I finally did the test I promised a few post back and observed temperatures as the car charged. I hadn't observed the final approach to 100% before since I had been letting the car charge overnight.
Here's the readings I got with an IR thermometer. They are in line with yours OP.
Time, Garage wall, Hood, Fender, Connector, Charger Cable, Bottom of Frunk
1:14pm 78 88 87 79 78 ? 37%
3:15pm 82 90 89 95 102 101 (Forgot)
5:15pm 83 93 93 98 102 107 74%
7:15pm 86 96 95 100 103 110 89%
9:20 pm 86 96 95 100 102 110 99%
10:26pm 88 97 113 105 93 143! 100%
So when I went and check the car at the end, it was like your wife said... the fan was on full blast and there was a lot more heat. As I understand it this final step is when the car is balancing out the charge across all of the batteries in the pack. It's quite surprising how hot that gets and how long the car stayed in the 99-100% range. It turned off just as I was leaving the garage and it appeared the charge was finished.
Also for grins several days ago, I let the car charge on a DC fast charged for about 30 minutes, but going from about 35% to 88% I think it was. Much to my surprise there was no significant heat to be felt. I guess the efficiency when not using the car's built-in converter is much better.
Last edited by StormRune; 05-15-2019 at 10:49 PM.