Electrician is here . . . What's required for 240 outlet?

A 20 amp circuit (12 ga wire) will do for the PIP.
12 ga doesn't even get the slightest bit warm during a recharge.
I used 12/2 for my 240v outlet- per code I had to use red electrical tape to mark both ends of the white to show that it was hot in this configuration.

IIRC the PIP only draws 12-13 amps during full power portion of the recharge cycle, then drops down to lower amp draw to finish off the charge.

 

I'm no electrician, but as I understand it from what I've read:

For the plug, that depends on the EVSE/maximum draw... Different EVSEs allow for different amperage draws and with that different plugs. For example, the leviton's pluggable configurations use a NEMA 6-20R receptacle for their 16 amp evse, and NEMA 6-50R for their 30-40 amp evses. (Their prewire kits include the receptacles, covers, boxes for placing it in the drywall, and the mounting bracket). Note: the PIP won't be making use of the higher amperages - that's just how much the evse reports it can supply (which should be appropriate for the circuit, of course). The charger in the car decides how much of that it can/does use - to make full use of the higher amperage evses, you'd need to a higher powered EV (or I suppose have visitors that do). Not those can't be used for the pip, just that it won't be taking advantage of the full current available.

As far as the circuit goes, charging would be considered a continuous load. You should see the circuit rating the evse calls for in its specs. I have the leviton 16-amp evse, and it calls for a 20-amp circuit.

 

Would it be advantageous to have him wire in a higher rated circuit (say 30 amp) while he's there for future-proofing?

 

It wouldn't hurt. #10 wiring is not much more expensive.

 

That's how I'd do it.