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Default IAM Values in PVsyst are Non-physical


kjs55
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PVsyst v6.81

1. Glass refractive index (n) appears to be 1.526, not 1.53 as shown in Hidden Parameters.

2. It does not appear that n=1.37 for EVA (in Hidden Parameters) is used for "Normal glass" or "AR coating" scenarios.

3. With the following assumptions, I get the same (tab-separated) results as PVsyst:

--No ARC

--Glass n=1.526

--No refractive index applied for EVA

AOI IAM_PVsyst IAM_kjs55

0 1.000 1.000

30 0.998 0.998

50 0.981 0.981

60 0.948 0.948

70 0.862 0.862

75 0.776 0.776

80 0.636 0.636

85 0.403 0.402

90 0.000 0.000

4. With the following assumptions, I get slightly different (tab-separated) results than PVsyst:

--ARC n=1.29

--Glass n=1.526

--No refractive index applied for EVA

AOI IAM_PVsyst IAM_kjs55

0 1.000 1.000

30 0.999 0.999

50 0.987 0.987

60 0.962 0.961

70 0.892 0.889

75 0.816 0.811

80 0.681 0.674

85 0.440 0.433

90 0.000 0.000

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