diff --git a/homeassistant/components/fritzbox/sensor.py b/homeassistant/components/fritzbox/sensor.py
index 56e025cd605..09a652d64ad 100644
--- a/homeassistant/components/fritzbox/sensor.py
+++ b/homeassistant/components/fritzbox/sensor.py
@@ -1,13 +1,12 @@
 """Support for AVM FRITZ!SmartHome temperature sensor only devices."""
 from __future__ import annotations
 
-from datetime import datetime
-
 from pyfritzhome import FritzhomeDevice
 
 from homeassistant.components.sensor import (
     ATTR_STATE_CLASS,
     STATE_CLASS_MEASUREMENT,
+    STATE_CLASS_TOTAL_INCREASING,
     SensorEntity,
 )
 from homeassistant.config_entries import ConfigEntry
@@ -28,7 +27,6 @@ from homeassistant.const import (
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
-from homeassistant.util.dt import utc_from_timestamp
 
 from . import FritzBoxEntity
 from .const import (
@@ -99,7 +97,7 @@ async def async_setup_entry(
                         ATTR_ENTITY_ID: f"{device.ain}_total_energy",
                         ATTR_UNIT_OF_MEASUREMENT: ENERGY_KILO_WATT_HOUR,
                         ATTR_DEVICE_CLASS: DEVICE_CLASS_ENERGY,
-                        ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+                        ATTR_STATE_CLASS: STATE_CLASS_TOTAL_INCREASING,
                     },
                     coordinator,
                     ain,
@@ -153,12 +151,6 @@ class FritzBoxEnergySensor(FritzBoxSensor):
             return energy / 1000  # type: ignore [no-any-return]
         return 0.0
 
-    @property
-    def last_reset(self) -> datetime:
-        """Return the time when the sensor was last reset, if any."""
-        # device does not provide timestamp of initialization
-        return utc_from_timestamp(0)
-
 
 class FritzBoxTempSensor(FritzBoxSensor):
     """The entity class for FRITZ!SmartHome temperature sensors."""
diff --git a/tests/components/fritzbox/test_switch.py b/tests/components/fritzbox/test_switch.py
index 951528f1e7d..27461b2790f 100644
--- a/tests/components/fritzbox/test_switch.py
+++ b/tests/components/fritzbox/test_switch.py
@@ -10,10 +10,10 @@ from homeassistant.components.fritzbox.const import (
     DOMAIN as FB_DOMAIN,
 )
 from homeassistant.components.sensor import (
-    ATTR_LAST_RESET,
     ATTR_STATE_CLASS,
     DOMAIN as SENSOR_DOMAIN,
     STATE_CLASS_MEASUREMENT,
+    STATE_CLASS_TOTAL_INCREASING,
 )
 from homeassistant.components.switch import DOMAIN
 from homeassistant.const import (
@@ -73,10 +73,9 @@ async def test_setup(hass: HomeAssistant, fritz: Mock):
     state = hass.states.get(f"{SENSOR_DOMAIN}.{CONF_FAKE_NAME}_total_energy")
     assert state
     assert state.state == "1.234"
-    assert state.attributes[ATTR_LAST_RESET] == "1970-01-01T00:00:00+00:00"
     assert state.attributes[ATTR_FRIENDLY_NAME] == f"{CONF_FAKE_NAME} Total Energy"
     assert state.attributes[ATTR_UNIT_OF_MEASUREMENT] == ENERGY_KILO_WATT_HOUR
-    assert state.attributes[ATTR_STATE_CLASS] == STATE_CLASS_MEASUREMENT
+    assert state.attributes[ATTR_STATE_CLASS] == STATE_CLASS_TOTAL_INCREASING
 
 
 async def test_turn_on(hass: HomeAssistant, fritz: Mock):