diff --git a/homeassistant/components/electric_kiwi/sensor.py b/homeassistant/components/electric_kiwi/sensor.py
index 83431dfd925..5f0351fd39b 100644
--- a/homeassistant/components/electric_kiwi/sensor.py
+++ b/homeassistant/components/electric_kiwi/sensor.py
@@ -34,20 +34,13 @@ ATTR_NEXT_BILLING_DATE = "next_billing_date"
 ATTR_HOP_PERCENTAGE = "hop_percentage"
 
 
-@dataclass(frozen=True)
-class ElectricKiwiAccountRequiredKeysMixin:
-    """Mixin for required keys."""
+@dataclass(frozen=True, kw_only=True)
+class ElectricKiwiAccountSensorEntityDescription(SensorEntityDescription):
+    """Describes Electric Kiwi sensor entity."""
 
     value_func: Callable[[AccountBalance], float | datetime]
 
 
-@dataclass(frozen=True)
-class ElectricKiwiAccountSensorEntityDescription(
-    SensorEntityDescription, ElectricKiwiAccountRequiredKeysMixin
-):
-    """Describes Electric Kiwi sensor entity."""
-
-
 ACCOUNT_SENSOR_TYPES: tuple[ElectricKiwiAccountSensorEntityDescription, ...] = (
     ElectricKiwiAccountSensorEntityDescription(
         key=ATTR_TOTAL_RUNNING_BALANCE,
@@ -85,21 +78,13 @@ ACCOUNT_SENSOR_TYPES: tuple[ElectricKiwiAccountSensorEntityDescription, ...] = (
 )
 
 
-@dataclass(frozen=True)
-class ElectricKiwiHOPRequiredKeysMixin:
-    """Mixin for required HOP keys."""
+@dataclass(frozen=True, kw_only=True)
+class ElectricKiwiHOPSensorEntityDescription(SensorEntityDescription):
+    """Describes Electric Kiwi HOP sensor entity."""
 
     value_func: Callable[[Hop], datetime]
 
 
-@dataclass(frozen=True)
-class ElectricKiwiHOPSensorEntityDescription(
-    SensorEntityDescription,
-    ElectricKiwiHOPRequiredKeysMixin,
-):
-    """Describes Electric Kiwi HOP sensor entity."""
-
-
 def _check_and_move_time(hop: Hop, time: str) -> datetime:
     """Return the time a day forward if HOP end_time is in the past."""
     date_time = datetime.combine(