the US chargers will come in 3 phase supply too. A 120V split phase will give you 240V single phase across two phases.