solar is solar, and can go to grid. Battery is battery, and no matter how it got charged, it cannot go to the grid, only your house.I'm sorry I am being slow. I really must be misunderstanding something. Let's say I have 4 PW's and charge them fully with solar during the day. Why can't I push all of that solar back to the grid during the peak hours, of course after powering whatever home is demanding during that window?