maximum recursion depth with perez_diffuse_luminance #146
Description
When calling perez_diffuse_luminance irradiance model with a panel configuration where the solar vector is almost orthogonal to the surface normal, the computation falls into an infinite recursion loop.
from pvfactors.irradiance.models import perez_diffuse_luminance
timestamps = ['2020-01-02 15:00:00+00:00']
surface_tilt=[86.43564127244697]
surface_azimuth=[312.7]
solar_zenith=[78.53023197697105]
solar_azimuth=[221.9758276910072]
DNI=[100]
DHI=[50]
perez_diffuse_luminance(
timestamps, surface_tilt, surface_azimuth, solar_zenith,
solar_azimuth, DNI, DHI)RecursionError: maximum recursion depth exceeded while calling a Python objectThis is probably because the dot product of the solar vector and both surface normal (front and back) is computed as negative by pvlib.
from pvlib import irradiance
surface_tilt = 86.43564127244697
surface_azimuth = 312.7
solar_azimuth = 221.9758276910072
solar_zenith = 78.53023197697105
irradiance.aoi_projection(surface_tilt, surface_azimuth, solar_zenith, solar_azimuth)
-3.642919299551295e-17
irradiance.aoi_projection(180-surface_tilt, surface_azimuth-180, solar_zenith, solar_azimuth)
-3.642919299551295e-17