Solar panels on single story extension flat roof - permitted development?

QrizB

Reed_Richards said:

gefnew said:

Like this maybe.

Well yes, but flat panels hardly seems an ideal layout.  

Not ideal, but not as terrible as all that.

PVGIS suggests, at roughly my location, panels at optimum slope (40 deg.) will get me 1.03kWh/yr/Wp while horizontal ones will make 0.86kWh/yr/Wp. That's a 16.5% loss vs. optimal.

Even vertical-but-south-facing panels make 0.74kWh/yr/Wp, which is more than I expected. Now I'm wondering about wall-hung panels ...

Boffinboy24

Thanks all, very helpful

Spies

QrizB said:

Reed_Richards said:

gefnew said:

Like this maybe.

Well yes, but flat panels hardly seems an ideal layout.  

Not ideal, but not as terrible as all that.

PVGIS suggests, at roughly my location, panels at optimum slope (40 deg.) will get me 1.03kWh/yr/Wp while horizontal ones will make 0.86kWh/yr/Wp. That's a 16.5% loss vs. optimal.

Even vertical-but-south-facing panels make 0.74kWh/yr/Wp, which is more than I expected. Now I'm wondering about wall-hung panels ...

EV Puzzle on YouTube had vertical ones put on his east facing wall and they seem to work well. 

Martyn1981

QrizB said:

Reed_Richards said:

gefnew said:

Like this maybe.

Well yes, but flat panels hardly seems an ideal layout.  

Not ideal, but not as terrible as all that.

PVGIS suggests, at roughly my location, panels at optimum slope (40 deg.) will get me 1.03kWh/yr/Wp while horizontal ones will make 0.86kWh/yr/Wp. That's a 16.5% loss vs. optimal.

Even vertical-but-south-facing panels make 0.74kWh/yr/Wp, which is more than I expected. Now I'm wondering about wall-hung panels ...

Flat roof panels will also need cleaning since debris may stick before rain can wash it off. I think leaves can cause generation issues if they stick to enough cells.

I've always been a fan of vertical PV panels. they solve the problem for folk who don't have a roof, or suitable roof, and whilst gen is lower, they do have a strong winter bias which helps economically. But ...... unless anything has changed, wall mounted PV does need PP too!

How about BIPV, building integrated PV (very old article):

The school with the largest solar facade in the world