Maybe you spent some time as an amateur trying to work things out, from the commercial information on the internet, it tells you not much useful, unfortunately, it is all mostly funded by extracted energy utilities companies, who don't want you to know you can have energy for free.
Batteries are not needed, hydrogen backup is much better.
Try searching for fuel cell microgrid in alibaba, the kinds of equipment needed are there for sale, China is streets ahead with this technology, despite again propaganda claiming they are not.
Otherwise if you wish to read my story "The money-fuel tree", "The missing sign", and stories linked to those might help.