Just an added note to remind all that the energy loss equation has the amperage component SQUARED. Thus, you'll want high voltage and low current.
FWIW, I have found that if we charge our two MS's at higher amps (30 to 40 amps, IIRC, off of our NEMA 14-50 outlets) there is a noticeable voltage drop. Thus, we typically charge at 5, 10, or 15 amps overnight which keeps the voltage high/unchanged, all the wiring nice and cool, and is seemingly a comfortable trickle charge for the battery.
Wish Tesla would provide some insights on this for the technically curious.