There is an old thread asking this question, but it went off topic and died about a year ago. Question never answered. What is the voltage of a Model S battery when charged 100%, that is, a full range charge? From other threads, it appears that the maximum allowed cell voltage is 4.1. Using 4.1 volts, 16 modules, and a multiplier of 6, I come up with 393.6 volts for a fully charged pack. Seems reasonable to me, as the Model S Emergency Response Guide says the battery is 400 volts, which is what it would be if cells were charged to 4.2 volts using the same formula. (Actually 403.2 volts) Interestingly, that is exactly what a LEAF battery voltage is at full charge - 96 cell pairs at 4.1 volts = 393.6 volts, and the LEAF Emergency Guide says the battery is 403.2 volts. There is an old Tesla document that says the Roadster battery nominal voltage is 375, which is what you get using my formula at 3.9 volts per cell. Yes, lots of guessing here, anyone know?