Roof pitch

[db9go]

What is the optimum roof angle for solar and do you need planning for the solar
We are thinking of putting up a new building which is south facing with a clear vue

 

[Pogit]

I have a US book dedicated to sustainability, It suggests 30-40 Deg.
My guess is that the PV surface needs to be as close as 90 Deg to the sun.
I considered the lower value for grain store but this compromises the height to eves. or makes the ridge outside allowable height.
My next idea was for a roof of a "Northern Lights" configuration.
I have yet to decide but it passes my mind that a steep pitch would be more acceptable if you have in mind the building could end up as a dwelling.
The world is changing quickly. I was told by someone who should know that UK plans to plant 35000 acres of trees a year. Biomass will get priority as it is the only way to produce jet fuel. The present plans run to 2050.

 

[TheTallGuy]

Optimum angle will depend on latitude of the site because you are looking for as close to a 90 degree angle of incidence from the sun rays to the surface of the panel. The angle also varies throughout the year & depending on what the power is used for, you may benefit from tailoring towards the winter optimum to get the maximum from the winter sun.