Oh, yeah, I looked at that. I can get a couple hundred watts of panels that will realistically generate about 300 watt hours of power on my balcony on the sunniest days, given that they won't be mounted at a very good angle. I can have it charge a battery pack that'll last a few years. Then I get about 90% efficiency if I'm lucky with the inverter. Even at $0.50/kWh, that's $0.15/day I'm saving or about $50/year if we just assume a cloudless year-round summer. That'll save me just enough money to buy a new battery when the first one gets old.

Solar power will get there one day. Its great for many purposes but its still not practical for most apartment dwellers.

These won't even power a small portable AC, if you have a balcony and it's on the south side and you have enough m² to angle the panel halfway properly, you'll be lucky to generate 500 W.

That's only half the power draw of a small AC unit, and doesn't even get into the fact that in most places you cannot hook up a solar to your house without an approved inverter with appropriate safety features (otherwise you'd endanger the linemen in case of an outage). Where I live if you still have an old installation with net metering, you also pay a tax based on the inverter capacity (which is good because net metering is bullshit subsidies from the poor to the landowners).

PV energy is good, but apartments are not a reasonable use-case for it. Residential PV is inherently a tool for privileged house owners, and if PV is to help apartment dwellers it's through grid-scale renewables and dynamic pricing and/or smart grids that provide cheap power for A/C on sunny summer days.