diff --git a/docs/sphinx/source/whatsnew/v0.16.2.rst b/docs/sphinx/source/whatsnew/v0.16.2.rst
index 67e908862a..5893d8bf46 100644
--- a/docs/sphinx/source/whatsnew/v0.16.2.rst
+++ b/docs/sphinx/source/whatsnew/v0.16.2.rst
@@ -31,6 +31,8 @@ Enhancements
 
 Documentation
 ~~~~~~~~~~~~~
+* Fix :py:func:`pvlib.bifacial.power_mismatch_deline` incorrect derivation
+  of total RMAD from rear RMAD. (:issue:`2929`, :pull:`2930`)
 * Add :py:func:`pvlib.spa.transit_sunrise_sunset` to the API reference.
   (:issue:`2255`, :pull:`2873`)
 * Clarified in :py:func:`pvlib.tracking.singleaxis` that the tracker
diff --git a/pvlib/bifacial/loss_models.py b/pvlib/bifacial/loss_models.py
index 4c6f0febf3..9bc7659bfa 100644
--- a/pvlib/bifacial/loss_models.py
+++ b/pvlib/bifacial/loss_models.py
@@ -115,8 +115,8 @@ def power_mismatch_deline(
 
     .. math::
 
-       RMAD(k \cdot X + c) = RMAD(X) \cdot k \frac{k \bar{X}}{k \bar{X} + c}
-       = RMAD(X) \cdot \frac{k}{1 + \frac{c}{k \bar{X}}}
+       RMAD(k \cdot X + c) = RMAD(X) \frac{k \bar{X}}{k \bar{X} + c}
+       = RMAD(X) \cdot \frac{1}{1 + \frac{c}{k \bar{X}}}
 
     by similarity with equation (2) of [1]_:
 
@@ -128,7 +128,7 @@ def power_mismatch_deline(
 
     .. math::
 
-       RMAD_{total} = RMAD_{rear} \frac{\phi_{Bifi}}
+       RMAD_{total} = RMAD_{rear} \frac{1}
        {1 + \frac{G_{front}}{\phi_{Bifi} \bar{G}_{rear}}}
 
     See Also