Yes large machine tools can make this an essential as well, as a friend
discovered a few years ago. although you can simulate three phase its not
going to allow the power needed when the motor starts etc, in the case of
charging a car, this current used to charge it seems very high. Goodness
knows what the cost will be, and one assumes it has its own meter.
Brian

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"harry" wrote in message
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On Sunday, 24 November 2019 11:10:10 UTC, John wrote:
Just curious (not clever enough to work it out) but why are 3 phase
chargers more powerful than single phase fed ones?

Is it just that the mains circuits have different capacities or is a 3
phase when rectified more powerful?

Bigger electrical loads of all types are three phase to balance up the
currents in the electricity supply. unbalanced loads lead to voltages
appearing on the neutral and reduced capacity of transformers/switchgear
etc.

So if you have a single load of more then approx. 10Kw, the supplier will
want you to you having a three phase supply.