I have a NEMA 14-50 socket and one of the (discontinued) wall chargers with a 14-50 pigtail and plug. Unfortunately, the charger will only do about 15A (240V) since it indicates overheating and reduces power. I set the car to charge at 1AM so it does not conflict with most other electrical load. ($0.08625/KWh) My house main floor is about 3 feet above ground, I have a50A breaker (on 100A service) 30 foot run from the panel in the basement, then the wire goes through the wall to the attached garage. It was 8Ga but we re-ran it with 6Ga. Theoretically it will do 40A continuous now. There's about 2 feet vertically in conduit to the outlet box. I replaced the el cheapo Home Depot plug that had a melt-down (loose connection?) with a Hubell 9450 plug (about $160) but still get the overheat warning on the charger.
The thing that gets me - some pretty garages. How do you handle the snow buildup? I have an insulated garage (but no heat). Every winter I get huge puddles in the garage and a few times each winter have to vacuum up the water and dump it at the curb. Every spring I use an ice chipper tool to scrape off the accumulated piles mud that is mixed in with the slush that attaches to the bottom of the car and drips off the wheel wells.
I contemplated drilling a hole in the garage floor to drain the puddle, not sure if that's a good idea...? Presumably then the water would seep into the weeping tiles and out the sump pump...