I've wondered if the ideal place for battery storage would be substations. They usually have free space where could put some containers full of batteries. It wo

I've wondered if the ideal place for battery storage would be substations. They usually have free space where could put some containers full of batteries. It would scale better than each house having their own. It can serve a whole neighborhood, and provide power if the grid goes down. The only thing that can't help with is when local distribution goes down.