This is how I charge also. I’m going to eventually have a hard wired EVSE mostly for solar timing but I usually am fine at 12-16A on a NEMA 6-20 or 5-20. My $12

This is how I charge also. I’m going to eventually have a hard wired EVSE mostly for solar timing but I usually am fine at 12-16A on a NEMA 6-20 or 5-20. My $120 unit off Amazon is more reliable than the $1200 Porsche charger I also have (and that is while ignoring the open and unresolved recall for undersized wire used on the plug tail). My guess is warmth on the unit is a dumb inefficient DC transformer for the controller. There is an Energy Star spec for low standby energy use that most of these inexpensive ones don’t hit.