pvlib.irradiance.poa_horizontal_ratio¶
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pvlib.irradiance.
poa_horizontal_ratio
(surface_tilt, surface_azimuth, solar_zenith, solar_azimuth)[source]¶ Calculates the ratio of the beam components of the plane of array irradiance and the horizontal irradiance.
Input all angles in degrees.
- Parameters
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.
- Returns
ratio (numeric) – Ratio of the plane of array irradiance to the horizontal plane irradiance