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?
Safety concerns.
There’s a lot of regulation around the way that household circuit breakers are installed. Those regulations have been developed over decades of problems caused by electrical wiring. A lot of people died to produce things like the NEC. The rules are literally written in blood and fire.
Plugging an independent power source into an outlet to distribute to the rest of the home wiring bypasses a lot of the safety. It means there’s a live power circuit that is not controlled by the local breaker panel, or the building’s main circuit breaker, or anywhere beyond the device itself.
Among other things, this creates a hazard for firefighters. It means they can’t reliably cut off the electricity for a burning building, so they have to be more careful when entering the building (because there may be exposed live wires) and they may have a harder time putting the fire out if electric sparks keep reigniting it.