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My car already runs its thousands of cells mostly in parallel, because the manufacturer isn’t stupid. I am usually battery-limited while charging instead of ca

My car already runs its thousands of cells mostly in parallel, because the manufacturer isn’t stupid. I am usually battery-limited while charging instead of cable limited. I plugged into a 250kW charger on Friday and my car peaked at 132kW because even with a preconditioned and mostly-empty battery it can still only take so much. EDIT: I overstated things a little. I’m not usually battery-limited: I’m usually limited by the fact that my garage can only provide like 10kW of power. A better cable isn’t doing much there without major(ly expensive) upgrades to the wiring in the walls.

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.