diff --git a/homeassistant/components/dsmr/sensor.py b/homeassistant/components/dsmr/sensor.py
index 918d4e33971..03e89b971fc 100644
--- a/homeassistant/components/dsmr/sensor.py
+++ b/homeassistant/components/dsmr/sensor.py
@@ -241,6 +241,7 @@ SENSORS: tuple[DSMRSensorEntityDescription, ...] = (
         obis_reference="SHORT_POWER_FAILURE_COUNT",
         dsmr_versions={"2.2", "4", "5", "5L"},
         entity_registry_enabled_default=False,
+        state_class=SensorStateClass.TOTAL_INCREASING,
         entity_category=EntityCategory.DIAGNOSTIC,
     ),
     DSMRSensorEntityDescription(
@@ -249,6 +250,7 @@ SENSORS: tuple[DSMRSensorEntityDescription, ...] = (
         obis_reference="LONG_POWER_FAILURE_COUNT",
         dsmr_versions={"2.2", "4", "5", "5L"},
         entity_registry_enabled_default=False,
+        state_class=SensorStateClass.TOTAL_INCREASING,
         entity_category=EntityCategory.DIAGNOSTIC,
     ),
     DSMRSensorEntityDescription(
@@ -257,6 +259,7 @@ SENSORS: tuple[DSMRSensorEntityDescription, ...] = (
         obis_reference="VOLTAGE_SAG_L1_COUNT",
         dsmr_versions={"2.2", "4", "5", "5L"},
         entity_registry_enabled_default=False,
+        state_class=SensorStateClass.TOTAL_INCREASING,
         entity_category=EntityCategory.DIAGNOSTIC,
     ),
     DSMRSensorEntityDescription(
@@ -265,6 +268,7 @@ SENSORS: tuple[DSMRSensorEntityDescription, ...] = (
         obis_reference="VOLTAGE_SAG_L2_COUNT",
         dsmr_versions={"2.2", "4", "5", "5L"},
         entity_registry_enabled_default=False,
+        state_class=SensorStateClass.TOTAL_INCREASING,
         entity_category=EntityCategory.DIAGNOSTIC,
     ),
     DSMRSensorEntityDescription(
@@ -273,6 +277,7 @@ SENSORS: tuple[DSMRSensorEntityDescription, ...] = (
         obis_reference="VOLTAGE_SAG_L3_COUNT",
         dsmr_versions={"2.2", "4", "5", "5L"},
         entity_registry_enabled_default=False,
+        state_class=SensorStateClass.TOTAL_INCREASING,
         entity_category=EntityCategory.DIAGNOSTIC,
     ),
     DSMRSensorEntityDescription(
@@ -281,6 +286,7 @@ SENSORS: tuple[DSMRSensorEntityDescription, ...] = (
         obis_reference="VOLTAGE_SWELL_L1_COUNT",
         dsmr_versions={"2.2", "4", "5", "5L"},
         entity_registry_enabled_default=False,
+        state_class=SensorStateClass.TOTAL_INCREASING,
         entity_category=EntityCategory.DIAGNOSTIC,
     ),
     DSMRSensorEntityDescription(
@@ -289,6 +295,7 @@ SENSORS: tuple[DSMRSensorEntityDescription, ...] = (
         obis_reference="VOLTAGE_SWELL_L2_COUNT",
         dsmr_versions={"2.2", "4", "5", "5L"},
         entity_registry_enabled_default=False,
+        state_class=SensorStateClass.TOTAL_INCREASING,
         entity_category=EntityCategory.DIAGNOSTIC,
     ),
     DSMRSensorEntityDescription(
@@ -297,6 +304,7 @@ SENSORS: tuple[DSMRSensorEntityDescription, ...] = (
         obis_reference="VOLTAGE_SWELL_L3_COUNT",
         dsmr_versions={"2.2", "4", "5", "5L"},
         entity_registry_enabled_default=False,
+        state_class=SensorStateClass.TOTAL_INCREASING,
         entity_category=EntityCategory.DIAGNOSTIC,
     ),
     DSMRSensorEntityDescription(