[ANN] pvlib v0.13.1

[kevina...@gmail.com]

Dear pvlib community,

The maintainers are pleased to announce the v0.13.1 release of pvlib python.  This release is the product of contributions from 17 community members!

v0.13.1 Highlights:
* New pvlib.iotools functions for the Meteonorm and NASA POWER datasets
* Option to use the latest efficiency coefficients in the Huld PV model
* Improvements to the documentation, including a new page on spectral effects

Full details are available in the documentation: https://pvlib-python.readthedocs.io/en/stable/whatsnew.html

Releases are available from PyPI and the conda-forge channel:
* https://pypi.org/project/pvlib/
* https://anaconda.org/conda-forge/pvlib

Report issues & contribute:
* https://github.com/pvlib/pvlib-python

Thank you for using pvlib python!

[James Barry]

Thanks for the update. About the spectral effects - I had a question about the First Solar model. Does the spectral mismatch factor apply to GHI or tilted irradiance? I guess in the original paper it was calculated for tilted irradiance, right?

[cwh...@sandia.gov]

It could be applied to either, if you think of GHI as POA at a tilt of 0.

Mismatch factor models are usually developed by comparing measured POA broadband irradiance to measured module current. The First Solar model was validated with data from PV arrays. I don't have a copy of the paper handy, but I think it safe to assume the equation was fit to similar data.

Cliff