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.