This is probably an odd question, but many of you here already own EV's so maybe you can answer it for me. My neighbor has a Lexus battery/electric hybrid and when he is driving in or out of the neighborhood and it is running on electricity, it make a very audible whine. It is actually much louder when the ICE engine is running vs the electric motor. But I do not recall fully electric cars being loud like that... Any explanation? I think that I read from the reviews here that the Hummer is actually fairly quiet.