Yes and no. If I draw an extra 10 kWh one random hour and export 10 kWh back at some other random hour, this costs the utility essentially nothing. The transformer is already there, and other customers near me will consume it possibly without even involving the transformer.
(I say “essentially” because there is some tiny loss in the system, but that’s maybe 2%, not 70%.)
Absolutely false. Wholesale electricity costs vary wildly with time of day. You’re saying the grid should be forced to act as an unlimited battery for free and that just doesn’t make sense.
(I say “essentially” because there is some tiny loss in the system, but that’s maybe 2%, not 70%.)