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 โ 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 is exactly what it is, i have a set installed. Just a google for a dutch site for example : https://www.simply-solar.nl/products/plug-play-set-1-zonnepaneel