Source here with detailed information for each state in case you are interested in getting a balcony or window mounted solar system
Plug-in solar lets anyone generate free electricity — no roof, no permit, no contractor. A single panel on your balcony can meaningfully cut your bill, especially as rates keep rising.
Found it in this discussion: !https://slrpnk.net/post/39512229/22991609
Is it already legal in your country/state?
That’s not how laws typically work. Everything not expressly declared illegal is legal by default. So that’s a legitimate question.