To be fair, on the hobbies forum, one of our posters says the same thing.
Solar panels are black and do get hotter than e.g. roof tiles in the sun and restrict air flow.
There is some evidence that some extra heat is sent into the roof structure, but then depends on the insulation and what is behind the roof. If this is an attic room then maybe it could have an impact.
A normal loft space, no.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
we have black asphalt roofing tiles ... yeah, they get hot, but don't worry the roof sheeting underneath ... in much more direct contact that your solar panels (which are clear of the roof).
that said, still nothing to stop insurance companies saying "we won't insure you ..."
"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.
Solar panels are air-gapped from the roof, so the secondary thermal transfer will be a lot less than direct solar absorption, particularly if the roofing is a dark color. Since the solar panel temperature is typically below 200 degF, its thermal loading on the roofing should much lower than that of direct sunlight.
The thermal issue isn't necessarily the sheathing, it's the tar paper or equivalent that needs protection; traditional tar paper can desiccate and stop providing moisture protection.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!
