"It's not that simple. Solar is only really practical if it fits into the grid system, otherwise there's no real point. The energy it gives you goes up and down

"It's not that simple. Solar is only really practical if it fits into the grid system, otherwise there's no real point. The energy it gives you goes up and down, and not in sync with your own household needs." Doesn't the Tesla home battery change all of that ? Solar on the roof and one or two Tesla batteries in the house and ... no grid usage whatsoever, correct ?