They can only be serviced

I don’t think this should be a concern, I’ve had them on my roof for 3 years now and not touched them once

Is this really the best way to place them?

Seems so:

But this is just a pilot program. If the system works safely on a busy rail line, it could point to a new way of expanding solar power without covering farmland, forests or mountain slopes with panels. That’s perhaps important in Switzerland, more so than in other places, where renewable energy is urgently needed, but new solar projects can face resistance when they move into cherished landscapes. NIMBY is sadly a global phenomenon.