Let's say it takes n batteries to store electricity produced one day and use it the next day. Then it takes 10n batteries to store electricity produced during t

Let's say it takes n batteries to store electricity produced one day and use it the next day. Then it takes 10n batteries to store electricity produced during ten days and use it during the next ten days. With synthetic fuel let's say it takes m fuel producers / consumers to store electricity produced one day and use it the next. Then it still takes m fuel producers / consumers to store electricity produced during ten days and use it the next ten days. The only thing you need to scale up is your fuel tank, but that is very cheap.