diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 850beb8..6b276fa 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -8,6 +8,7 @@ explicitly configured.
 ## Upgrading
 
 * Update assets client to v0.3.0.
+* Default formulas for AC active power and energy are removed.
 
 ## New Features
 
diff --git a/src/frequenz/gridpool/_microgrid_config.py b/src/frequenz/gridpool/_microgrid_config.py
index 2afae01..836d380 100644
--- a/src/frequenz/gridpool/_microgrid_config.py
+++ b/src/frequenz/gridpool/_microgrid_config.py
@@ -51,19 +51,6 @@ def __post_init__(self) -> None:
                 "please use 'AC_POWER_ACTIVE' instead."
             )
 
-        defaults = {
-            "AC_POWER_ACTIVE",
-            "AC_ENERGY_ACTIVE",
-            "AC_ENERGY_ACTIVE_CONSUMED",
-            "AC_ENERGY_ACTIVE_DELIVERED",
-        }
-
-        for metric in defaults:
-            if metric not in self.formula:
-                self.formula[metric] = "+".join(
-                    [f"#{cid}" for cid in self._default_cids()]
-                )
-
     def cids(self, metric: str = "") -> list[int]:
         """Get component IDs for this component.