Photovoltaic system company Roto / Sunroof Pur experiences?

Hello,
Can someone perhaps answer a few questions about a photovoltaic system for me?
My wife's cousin is a sales representative at the company Roto. He could get us in-roof systems at a good price.
Does anyone have experience with their product “SunRoof Pur”?
What are the advantages and disadvantages compared to an on-roof system does an in-roof system have?
I have heard that an in-roof system heats the attic more than an on-roof system because the air layer between the tiles and the photovoltaic system is missing. Is that correct?

Thank you very much for your answers.

Hello,

...I have heard that an in-roof system heats up the attic more than an on-roof system because the air layer between the tiles and the photovoltaic system is missing. Is this correct?

Yes!

regards

Hello Hawk-14,

I am searching the internet for references for the Sunroof Pur system from Roto from the year 2013. I would like to read reviews about this system.
Did your cousin build the system or not?
Thanks for the feedback
best regards