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Incorrect shading frequency


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While designing a PV system over a 3D OBJ (captured in drone deploy and exported on ReCap) the result of the simulation was 15000kwh/year. It is a system surrounded by 2 buildings, with lots of shading.

After the system was installed, the efficiency was aroung 30% of the simulated values. Reviewing the 3D simulation, I noticed that the shading simulation was incorrect, with values around 3% where it should be higher.

So, I designed walls to simulate the building walls, and turns out that the simulation result became very close to the actual generation. Se attached pictures with and without the walls.

It seems like PvSol cogeneratedBy_react-csv (2).csvnsidered the actual 3D model as "transparent" or something like that. What is the reason and correction for this behaviour?


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