diff --git a/homeassistant/components/sma/sensor.py b/homeassistant/components/sma/sensor.py
index 36084c53bb3..8808272ad75 100644
--- a/homeassistant/components/sma/sensor.py
+++ b/homeassistant/components/sma/sensor.py
@@ -9,7 +9,7 @@ import voluptuous as vol
 
 from homeassistant.components.sensor import (
     PLATFORM_SCHEMA,
-    STATE_CLASS_MEASUREMENT,
+    STATE_CLASS_TOTAL_INCREASING,
     SensorEntity,
 )
 from homeassistant.config_entries import SOURCE_IMPORT, ConfigEntry
@@ -32,7 +32,6 @@ from homeassistant.helpers.update_coordinator import (
     CoordinatorEntity,
     DataUpdateCoordinator,
 )
-from homeassistant.util import dt as dt_util
 
 from .const import (
     CONF_CUSTOM,
@@ -165,9 +164,8 @@ class SMAsensor(CoordinatorEntity, SensorEntity):
         self._device_info = device_info
 
         if self.unit_of_measurement == ENERGY_KILO_WATT_HOUR:
-            self._attr_state_class = STATE_CLASS_MEASUREMENT
+            self._attr_state_class = STATE_CLASS_TOTAL_INCREASING
             self._attr_device_class = DEVICE_CLASS_ENERGY
-            self._attr_last_reset = dt_util.utc_from_timestamp(0)
 
         # Set sensor enabled to False.
         # Will be enabled by async_added_to_hass if actually used.