How do I know no one will use the hot tub while the car is charging? Because I'm the one who maintains it and the only one who turns it on. My wife has never used it while I was out. Also, that is the purpose of the device, right? In the event of an 80A current draw it will shut the charger off. It seems to be a perfect solution for our needs, vs the $10k service upgrade.
Thanks for the heads-up about the possibility of the charge settings being reset after an update. I'll be sure to keep an eye on that.