Different Global incident in coll. plane ratio for different climate sources but almost same GlobHor

[Solarian]

We simulated with NASA and MN for the same location. The global irradiation is almost same but the global incident in coll. plane ratio is very different. What is the reason? Please find ss of pvsyst results.

[Michele Oliosi]

Difficult to say with monthly data only. But the diffuse seems to be quite different, which could explain differences before and after transposition.

[Matcor Duarte]

 

Hello, how are you? I am having the same issue. I set up two projects in the same location with different configurations, using the same meteorological data, but I'm getting different incident irradiance on the plane.

[Michele Oliosi]

@Matcor Duarte this is a different issue. The original post had two different weather data sources.
In your case, changing the configuration probably also changed the tracking or orientation in some way? This would explain some differences in the GlobInc variable.

Take a look and compare the “general parameters” frame in the report.