MDK
Aussie Member
Generally, dual chargers are twice as fast as single chargers. Makes sense, right?
But it all depends. If you are below 16A anyway, it won't make a difference. If it's a Tesla Wall Charger, it can make a single phase supply into three virtual phases and thus charge up to 45 km/h, even with one phase - on a single charger Model S.
If it's a non-Tesla charger, though, a single charger Model S on a single phase charging station, cannot get more than 1x16A, or about 15 km/h charging (3 to 3.5 kW). In this case, you would get 32 km/h (7 kW) rather than only 15 km/h, with the very same charger (if you have dual chargers in your car).
One of the Aussie Tesla owners has made up a Mennekes-Mennekes cable that is wired like the Tesla Wall Charger (single phase input, three phase output)
I tested it today on a single charger Model S and got 30A (the max at this station); with Tesla supplied cable at this same charger it maxes out at 16A
He also sells a J1772 to Mennekes cable that is wired the same, so you can charge at up to 32A on a single-charger Model S.
The J1772 cable can be ordered direct from his website but the Mennekes cable is special order only right now (not many Mennekes stations in Australia other than a handful in Perth, Western Austalia)