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Ground reflection on front side


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Hi PVsyst experts,

I am trying to find the factors that impact on the ground reflection on front side which appears in loss diagram in Bi-facial module simulations.

Other than geometry parameters such as tilt, pitch, coll band width etc. I assume albedo that is defined in both project settings and system definition should bring some impact as well to this gain. However, by playing with the albedos in the simulation, I realized the higher the albedo, the smaller this gain is. It is quite surprising as I imagined the more reflected light, the more energy should be produced for the front side cells.

Could someone help me understand why the result is opposite?


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