KentuckyKen saved me maybe $400 by asking only for a NEMA 14-50 (and not mentioning electric car at all). I mentioned my father in-law's RV which isn't a lie (he does have one with a 14-50 cable) and let them assume that's what its for. Anyway, my quotes went from $600 to $150-$200 once I only asked for the 14-50 RV connector. Anyway, $200 later I have a real 14-50 (including 50 amp breaker) installed in my garage. I then paired that with a level 2 EVSE 'travel' version that plugs into NEMA 14-50 "campground" plug. Of course the Clarity will negotiate about 30 amps max. So whether 40 or 50 amp circuit, the EVSE and car will do ~30.
I chose to buy a 40 amp capable EVSE (which the Clarity cannot max out). In my case the 30amp version just wasn't that much cheaper, that and the cable length was shorter on the 30amp. So I did the 40amp capable EVSE plugged into to a 50amp plug. The one I got is on Amazon. It's a Jekayla (sp?) unit which has been OK so far. As a new unit it has a very tight fit, which is my only complaint. i.e. I'm moving it around a bit to disconnect-- not smooth. One other in this forum (same EVSE) claims it got looser with time, so a little too early for me to recommend my EVSE, but I am pleased with the price and that it's functional.
BTW - I can get a 80% charge from zero in 90 minutes. I come home now and plug in, even if I only have an hour. That hour buys me about 15 miles of range.
-Dan