diff --git a/homeassistant/components/tesla_wall_connector/sensor.py b/homeassistant/components/tesla_wall_connector/sensor.py
index 09933d628fe..67d3d4ba22e 100644
--- a/homeassistant/components/tesla_wall_connector/sensor.py
+++ b/homeassistant/components/tesla_wall_connector/sensor.py
@@ -153,7 +153,9 @@ WALL_CONNECTOR_SENSORS = [
         key="session_energy_wh",
         translation_key="session_energy_wh",
         native_unit_of_measurement=UnitOfEnergy.WATT_HOUR,
+        suggested_unit_of_measurement=UnitOfEnergy.KILO_WATT_HOUR,
         value_fn=lambda data: data[WALLCONNECTOR_DATA_VITALS].session_energy_wh,
+        device_class=SensorDeviceClass.ENERGY,
         state_class=SensorStateClass.MEASUREMENT,
     ),
     WallConnectorSensorDescription(
diff --git a/tests/components/tesla_wall_connector/test_sensor.py b/tests/components/tesla_wall_connector/test_sensor.py
index 684d7de0e82..28b50ba72ea 100644
--- a/tests/components/tesla_wall_connector/test_sensor.py
+++ b/tests/components/tesla_wall_connector/test_sensor.py
@@ -47,7 +47,7 @@ async def test_sensors(hass: HomeAssistant) -> None:
             "sensor.tesla_wall_connector_phase_c_voltage", "232.1", "230"
         ),
         EntityAndExpectedValues(
-            "sensor.tesla_wall_connector_session_energy", "1234.56", "112.2"
+            "sensor.tesla_wall_connector_session_energy", "1.23456", "0.1122"
         ),
     ]