In article , The Other Mike
writes

Just wonder what would happen if you had such a wall covered in Solar PV.

If the wall forms the boundary of your property you wouldn't have been
allowed to it in the first place as the panels wouldn't be on your
property, they would be overflying the neighbour's.

In theory you can't have anything on a boundary wall, not even a window,
so if you ever have part of a plot of land to sell it's best not to mark
the boundary with a wall but put it at least a meter away.

Not that any of this helps the o/p, the answer to that, I don't know.
--
fred
it's a ba-na-na . . . .