The problem I have with the numbers presented is that they all deal with power, not energy which is power*time. The right units are kilowatt hours not kilowatts. I do believe that measuring the energy is a fairly trivial exercise but the numbers presented do not show this; they show power which is not the same and only part of the story. And not the interesting part either. The way this is presented smells of fakery because it would be easy to do the right measurements and calculations, they are just not being done and sufficient detail is not provided to do them at this remove.