I was at the Cranbury, New Jersey supercharging station on Sunday. My car (a 2017 90D) was down to about 25 miles left. There are 4 charging stations there and 3 were occupied, so I took the last one. After the car charged up to about 100 miles (just needed to ensure I got home with enough to juice to spare) - I unplugged and noticed how hot the entire charging unit was (and no, it wasn't due to the fact that it was 90+ degrees out on Sunday). The unit itself was extremely hot - is this normal??