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?
#1 can be especially important in places like the northeast US where some houses still have 100 year old knob & tube wiring. When we bought our house in a Boston suburb 10 years ago it still had some live knob & tube. Our insurance company required us to remove it all & replace it.