undo bad pull

Author: cwhanse

docs/sphinx/source/whatsnew/v0.13.2.rst

@@ -27,7 +27,8 @@ Enhancements
   :py:func:`~pvlib.singlediode.bishop88_mpp`,
   :py:func:`~pvlib.singlediode.bishop88_v_from_i`, and
   :py:func:`~pvlib.singlediode.bishop88_i_from_v`. (:issue:`2497`, :pull:`2498`)
-* Accelerate :py:func:`~pvlib.pvsystem.singlediode` when scipy>=1.15 is installed. (:issue:`2497`, :pull:`2567`)
+* Accelerate :py:func:`~pvlib.pvsystem.singlediode` when scipy>=1.15 is
+  installed. (:issue:`2497`, :pull:`2567`)
 
 
 Documentation

pvlib/singlediode.py

@@ -930,9 +930,7 @@ def _lambertw(photocurrent, saturation_current, resistance_series,
         # switch to old golden section method
         p_mp, v_mp = _golden_sect_DataFrame(params, 0., v_oc * 1.14,
                                             _pwr_optfcn)
-
-    # Find Imp using Lambert W
-    i_mp = _lambertw_i_from_v(v_mp, **params)
+    i_mp = p_mp / v_mp
 
     # Find Ix and Ixx using Lambert W
     i_x = _lambertw_i_from_v(0.5 * v_oc, **params)