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