diff --git a/custom_components/fusion_solar/fusion_solar/realtime_device_data_sensor.py b/custom_components/fusion_solar/fusion_solar/realtime_device_data_sensor.py
index cf41250..f116fe0 100644
--- a/custom_components/fusion_solar/fusion_solar/realtime_device_data_sensor.py
+++ b/custom_components/fusion_solar/fusion_solar/realtime_device_data_sensor.py
@@ -170,6 +170,12 @@ def unit_of_measurement(self) -> str:
     @property
     def state_class(self) -> str:
         return STATE_CLASS_MEASUREMENT
+
+    @property
+    def last_reset(self) -> None:
+        return None
+
+
 class FusionSolarRealtimeDeviceDataEnergyTotalIncreasingSensor(FusionSolarRealtimeDeviceDataEnergySensor):
     @property
     def state_class(self) -> str: