> My unit has an individual circuit breaker box, but how would solar power be fed into such a system? It would be chaos, and the management would have no way of regulating or maintaining such a bizarre setup.

The balcony solar setups are sized to be small enough that they can be fed into standard systems.

There’s no “chaos”. It just offsets consumption a little bit. New electric meters have been able to account for or at least not get confused by reverse flow should it occur at the small levels that balcony solar setups might produce.