I have my HPWC install happening in about 2 weeks. I've ordered my car with dual chargers, but until now assumed (erroneously?) that I'd only be able to make use of one when charging at home unless I got a new 100 amp line put in. The electrical situation in my home is that I already have a partially populated 100 amp subpanel in the garage. On a regular basis, it looks like I run around 2-3 amps at night, and 5-8 amps during the day off this panel. Reasonably, even with everything turned on, i can't imagine ever needing more than 16 amps total -- meaning that in theory, I should be able to safely run 64 amps to the car, since 64+16 = 80, which is the max rating for a 100 amp subpanel. Reading page 16 of the HPWC manual (https://my.teslamotors.com/sites/default/files/blog_attachments/wall_connector_install_guide_northamerica.pdf) seems to imply that if we put in an 80 amp breaker off the subpanel exclusively for the car, and set the HPWC DIP switches to 64A max, I should be able to make partial use of the second charger in my car. I assume that I'd need to run 100 amp capable wire for the car circuit though... Am I understanding the situation correctly? What if, the unthinkable happens, and while charging the car at the full 64 amps, we exceed 16 amps on the other stuff (e.g. someone plugs in a hair dryer while everything else is maxed out) and I manage to temporarily go over 80 amps total? Would I actually trip any breakers at 80 amps or would I be ok till I exceeded 100?