It takes $100 of batteries to store 15 cents of electricity. What kind of cheap storage are you envisioning?

You could look into cheaper batteries, as there is no need to use the latest and greatest technology. Supercapacitors might also be an option.

It's all an economic sum, really: when do the higher connection fees and increased demand pricing outweigh battery cost? We are already seeing grid-scale battery storage being used in practice, applying that to a more local use case might not be that unrealistic.

Besides, if the alternative is no charging station, you can probably charge significantly higher fees.

A battery is a box of minerals. It can never cost less than the commodity value of those minerals.

More battery = more minerals. Iron law of batteries.

There is no cheap way to store large amounts of electricity.

EVs are great when in used in the right applications, but trying to make them work for everyone and everything is just going to tarnish the platform.