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Unexplained small nearshading loss with no objects


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We have been modelling rooftop systems and have found that there is always a near shading loss regardless of objects. We simplified these to just a single module flat and found even then we would see a loss.

The loss is small at 0.136% but we cannot understand why there is a loss. We also noticed that with a 7° tilt this loss was reduced which we also cannot explain.

Any ideas about why this shading loss occur ?

Many thanks

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  • 3 weeks later...

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