pvlib.irradiance.poa_horizontal_ratio

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