Utah passed a balcony solar bill; I think they're the only ones so far. Oregon tried in the short session last year, but it got shut down by fire marshall type people, sadly.
Interesting on Utah. Re Oregon, was the fire Marshall acting in good faith in that scenario? Recently reading about fire-truck size in the US I start wondering what the motivation is for some views about things around fire safety (amongst a million other things). Maybe good faith is too cynical. Maybe just hard-to-change attitudes.
I saw that Virginia and Maine have a little bit of momentum towards balcony solar. This is the video I saw that in: https://youtu.be/2RqhK2w8rrA