Solar PV shading issue opinions please

Spinybif

10% shading of roof is normally sufficient to drain all output from the whole array by shaded panel acting as a sump. 

mickyduck55

Thanks well that is nowhere near 10 %

mickyduck55

Mickey666 said:

Pile_o_stone said:

Regulations state that vent pipes that are situated within 3m of an opening window must terminate at least 900mm above the eaves (i.e. gutters). You may be able to cut down the soil stack, but make sure you are within the regs. If you can reduce the pipe so it doesn't cast a shadow, that'd be the best solution.

Or, cut down the stack and fit an external air-admittance valve to avoid the 900m requirement.  Something like this: https://www.drainagesuperstore.co.uk/browse/soil-and-waste/external-air-admittance-valves.html

Yes that would be my choice.. after all I have one inside my house which passed building inspection...

pinnks

I might be wrong but thought you need at least one open stack vent but others can be air admittance - I am sure someone will correct me if wrong...

EricMears

AIUI, there needs to be one open stack somewhere within 3 or 4 houses;  if not, you need one.

mickyduck55

EricMears said:

AIUI, there needs to be one open stack somewhere within 3 or 4 houses;  if not, you need one.

should be ok then... all my neighbours have them...

phsci

"In a multiple housing situation, if all houses were fitted with an AAV, there is a risk that flows in underground drainage could create excessive back pressures on each connected dwelling. Evidence of this would be ‘bubbling’ and rising water levels in WCs and other appliance traps. To manage this risk, it is recommended that the house closest to the main sewer, i.e. the first house, and every subsequent 10th house is also installed with an open stack vent."
https://bpfpipesgroup.com/media/29598/Air-admittance-valves-for-domestic-properties.pdf

gefnew

Hi mickyduck55
This maybe of interest for your problem ,has you have easy access to panels.
https://support.tigoenergy.com/hc/en-us/articles/115005150527-SMA-Power-Installation-and-Commissioning-Guide
regards