- Add :py:func:`~pvlib.ivtools.sdm.fit_desoto_batzelis`, a function to estimate parameters for the De Soto single-diode model from datasheet values. (:pull:`2563`)
- Add :py:func:`~pvlib.ivtools.singlediode.batzelis_keypoints`, a function to estimate maximum power, open circuit, and short circuit points using parameters for the single-diode equation. (:pull:`2563`)
- Add :py:func:`~pvlib.pvarray.batzelis`, a function to estimate maximum power open circuit, and short circuit points from datasheet values. (:pull:`2563`)