Sorry, for jumping in the discussion a bit late. I agree that the main concept is just wrong. But the idea slightly modified could work I think. For example, there is a better suited place along the roads, the noise blockers (two walls on the two sides). There you can have almost the same surface, you dont need the stupid road construction glass, and wrong angle. The cleaning could be by automated way. The micro inverter idea is useful, as there will be less surface influenced in case of a failure, and the inverters would reduce the cabling cost also. A south facing wall would be ideal. Well, north facing down there in Ozzy.
Also, the road type could work in niche applications. Say, you are building a technology related bug conference hall/tradeshow place, you could make the parking lot from this. 99% of the time the parking lot isnt used, and you just need to put some speed limit everywhere, and not allow trucks to enter. It would be a nice attraction alone, telling people where to park, sorta guiding them. Probably it wouldnt break even. But that wouldnt be the point it would be part of the building, the attraction. People pay crazy amount of money on useless constructions, even though it is pointless. Think of it as the Eiffel tower of the 21 century.