On 24/11/2019 11:10:07, 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?

There are two aspects.
1) 3 phase has less copper loss than single phase.
2) 3 phase rectification provides significantly less ripple current than
single phase rectification.

Normal domestic and light industrial supplies are 100A feeds which give
a max of 23/24kW depending on supply voltage

Add one more cable and you could have 69/72kW assuming a neutral is not
required.