I did not say I was wrong. I said I could be wrong. Not the same thing. Or is English another subject that you fail to grasp? Dr. Math has not yet responded to my email. YOU were the one who initially consulted him - as he was the primary reference on the wiki page that you first mentioned.

You have said a lot of stuff, but you have NOT answered the question I actually asked - the same question many times. What does "kwh" mean? What does it stand for?