2 ms·
If electrical service enters through the garage, the additional wiring is probably minimal (though Cu prices are very high!), however: (Calculations for common
by quesera 5y ago
If electrical service enters through the garage, the additional wiring is probably minimal (though Cu prices are very high!), however:
(Calculations for common US garages)
NEC calls for 240V/200A service for an average-sized residence. Wire downsizing is allowed to 83% of service rating, so 166A.
So if my math is reasonable, in an average US single-family residence, you have max 39.84kW safely available for charging, with no other demand in the house.
(missing factor: what is the efficiency of AC-DC conversion in these chargers?)
Even at best, this is still only 30% of your battery limits, but might be more than 10kW for many customers.