Hi All,

Currently trialling Skelion however I'm having some trouble working out the shading losses calculation within the 'basic report' of Skelion. The report shows 'general total' shading losses of 0.7% which appear to be calculated from the average of the shading losses from each module from the array, which seems to make sense. However, the basic report also shows a list of monthly average shading losses ranging from 0.13%-5.49% which would then work out to annual average of 1.6%, which clearly doesn't correspond to the 'general total' figure.

I am struggling to understand the relationship between the two data, and therefore unable to justify the results in the analysis for my client. Is there a way to find out how these figures are calculated in the software? Are the 'general total' calculation losses taken using total annual daylight or using daylight from a single day of the year? I am also wondering whether the 'general total' losses calculation takes account of varying daylight hours as the year progresses, but perhaps the monthly calculation does not? I'm probably barking up the wrong tree and there is a simpler answer to be found here. Can anybody please explain the difference?

Any help much appreciated. Thanks

Sam,
UK