squisher
THE CALM ONE!!!!
Well if you've done that then it wouldn't be a guess whether they read the meter wrong or not. You'd know.
They call me, or I call them.
I have no idea how they do things in Japan .However in the US of A they know exactly how much power goes into a grid or sector and how much gets billed for .About once a year someone from the electric company comes out to my shop to check for "leaks".