Charging Model 3 via HPWC - "Voltage Too High" Found this interesting thread on Model 3 and 277V charging. Seems the OP had trouble charging even though Model S and X charged fine. There's some background on the subject in the thread as well (TL;DR: 277V was supported on the Gen2 HPWC but support for the config was dropped from the manual and such for various reasons). One thing I would like someone to test is to try to charge a Model 3 on a 277V HPWC where the voltage is at or lower 277V due to line quality (saw one screenshot of someone charging at 264V) and see if that works. I also am guessing that perhaps due to the way the Model 3 senses voltage and ramps the initial load may not be as high, so the voltage would read higher and trip the over current protection more easily. Also kinda wish 277V was more supported from the get go at least for NA, as it would have simplified some commercial installs, but kinda of too late for that now.