I've looked into this extensively in the US, and there are three headaches from my POV:

1. Most states require special device certification by a "nationally recognized authority" that doesn't seem to fully exist yet. There ARE devices that would almost certainly GET certified, but aren't yet.

2. Ordering panels is a PITA. Most want to sell you either RV/Camping grade (overpriced), or in too large of quantities (e.g. 10x+). If you want to hit under 1,200 Watts meaning just 2x 600 Watt panels, well, nobody wants to ship that. Most popular panel vendors, don't want to sell single-panels, and you're looking at 500% markup for camping/RV style panels (with often worse performance, and proprietary connectors).

3. "Moveable" panel requirements. The laws frequently don't define what that means or what that looks like. It seems to want to essentially ban a small roof install, but stuff like ground-mounting (e.g. even just for the angle), or securing so they don't blow over, is ambiguous. Plus most laws don't exempt you from planning requirements, just utility requirements, so the local city/county can still fine you for your "install."

What I am saying is: I'm absolutely in love with plug-in solar, but unfortunately being an early adopter in the US is going to be annoying. I hope in ten years it will be almost turn-key, just buy a "kit" plug it in, and you're done.