Solarpunk technology

Usually it's in places where it's so unusual to feed back power to the grid that the grid isn't adjusted to it, or the local regulations aren't updated for it, so you either have to make sure you don't feed back power or you need a completely different electricity contract with higher connection fees so household solar can't pay back enough to cover the fees. It used to be a problem in parts of Sweden a decade ago, but now it's mostly fixed here.