Range doesn't bother us - our holiday house is ~50km away and we installed a 32A socket down there as well. 500km range is similar to the ZB - but a damn site cheaper to charge.
Average fill on the ZB is $80 - and probably for 3/4 tank.
Assuning the 60 kWh battery on the M3 is completely empty:
Charging on solar - forgoing $0.10/kWh FIT - $6 to charge
Charging using offpeak power - $0.25/kWh - $15 to charge
Charging using peak power - $0.40/kWh - $25 to charge
The Tesla UMC (which is no longer included with vehicles, I just scraped in to get one included) comes by default with a 10A and 15A tail. There is an aftermarket 32A which uses a 32A 3 pin or 32A 5 pin single phase socket for charging.
It cost me about $200 for the tail and $400 for the sparky to isntall the socket.
With the 32A tail, charging time from empty is ~ 8 hrs - ie overnight.
We could have probably gotten by with the 10A - but it's nearly 24hrs for a full charge - which is inconvenient.
Superchargers are MUCH faster.
Gratuitous car collection photo attached.
What current does that draw for the 8 hours charging ?
How much current does it draw on standby for 16 hours ?
Calculate that for 365 days @ the current cost per kw/h,
And that would be on a day rate,
Imagine the quarterly power bill.
With all the extras load on the grid,
And power stations shutting down,
There will be more blackouts/brownouts and more house fires.