I was in a similar situation - main panel across the house from the driveway. If your panel has the capacity, suggest you have them set up for 100 Amps to a subpanel near the charger. Gives you options for future chargers, etc. Also, if the subpanel is visible from the HPWC, it can serve as the cut-off switch.
The thicker wire for 100 Amp cable costs a bit more per foot, labor and any carpentry will be the same. The good news is:
- You won't have to worry about running a higher-capacity power line later. My engineering experience is that, if you can afford the extra capacity, it turns out to be useful sooner than you expected.
- You're ready if your next EV has faster charge capability.
Though your handle suggests you've been around this circuit a few times before.
