also worth keeping in mind (or remembering from your high school physics or mechanics);
efficiency is output/input. it is always < 1, or if expressed as a %, it is < 100%.
efficiency can never be > 100% because output can never be > input. this is a fundamental fact in this universe.
my neighbour believes the earth is flat. he really and truly does. and there is nothing I can do or say or explain can convince him it isn't.