Replacing concrete interlocking tiles with solar roof

theboylard

Apparntly the installed cost for Tesla's "solar shingles" is approx $42/sq ft.

Which is not bad actually.

They are also launching a close fit "normal" panel for fixing onto rooves, rather than replacing the roof.
Circa 325wp and 21% efficiency. No clue on rpicing for these.

frozen_wastes

Exiled_Tyke wrote: »

Is there a significant difference in the performance of integrated panels? I know that without the airflow behind them they get hotter than the more usual over-roof panels, but how much difference does this make to the output?

Remember reading somewhere that there was a 3% dip in the output of the solar panel when it was mounted flush with existing tiles.


Now an additional thought going through my mind is that if you have a solar roof made of panels (not solar tiles), is there actually a need for roofing felt and sarking underneath? As I understand, roofing felt & sarking is used to stop the tiles lifting in windy conditions. That shouldn't be an issue if the panels are secured properly. If you remove the backing, then the panels have ventilation. Is my reasoning flawed in any way (e.g. building regs)?

Kernel_Sanders

frozen_wastes wrote: »

As I understand, roofing felt & sarking is used to stop the tiles lifting in windy conditions. That shouldn't be an issue if the panels are secured properly. If you remove the backing, then the panels have ventilation. Is my reasoning flawed in any way (e.g. building regs)?

Roofing 'felt' is a back-up so that any rain that penetrates through a broken tile or slipped slate can drain down to the eaves. The idea that solar tiles are so water-tight that they can dispense with such a precaution is flawed, and the building regs were tightened recently so that if you recover your pitched roof, you now have to have a breathable membrane under the batts, which themselves have to conform to new standards.

Mojisola

We replaced the roof of an out-building with this method - no tiles around, just panels.

https://www.windandsun.co.uk/products/PV-Mounting-Structures/GSE-Integration-Roof-Integrated