This is still a ways off for me, but given my future plans (in 2-3 years I hope to be a Model 3 owner) this may become an issue for me. A lot of homes in the area I would like to go to are remodeled homes from the '60s-'70s, which means that some of them may still be stuck with aluminum wiring if it wasn't replaced yet. Assuming the home wiring wasn't upgraded to all-copper in renovations, I'm wondering is it safe to add on a NEMA 14-50 outlet in such a house? HPWC? What other considerations were taken to install such an outlet in such an environment? Did you decide to bite the bullet and replace all the wiring to copper? Apologies in advance as this isn't a model-s question per se, but there doesn't seem another place for me to put this.