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transposed irradiance for vertical E/W modules


hcolin

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Hello,

After importing GHI measurement, I get abnormal values of transposed irradiance for vertical modules facing East (it seems correct for West, or maybe even underestimated): irradiances over 3000 W/m² !

image.png.c85c5246b8c74c53279306636aec2040.png

I use Hay model (but it is similar with Perez)

am I doing something wrong?

thanks

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