If so, please ask your representatives to copy Germany's "Balkonkraftwerk" rules.

We've got one, cost €350 including delivery and a balcony railing mounting kit, could've been €250 if we'd collected and not had the stands. Whole thing is trivial DIY, no skill or training needed: you literally just assemble the kit and plug it into a power socket, register it online as a small power station, and you're done.

Sure, the legal limit of 800 W output sure isn't a huge supply, but at that cost it's also a no-brainer — at €350, it will pay for itself in 1y8m.