diff --git a/homeassistant/components/kostal_plenticore/const.py b/homeassistant/components/kostal_plenticore/const.py
index 5c223f4f5d6..ede8e10cb25 100644
--- a/homeassistant/components/kostal_plenticore/const.py
+++ b/homeassistant/components/kostal_plenticore/const.py
@@ -1,5 +1,10 @@
 """Constants for the Kostal Plenticore Solar Inverter integration."""
 
+from homeassistant.components.sensor import (
+    ATTR_LAST_RESET,
+    ATTR_STATE_CLASS,
+    STATE_CLASS_MEASUREMENT,
+)
 from homeassistant.const import (
     ATTR_DEVICE_CLASS,
     ATTR_ICON,
@@ -11,11 +16,14 @@ from homeassistant.const import (
     PERCENTAGE,
     POWER_WATT,
 )
+from homeassistant.util.dt import utc_from_timestamp
 
 DOMAIN = "kostal_plenticore"
 
 ATTR_ENABLED_DEFAULT = "entity_registry_enabled_default"
 
+LAST_RESET_NEVER = utc_from_timestamp(0)
+
 # Defines all entities for process data.
 #
 # Each entry is defined with a tuple of these values:
@@ -40,6 +48,7 @@ SENSOR_PROCESS_DATA = [
             ATTR_UNIT_OF_MEASUREMENT: POWER_WATT,
             ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER,
             ATTR_ENABLED_DEFAULT: True,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
         },
         "format_round",
     ),
@@ -51,6 +60,7 @@ SENSOR_PROCESS_DATA = [
             ATTR_UNIT_OF_MEASUREMENT: POWER_WATT,
             ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER,
             ATTR_ENABLED_DEFAULT: True,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
         },
         "format_round",
     ),
@@ -65,28 +75,44 @@ SENSOR_PROCESS_DATA = [
         "devices:local",
         "HomeGrid_P",
         "Home Power from Grid",
-        {ATTR_UNIT_OF_MEASUREMENT: POWER_WATT, ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER},
+        {
+            ATTR_UNIT_OF_MEASUREMENT: POWER_WATT,
+            ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+        },
         "format_round",
     ),
     (
         "devices:local",
         "HomeOwn_P",
         "Home Power from Own",
-        {ATTR_UNIT_OF_MEASUREMENT: POWER_WATT, ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER},
+        {
+            ATTR_UNIT_OF_MEASUREMENT: POWER_WATT,
+            ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+        },
         "format_round",
     ),
     (
         "devices:local",
         "HomePv_P",
         "Home Power from PV",
-        {ATTR_UNIT_OF_MEASUREMENT: POWER_WATT, ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER},
+        {
+            ATTR_UNIT_OF_MEASUREMENT: POWER_WATT,
+            ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+        },
         "format_round",
     ),
     (
         "devices:local",
         "Home_P",
         "Home Power",
-        {ATTR_UNIT_OF_MEASUREMENT: POWER_WATT, ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER},
+        {
+            ATTR_UNIT_OF_MEASUREMENT: POWER_WATT,
+            ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+        },
         "format_round",
     ),
     (
@@ -97,6 +123,7 @@ SENSOR_PROCESS_DATA = [
             ATTR_UNIT_OF_MEASUREMENT: POWER_WATT,
             ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER,
             ATTR_ENABLED_DEFAULT: True,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
         },
         "format_round",
     ),
@@ -104,28 +131,44 @@ SENSOR_PROCESS_DATA = [
         "devices:local:pv1",
         "P",
         "DC1 Power",
-        {ATTR_UNIT_OF_MEASUREMENT: POWER_WATT, ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER},
+        {
+            ATTR_UNIT_OF_MEASUREMENT: POWER_WATT,
+            ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+        },
         "format_round",
     ),
     (
         "devices:local:pv2",
         "P",
         "DC2 Power",
-        {ATTR_UNIT_OF_MEASUREMENT: POWER_WATT, ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER},
+        {
+            ATTR_UNIT_OF_MEASUREMENT: POWER_WATT,
+            ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+        },
         "format_round",
     ),
     (
         "devices:local:pv3",
         "P",
         "DC3 Power",
-        {ATTR_UNIT_OF_MEASUREMENT: POWER_WATT, ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER},
+        {
+            ATTR_UNIT_OF_MEASUREMENT: POWER_WATT,
+            ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+        },
         "format_round",
     ),
     (
         "devices:local",
         "PV2Bat_P",
         "PV to Battery Power",
-        {ATTR_UNIT_OF_MEASUREMENT: POWER_WATT, ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER},
+        {
+            ATTR_UNIT_OF_MEASUREMENT: POWER_WATT,
+            ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+        },
         "format_round",
     ),
     (
@@ -139,14 +182,18 @@ SENSOR_PROCESS_DATA = [
         "devices:local:battery",
         "Cycles",
         "Battery Cycles",
-        {ATTR_ICON: "mdi:recycle"},
+        {ATTR_ICON: "mdi:recycle", ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT},
         "format_round",
     ),
     (
         "devices:local:battery",
         "P",
         "Battery Power",
-        {ATTR_UNIT_OF_MEASUREMENT: POWER_WATT, ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER},
+        {
+            ATTR_UNIT_OF_MEASUREMENT: POWER_WATT,
+            ATTR_DEVICE_CLASS: DEVICE_CLASS_POWER,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+        },
         "format_round",
     ),
     (
@@ -174,7 +221,11 @@ SENSOR_PROCESS_DATA = [
         "scb:statistic:EnergyFlow",
         "Statistic:Autarky:Total",
         "Autarky Total",
-        {ATTR_UNIT_OF_MEASUREMENT: PERCENTAGE, ATTR_ICON: "mdi:chart-donut"},
+        {
+            ATTR_UNIT_OF_MEASUREMENT: PERCENTAGE,
+            ATTR_ICON: "mdi:chart-donut",
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+        },
         "format_round",
     ),
     (
@@ -202,7 +253,11 @@ SENSOR_PROCESS_DATA = [
         "scb:statistic:EnergyFlow",
         "Statistic:OwnConsumptionRate:Total",
         "Own Consumption Rate Total",
-        {ATTR_UNIT_OF_MEASUREMENT: PERCENTAGE, ATTR_ICON: "mdi:chart-donut"},
+        {
+            ATTR_UNIT_OF_MEASUREMENT: PERCENTAGE,
+            ATTR_ICON: "mdi:chart-donut",
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+        },
         "format_round",
     ),
     (
@@ -249,6 +304,8 @@ SENSOR_PROCESS_DATA = [
         {
             ATTR_UNIT_OF_MEASUREMENT: ENERGY_KILO_WATT_HOUR,
             ATTR_DEVICE_CLASS: DEVICE_CLASS_ENERGY,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+            ATTR_LAST_RESET: LAST_RESET_NEVER,
         },
         "format_energy",
     ),
@@ -289,6 +346,8 @@ SENSOR_PROCESS_DATA = [
         {
             ATTR_UNIT_OF_MEASUREMENT: ENERGY_KILO_WATT_HOUR,
             ATTR_DEVICE_CLASS: DEVICE_CLASS_ENERGY,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+            ATTR_LAST_RESET: LAST_RESET_NEVER,
         },
         "format_energy",
     ),
@@ -329,6 +388,8 @@ SENSOR_PROCESS_DATA = [
         {
             ATTR_UNIT_OF_MEASUREMENT: ENERGY_KILO_WATT_HOUR,
             ATTR_DEVICE_CLASS: DEVICE_CLASS_ENERGY,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+            ATTR_LAST_RESET: LAST_RESET_NEVER,
         },
         "format_energy",
     ),
@@ -369,6 +430,8 @@ SENSOR_PROCESS_DATA = [
         {
             ATTR_UNIT_OF_MEASUREMENT: ENERGY_KILO_WATT_HOUR,
             ATTR_DEVICE_CLASS: DEVICE_CLASS_ENERGY,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+            ATTR_LAST_RESET: LAST_RESET_NEVER,
         },
         "format_energy",
     ),
@@ -409,6 +472,8 @@ SENSOR_PROCESS_DATA = [
         {
             ATTR_UNIT_OF_MEASUREMENT: ENERGY_KILO_WATT_HOUR,
             ATTR_DEVICE_CLASS: DEVICE_CLASS_ENERGY,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+            ATTR_LAST_RESET: LAST_RESET_NEVER,
         },
         "format_energy",
     ),
@@ -449,6 +514,8 @@ SENSOR_PROCESS_DATA = [
         {
             ATTR_UNIT_OF_MEASUREMENT: ENERGY_KILO_WATT_HOUR,
             ATTR_DEVICE_CLASS: DEVICE_CLASS_ENERGY,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+            ATTR_LAST_RESET: LAST_RESET_NEVER,
         },
         "format_energy",
     ),
@@ -489,6 +556,8 @@ SENSOR_PROCESS_DATA = [
         {
             ATTR_UNIT_OF_MEASUREMENT: ENERGY_KILO_WATT_HOUR,
             ATTR_DEVICE_CLASS: DEVICE_CLASS_ENERGY,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+            ATTR_LAST_RESET: LAST_RESET_NEVER,
         },
         "format_energy",
     ),
@@ -530,6 +599,8 @@ SENSOR_PROCESS_DATA = [
         {
             ATTR_UNIT_OF_MEASUREMENT: ENERGY_KILO_WATT_HOUR,
             ATTR_DEVICE_CLASS: DEVICE_CLASS_ENERGY,
+            ATTR_STATE_CLASS: STATE_CLASS_MEASUREMENT,
+            ATTR_LAST_RESET: LAST_RESET_NEVER,
         },
         "format_energy",
     ),
diff --git a/homeassistant/components/kostal_plenticore/sensor.py b/homeassistant/components/kostal_plenticore/sensor.py
index 717dfacbfdf..099d359e619 100644
--- a/homeassistant/components/kostal_plenticore/sensor.py
+++ b/homeassistant/components/kostal_plenticore/sensor.py
@@ -1,11 +1,15 @@
 """Platform for Kostal Plenticore sensors."""
 from __future__ import annotations
 
-from datetime import timedelta
+from datetime import datetime, timedelta
 import logging
 from typing import Any, Callable
 
-from homeassistant.components.sensor import SensorEntity
+from homeassistant.components.sensor import (
+    ATTR_LAST_RESET,
+    ATTR_STATE_CLASS,
+    SensorEntity,
+)
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import ATTR_DEVICE_CLASS, ATTR_ICON, ATTR_UNIT_OF_MEASUREMENT
 from homeassistant.core import HomeAssistant
@@ -179,11 +183,21 @@ class PlenticoreDataSensor(CoordinatorEntity, SensorEntity):
         """Return the class of this device, from component DEVICE_CLASSES."""
         return self._sensor_data.get(ATTR_DEVICE_CLASS)
 
+    @property
+    def state_class(self) -> str | None:
+        """Return the class of the state of this device, from component STATE_CLASSES."""
+        return self._sensor_data.get(ATTR_STATE_CLASS)
+
     @property
     def entity_registry_enabled_default(self) -> bool:
         """Return if the entity should be enabled when first added to the entity registry."""
         return self._sensor_data.get(ATTR_ENABLED_DEFAULT, False)
 
+    @property
+    def last_reset(self) -> datetime | None:
+        """Return the last_reset time."""
+        return self._sensor_data.get(ATTR_LAST_RESET)
+
     @property
     def state(self) -> Any | None:
         """Return the state of the sensor."""