[borisk]

This is an interesting idea and I wish you a good luck building a profitable business around it.

Before starting to apply voltage to a home electric gird, I guess you need to disconnect it from the central grid - how do you do that? Or do you detect when the grid goes down and comes back up?

[chadconway]

Pila detects when the grid goes down & when it returns. This is done by all home batteries & Pila is no different.