I don't have panels in the UK Stoop but just a thought on the pigeons. Garden Centre's ect' sell rolls of fine green plastic
mesh for a few quid, designed to keep birds off the crops. If this was stretched over the panels it's fine enough not to
interfere with the operation and if you could get a large enough roll to fit over the roof, front to back, you could fit it
yourself (using a bit of ingenuity) and a pair of ladders.
And if you stretched it over the guttering's it would keep the leaves out too.