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Difference in Clearsky DNI Results Between PVLib and Solcast #2297

Answered by AdamRJensen
HrvojeR asked this question in Q&A
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Solcast is based on actual current aerosol data, whereas the pvlib function you use is based on climatological average aerosol data (high uncertainty).

I would recommend comparing against the free McClear clear sky data (this can be retrieved using the pvlib.iotools.get_cams function).

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@wholmgren
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