Distributed rooftop isn't supposed to be about feeding the larger grid so much as topping off local demand right when it's needed.

I'm kind of eccentric so I got a humongous array; even then at peak production I was running the A/C for 3-4 houses in my cul-de-sac other than my own. Most installations around where I live are like 1/4 of the size I put up and rarely feed much back.

And home-scale batteries are getting cheap enough that excess won't necessarily need to get fed into the grid anyway.