For european individuals, yes. For european nations, not in the least. They try to avoid independent consumers and producers of energy with all the regulations they can throw to them.
Legislation is, in fact, specifically made so people (i.e. landlord) actually can't easily stop you from doing this.
It's not clear to me why, for example, 2kW of panels which are also limited to 800W need need the special plug.
Hopefully I'm wrong!
"With a standard Schuko plug, a maximum of 960 watts peak is allowed on the DC side, regulated by DIN VDE V 0126-95. With the Wieland connector, a special feed-in socket, the limit increases to 2,000 watts peak. Anyone wanting to operate a system with up to 7,000 watts of module power will need a permanently installed feed-in socket, thus entering a range that is technically possible but also more complex to implement."
Shockingly unbureaucratic for Germany.
There is, as one could imagine, somewhat more burden for larger systems that require the involvement of someone who is actually an electrician, but I don't want my neighbors to be able to DIY fire hazards.
God forbid you produce more, or try to sell it for market prices or even sell it directly to other individuals through a microgrid.