Its being sold as plug and play, but there are nuances. The kit itself is pretty much plug and play - you buy the box, plug in some panels, then plug it into a mains socket. Simple. Its what comes next after you plug it in that is being glossed over.
If you have a nice new house, with modern wiring and a smart meter, then you are probably good to go, technically. However, you still have to inform the grid operator that you are now putting power back into the grid.
But what if you have an older house, with legacy wiring and distribution panel? Its been suggested that you can upgrade your RCD's, but that only works if your breaker panel is able to take modern RCD's - older ones can't.
You might have a traditional mechanical electricity meter. Some can go backwards, some can't. Either way, next time you do a meter reading, your supplier will notice that your reading is much less that what it used to be, or even less than the last reading. To them, that smacks of fraud - expect a red light to go on.
Whats the requirements for securing the panels? Zip tying them to the balcony good enough? Probably not but if the wind takes one and clobbers someone, pretty sure you are to blame.
Do you need to tell your house insurance? Not seen any clear guidance on this, but technically an insurer could argue that this is a substantial change. Any issue that arise, its on you.
Live in a rented property / block of flats? Need to tell the landlord? Whats the impact on the other residents in the property? All unclear.
Don't get me wrong - there are a lot of pluses to all of this. It's just that the downstream implications have not been worked out yet. I am going to wait until all the legislation has been passed, then see what happens. I already have a sufficient off grid solar rig, that is good enough for now.