diff --git a/homeassistant/components/kostal_plenticore/select.py b/homeassistant/components/kostal_plenticore/select.py
index 4e594095f7e..1844f0894a5 100644
--- a/homeassistant/components/kostal_plenticore/select.py
+++ b/homeassistant/components/kostal_plenticore/select.py
@@ -9,7 +9,7 @@ from homeassistant.components.select import SelectEntity
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import DEVICE_DEFAULT_NAME
 from homeassistant.core import HomeAssistant
-from homeassistant.helpers.entity import DeviceInfo
+from homeassistant.helpers.entity import DeviceInfo, EntityCategory
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
@@ -54,6 +54,8 @@ async def async_setup_entry(
 class PlenticoreDataSelect(CoordinatorEntity, SelectEntity, ABC):
     """Representation of a Plenticore Select."""
 
+    _attr_entity_category = EntityCategory.CONFIG
+
     def __init__(
         self,
         coordinator,
diff --git a/homeassistant/components/kostal_plenticore/sensor.py b/homeassistant/components/kostal_plenticore/sensor.py
index 15971cec68d..bef47e7c605 100644
--- a/homeassistant/components/kostal_plenticore/sensor.py
+++ b/homeassistant/components/kostal_plenticore/sensor.py
@@ -10,7 +10,7 @@ from homeassistant.components.sensor import 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
-from homeassistant.helpers.entity import DeviceInfo
+from homeassistant.helpers.entity import DeviceInfo, EntityCategory
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
 from .const import (
@@ -65,6 +65,7 @@ async def async_setup_entry(
                 sensor_data,
                 PlenticoreDataFormatter.get_method(fmt),
                 plenticore.device_info,
+                None,
             )
         )
 
@@ -96,6 +97,7 @@ async def async_setup_entry(
                 sensor_data,
                 PlenticoreDataFormatter.get_method(fmt),
                 plenticore.device_info,
+                EntityCategory.DIAGNOSTIC,
             )
         )
 
@@ -116,6 +118,7 @@ class PlenticoreDataSensor(CoordinatorEntity, SensorEntity):
         sensor_data: dict[str, Any],
         formatter: Callable[[str], Any],
         device_info: DeviceInfo,
+        entity_category: EntityCategory,
     ):
         """Create a new Sensor Entity for Plenticore process data."""
         super().__init__(coordinator)
@@ -130,6 +133,8 @@ class PlenticoreDataSensor(CoordinatorEntity, SensorEntity):
 
         self._device_info = device_info
 
+        self._attr_entity_category = entity_category
+
     @property
     def available(self) -> bool:
         """Return if entity is available."""
diff --git a/homeassistant/components/kostal_plenticore/switch.py b/homeassistant/components/kostal_plenticore/switch.py
index b3b1ba29e84..ea1f78283f3 100644
--- a/homeassistant/components/kostal_plenticore/switch.py
+++ b/homeassistant/components/kostal_plenticore/switch.py
@@ -8,7 +8,7 @@ import logging
 from homeassistant.components.switch import SwitchEntity
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.core import HomeAssistant
-from homeassistant.helpers.entity import DeviceInfo
+from homeassistant.helpers.entity import DeviceInfo, EntityCategory
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
@@ -70,6 +70,8 @@ async def async_setup_entry(
 class PlenticoreDataSwitch(CoordinatorEntity, SwitchEntity, ABC):
     """Representation of a Plenticore Switch."""
 
+    _attr_entity_category = EntityCategory.CONFIG
+
     def __init__(
         self,
         coordinator,