We had our house pre-wired for the car charger and they installed 40A (it's the highest they would go, for some odd reason). The wiring is already behind the wall, so it's nice and clean. Though the garage walls aren't finished now, we do plan to finish the garage sometime in the next year or two. We have the HPWC in hand. It's $400 to install the wall connector on the existing 40A wiring and I think we're OK with the 23 mph charging. That said, we have the option to upgrade to 80A or 100A wiring via a conduit (mounted along the wall/ceiling) for another $350. 1) With the 48A charger in the car, what's the max amperage we'd want to get that's actually going to be useful? 60A? 2) Is it worth it to upgrade the wiring and breaker and have that external conduit, or, given that we don't have a daily commute, should we just stick with the existing 40A line? Our S (arriving next week!) has the standard 48A charger onboard. We don't drive a ton regularly, though we will take short road trips over the weekend one or two times a month, FWIW. Thanks in advance for your opinions and experience!