Apparently this is all the rage in Germany (and China) where you can buy a kit at the supermarket for 500-600EUR and then you simply hang the solar panels over your balcony and plug them in to a wall outlet to reduce your net usage.
I was trying to do research on why we don't have this in the US and it doesn't seem like there are any particularly good reasons for it other than sclerotic response to "new" technology.
Seems like an incredibly cool idea to make apartment dwelling even more sustainable.
non-archive link: https://www.dw.com/en/mini-plug-in-solar-panels-are-they-worth-it/a-66240262
No, the problem isn't the local house wiring.
The problem is back-feeding power to the power lines without a power lock-out device.
You don't want to kill a power line worker trying to get your power back online.