Maybe they do it differently in CA than FL, but I have never seen any device that measures "how much their transformer" sends installed in any normal situation.

Maybe they do it differently in CA than FL, but I have never seen any device that measures "how much their transformer" sends installed in any normal situation. Indeed. I don't think that gets measured anywhere, other than in a general "this areas utilises "x" Mwh, so on average, section "y" would use "z"