Anyone installed the Solar powered roof ventilator fan?
This is not the mushroom wind turbine.
Saw a few reviews and video, seems good, come with brushless motor and quiet.
Some company list 2K+ rm, online 800rm+(without installation).

Thanks for valuable feedback. How many Watt is your model? I saw they have range from 10 - 60 Solar watt .
Proper themal insulation as in roof linings and stuff?
I am more targeting expelling hot air trapped in between ceiling and roof.
I may drive moisture from toilets to ceiling with ceiling ventilators like Khind / Airgard.

I think for burglary access is subjective.
The installation require a hole probable 10inch wide, or a replacement of 1 or 2 roof tiles. So it depends how accessible is your house roof.
It will not likely be bolted in but clipped, and silicon gel to prevent water flowing under.
and it should be installed at the ridge/apex of a roof ( the tip point) and under the Ridge flashing ( metal sheet that runs across) to let the rain water flow over the flap of the ventilator bottom