They choose to believe in things they know aren't true, and they call it faith.
And that's how they think everyone else comes to their own conclusions about reality as well. They think we're taking the existence of homosexuality on faith, which is why they think they're making some kind of point when they say they don't believe in that.
A) If it's on a high balcony that people might be passing below, I'd really prefer it to be attached with something a bit more substantial than zip ties... If sun exposure degrades the zip ties and then a sudden breeze causes a panel to detach, it could cause pretty serious injury to someone below.
B) There's also a potential electrical public safety issue here. If the apartment building maintenance crew shuts off power in order to work on the electrical system, is there anything to prevent these panels from backfeeding into the apartment's electrical system, making some of the wires still live? Likewise, if the power company has to shut off power to do power line maintenance, is there anything that prevents these panels from backfeeding into the power lines when they're supposed to be disconnected and safe to work on? (Grid power transformers will work in reverse, increasing the (probably) 120V from the solar panels into much more dangerous transmission voltages in the kilovolts. At extremely low amperage, but could still be quite dangerous to unsuspecting linemen.)
C) There's also a third potential safety issue. Household electrical outlets (and the wiring for them) are only intended to carry 15 or 20 amps, depending on the type. Normally if you exceed that, then a breaker will trip or a fuse will blow, protecting you from overloading the building's wiring and potentially causing a fire. But if this plug-in solar system is connected on the same circuit as any other outlets, the other outlets in the circuit could potentially draw more than the rated current because they're drawing some of that current from the solar system, which doesn't go through the breaker. An electrical load that was just the right amount of 'too high', if connected to the same circuit as the solar panels, could potentially draw too much amperage through the wires, causing them to heat up and start a fire without the breakers or fuses being able to protect you. In an apartment building, that's especially dangerous, as the person who installed the solar isn't only endangering themselves, but potentially also endangering everyone who lives in the building. (The higher the power output of the solar system, the more dangerous this becomes. A mere 220W system probably isn't adding enough amperage to seriously exceed the safety margin ... probably ... but it's still best not to risk it.)
I'm all for installing your own solar panels, even in an apartment, but please -- do it safely!
Attach it with something stronger and more reliable than zip ties. Ensure there's a system in place to prevent backfeeding in event of a power outage. Ensure that a plug-in solar system is plugged into its own dedicated circuit, not sharing the circuit with anything else.*
*It would be okay to plug multiple plug-in solar systems to the same circuit, as long as the total power output of all the systems combined is less than ~1800W. And even if you exceed that, the worst thing that will happen is that the breaker trips or the fuse blows. Just make sure they're not sharing the same circuit with any electrical loads.