Calculates the beam component of the plane of array irradiance.
surface_tilt (numeric) – Panel tilt from horizontal.
surface_azimuth (numeric) – Panel azimuth from north.
solar_zenith (numeric) – Solar zenith angle.
solar_azimuth (numeric) – Solar azimuth angle.
dni (numeric) – Direct Normal Irradiance
beam (numeric) – Beam component
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