Check with your local utility. Here, (MA, USA), we can't run classic balcony solar (feeds the grid when you produce more than you consume). But we can run zero-export solar (never feeding the grid, but dialing back the inverter when you produce more than you consume).

The economics behind battery-backed zero-export solar are interesting because they keep your local solar energy local, and you can extract maximum benefit from the system. Also, if you have enough batteries and TOD rates for grid power, you can store grid energy when it's cheap (overnight) and use it locally when it's expensive.

Our local utility, National Grid, has a program where, if you have the right inverter-battery combination, they will buy power from you during peak-load periods, and you can make a couple of grand a year.

Batteries, especially local ones, change the dynamics of power generation and use. It's amazing and wonderful.