pvlib.pvsystem.sapm_aoi_loss¶
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pvlib.pvsystem.
sapm_aoi_loss
(aoi, module, upper=None)[source]¶ Calculates the SAPM angle of incidence loss coefficient, F2.
Parameters: - aoi : numeric
Angle of incidence in degrees. Negative input angles will return zeros.
- module : dict-like
A dict, Series, or DataFrame defining the SAPM performance parameters. See the
sapm()
notes section for more details.- upper : None or float, default None
Upper limit on the results.
Returns: - F2 : numeric
The SAPM angle of incidence loss coefficient.
Notes
The SAPM traditionally does not define an upper limit on the AOI loss function and values slightly exceeding 1 may exist for moderate angles of incidence (15-40 degrees). However, users may consider imposing an upper limit of 1.
References
[1] King, D. et al, 2004, “Sandia Photovoltaic Array Performance Model”, SAND Report 3535, Sandia National Laboratories, Albuquerque, NM.
[2] B.H. King et al, “Procedure to Determine Coefficients for the Sandia Array Performance Model (SAPM),” SAND2016-5284, Sandia National Laboratories (2016).
[3] B.H. King et al, “Recent Advancements in Outdoor Measurement Techniques for Angle of Incidence Effects,” 42nd IEEE PVSC (2015). DOI: 10.1109/PVSC.2015.7355849