On Fri, 25 Dec 2020 10:31:18 -0500, Paul wrote:

At what point does it become infeasible to charge multiple cars
overnight using a single 80 or 100 Amp 2 phase supply?

80 A @ 230 V is 18.4 kW so in theory OK for 2 * 7 kW chargers. "In
theory" 'cause it's doubtful the street cabling or local substation
or indeed the nearest primary substatio0n is rated anywhere near
enough to enable many homes on the average street to pull 14 kW for
any length of time.

But that's not how current generation families are working it.

Not ATM but with diesel/petrol due to be off the market in 10 years
it doesn't leave much time to get the infrastructure right from the
power stations to street cabling upgraded.

The Park and Ride nearest me has room for several hundred cars (and
land to pave more spots). There are more of these around the city
outskirts.

300 * 7 kW = 2.1 MW = 190 A @ 11 kV or a slighly more manageable 63 A
@ 33 kV...

--
Cheers
Dave.