Near Shading Losses Vertical E/W system

[RobertH]

I have a small problem concerning near shading losses for a vertical biafacial system E/W oriented.

I planned to optimize pitch distance according to near shading parameters but the numbers I get do not seem realistic. Even for high pitch distances of 25 m I still have around 5% near shading losses.

Even if I set the pitch distance on e.g. 1000 m I get near shading losses of around 1.5%.

The system has a height of 2.2 m, tilt 90°, azimuth -90°. I tried both, simulating it as unlimited sheds and modelling it in the 3D near shading scene.

I hope someone can help, thanks in advance.

Robert