pvlib.irradiance.poa_components

pvlib.irradiance.poa_components(aoi, dni, poa_sky_diffuse, poa_ground_diffuse)[source]

Determine the three components on in-plane irradiance

Combines in-plane irradaince compoents from the chosen diffuse translation, ground reflection and beam irradiance algorithms into the total in-plane irradiance.

Parameters:
aoi : numeric

Angle of incidence of solar rays with respect to the module surface, from aoi().

dni : numeric

Direct normal irradiance (W/m^2), as measured from a TMY file or calculated with a clearsky model.

poa_sky_diffuse : numeric

Diffuse irradiance (W/m^2) in the plane of the modules, as calculated by a diffuse irradiance translation function

poa_ground_diffuse : numeric

Ground reflected irradiance (W/m^2) in the plane of the modules, as calculated by an albedo model (eg. grounddiffuse())
Returns:
irrads : OrderedDict or DataFrame

Contains the following keys:

  • poa_global : Total in-plane irradiance (W/m^2)
  • poa_direct : Total in-plane beam irradiance (W/m^2)
  • poa_diffuse : Total in-plane diffuse irradiance (W/m^2)
  • poa_sky_diffuse : In-plane diffuse irradiance from sky (W/m^2)
  • poa_ground_diffuse : In-plane diffuse irradiance from ground (W/m^2)

Notes

Negative beam irradiation due to aoi \(> 90^{\circ}\) or AOI \(< 0^{\circ}\) is set to zero.