diff --git a/homeassistant/components/matter/sensor.py b/homeassistant/components/matter/sensor.py
index c3ab18072f089..5d4ad900d8ece 100644
--- a/homeassistant/components/matter/sensor.py
+++ b/homeassistant/components/matter/sensor.py
@@ -384,7 +384,7 @@ def _update_from_device(self) -> None:
             key="ThirdRealityEnergySensorWattAccumulated",
             device_class=SensorDeviceClass.ENERGY,
             entity_category=EntityCategory.DIAGNOSTIC,
-            native_unit_of_measurement=UnitOfEnergy.KILO_WATT_HOUR,
+            native_unit_of_measurement=UnitOfEnergy.WATT_HOUR,
             suggested_display_precision=3,
             state_class=SensorStateClass.TOTAL_INCREASING,
             measurement_to_ha=lambda x: x / 1000,