pvlib.irradiance.get_total_irradiance

pvlib.irradiance.get_total_irradiance(surface_tilt, surface_azimuth, solar_zenith, solar_azimuth, dni, ghi, dhi, dni_extra=None, airmass=None, albedo=0.25, surface_type=None, model='isotropic', model_perez='allsitescomposite1990', **kwargs)

Determine total in-plane irradiance and its beam, sky diffuse and ground reflected components, using the specified sky diffuse irradiance model.

\[I_{tot} = I_{beam} + I_{sky diffuse} + I_{ground}\]

Sky diffuse models include:

• isotropic (default)
• klucher
• haydavies
• reindl
• king
• perez

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.

dni : numeric

Direct Normal Irradiance

ghi : numeric

Global horizontal irradiance

dhi : numeric

Diffuse horizontal irradiance

dni_extra : None or numeric, default None

Extraterrestrial direct normal irradiance

airmass : None or numeric, default None

Airmass

albedo : numeric, default 0.25

Surface albedo

surface_type : None or String, default None

Surface type. See grounddiffuse.

model : String, default ‘isotropic’

Irradiance model.

model_perez : String, default ‘allsitescomposite1990’

Used only if model=’perez’. See perez().

Returns:

total_irrad : OrderedDict or DataFrame

Contains keys/columns 'poa_global', 'poa_direct', 'poa_diffuse', 'poa_sky_diffuse', 'poa_ground_diffuse'.