Absolutely false. Current flow is metered using current transformers.
full disclosure: I install high voltage switchgear for a living.
full disclosure: I install high voltage switchgear for a living.
Like, if power from several different sources flows into a single substation before it goes to your home, you know exactly which source created the electricity you're using?
And if I purchase power from a 100% renewable company, is it always only electricity from their generators, never ever mixed in with power from other grid sources during downtime?
No, it's just best estimates based on generation, consumption and flow.
That's like taking a bucket of water out of the ocean and saying you know where it came from. Sure, it might have come from the nearest estuary, but odds are it got mixed in with water that originated somewhere else.
The question isn't even well-formed. It's like playing tug-of-war and asking exactly which player on the other team you're pulling against.
But I can tell you, each line is measured closely and billed accordingly. There is no guessing.