diff --git a/homeassistant/components/kostal_plenticore/number.py b/homeassistant/components/kostal_plenticore/number.py
index 69fba631b34..e8878deb48d 100644
--- a/homeassistant/components/kostal_plenticore/number.py
+++ b/homeassistant/components/kostal_plenticore/number.py
@@ -9,11 +9,11 @@ import logging
 from kostal.plenticore import SettingsData
 
 from homeassistant.components.number import (
+    NumberDeviceClass,
     NumberEntity,
     NumberEntityDescription,
     NumberMode,
 )
-from homeassistant.components.sensor import SensorDeviceClass
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import PERCENTAGE, POWER_WATT
 from homeassistant.core import HomeAssistant
@@ -62,7 +62,7 @@ NUMBER_SETTINGS_DATA = [
     ),
     PlenticoreNumberEntityDescription(
         key="battery_min_home_consumption",
-        device_class=SensorDeviceClass.POWER,
+        device_class=NumberDeviceClass.POWER,
         entity_category=EntityCategory.CONFIG,
         entity_registry_enabled_default=False,
         name="Battery min Home Consumption",
diff --git a/homeassistant/components/number/__init__.py b/homeassistant/components/number/__init__.py
index c8fd3c27972..ae4d2e5a762 100644
--- a/homeassistant/components/number/__init__.py
+++ b/homeassistant/components/number/__init__.py
@@ -376,6 +376,7 @@ async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
 class NumberEntityDescription(EntityDescription):
     """A class that describes number entities."""
 
+    device_class: NumberDeviceClass | None = None
     max_value: None = None
     min_value: None = None
     native_max_value: float | None = None
@@ -437,6 +438,7 @@ class NumberEntity(Entity):
     """Representation of a Number entity."""
 
     entity_description: NumberEntityDescription
+    _attr_device_class: NumberDeviceClass | None
     _attr_max_value: None
     _attr_min_value: None
     _attr_mode: NumberMode = NumberMode.AUTO
@@ -501,6 +503,15 @@ class NumberEntity(Entity):
             ATTR_MODE: self.mode,
         }
 
+    @property
+    def device_class(self) -> NumberDeviceClass | None:
+        """Return the class of this entity."""
+        if hasattr(self, "_attr_device_class"):
+            return self._attr_device_class
+        if hasattr(self, "entity_description"):
+            return self.entity_description.device_class
+        return None
+
     @property
     def native_min_value(self) -> float:
         """Return the minimum value."""
diff --git a/pylint/plugins/hass_enforce_type_hints.py b/pylint/plugins/hass_enforce_type_hints.py
index e159a110334..24f06bc8cd1 100644
--- a/pylint/plugins/hass_enforce_type_hints.py
+++ b/pylint/plugins/hass_enforce_type_hints.py
@@ -1987,7 +1987,7 @@ _INHERITANCE_MATCH: dict[str, list[ClassTypeHintMatch]] = {
             matches=[
                 TypeHintMatch(
                     function_name="device_class",
-                    return_type=["NumberDeviceClass", "str", None],
+                    return_type=["NumberDeviceClass", None],
                 ),
                 TypeHintMatch(
                     function_name="capability_attributes",