…the off plan apartment I’m buying in Melbourne… has recently added the option to include an EV charger for my car space. Unfortunately they can only supply them for around 50% of the available car spaces…
They really should be able to supply them for all. My guess is that
1) They are making them faster than they need to be. They could have have twice as many (i.e.100%) if their power rating were halved. Charging at home does not need to be fast.
2) They are probably relatively high powered outlets 7kW (32A single phase) or 11kW (15A, 3 phase) without a load management system. Consequently, they have to factor in the possibility of all being used at the same time as the evening peak load of the building and they didn’t want to pay for a higher powered supply from the street. If they were load managed, they could have them in 100% of the parking spaces without needing a higher supply from the street. With load management, the chargers would operate at lower power at times of high demand from the rest of the building but then ramp up their output when the building demand was lower, overnight and through the day.