Shading Issues

[Reggie]

Hi everyone.

I've been MCS accredited for a couple of months now and have a few jobs done. My latest quote is for a system on an east facing roof (photo attached). The customer request is for the largest system possible. I am tying myself up with shading issues during the winter months from the gable end and the chimney. The obvious answer is to put a row of landscape panels at the top of the roof but this would not maximise the space. My understanding is that the sun will be 16 degrees above horizon in the winter and 65 degrees in the summer, therefore the lower part of the roof will be unshaded for the good spring to autumn months. Am I worrying too much, or should this shading be taken into account? Any views would be appreciated.

 

[SolarCity]

I think the shading should be taken into account but I doubt it will make an install uneconomic. The fact the roof is east facing worries me because it the protruding roof section will have quite an impact in the evening.

The only real way to work out just how much it will affect the yield is by modelling it in 3D. Anything else is a guess.