diff --git a/homeassistant/components/plugwise/binary_sensor.py b/homeassistant/components/plugwise/binary_sensor.py
index 25b1578cd8a..d0bfe0a2fe7 100644
--- a/homeassistant/components/plugwise/binary_sensor.py
+++ b/homeassistant/components/plugwise/binary_sensor.py
@@ -92,6 +92,7 @@ class SmileBinarySensor(PlugwiseEntity, BinarySensorEntity):
         super().__init__(api, coordinator, name, dev_id)
         self._binary_sensor = binary_sensor
         self._attr_is_on = False
+        self._attr_unique_id = f"{dev_id}-{binary_sensor}"
 
         if dev_id == self._api.heater_id:
             self._entity_name = "Auxiliary"
@@ -102,8 +103,6 @@ class SmileBinarySensor(PlugwiseEntity, BinarySensorEntity):
         if dev_id == self._api.gateway_id:
             self._entity_name = f"Smile {self._entity_name}"
 
-        self._unique_id = f"{dev_id}-{binary_sensor}"
-
     @callback
     def _async_process_data(self) -> None:
         """Update the entity."""
diff --git a/homeassistant/components/plugwise/climate.py b/homeassistant/components/plugwise/climate.py
index e3185c0701d..cba9b6a095a 100644
--- a/homeassistant/components/plugwise/climate.py
+++ b/homeassistant/components/plugwise/climate.py
@@ -99,6 +99,7 @@ class PwThermostat(PlugwiseEntity, ClimateEntity):
         """Set up the Plugwise API."""
         super().__init__(api, coordinator, name, dev_id)
         self._attr_extra_state_attributes = {}
+        self._attr_unique_id = f"{dev_id}-climate"
 
         self._api = api
         self._loc_id = loc_id
@@ -106,7 +107,6 @@ class PwThermostat(PlugwiseEntity, ClimateEntity):
 
         self._presets = None
         self._single_thermostat = self._api.single_master_thermostat()
-        self._unique_id = f"{dev_id}-climate"
 
     async def async_set_temperature(self, **kwargs: Any) -> None:
         """Set new target temperature."""
diff --git a/homeassistant/components/plugwise/entity.py b/homeassistant/components/plugwise/entity.py
index ed9f2c61a78..8a2526d4811 100644
--- a/homeassistant/components/plugwise/entity.py
+++ b/homeassistant/components/plugwise/entity.py
@@ -22,6 +22,8 @@ from .const import DOMAIN
 class PlugwiseEntity(CoordinatorEntity):
     """Represent a PlugWise Entity."""
 
+    _model: str | None = None
+
     def __init__(
         self, api: Smile, coordinator: DataUpdateCoordinator, name: str, dev_id: str
     ) -> None:
@@ -31,17 +33,8 @@ class PlugwiseEntity(CoordinatorEntity):
         self._api = api
         self._name = name
         self._dev_id = dev_id
-
-        self._unique_id: str | None = None
-        self._model: str | None = None
-
         self._entity_name = self._name
 
-    @property
-    def unique_id(self) -> str | None:
-        """Return a unique ID."""
-        return self._unique_id
-
     @property
     def name(self) -> str | None:
         """Return the name of the entity, if any."""
diff --git a/homeassistant/components/plugwise/sensor.py b/homeassistant/components/plugwise/sensor.py
index da09d4afa13..642a7a5e1e6 100644
--- a/homeassistant/components/plugwise/sensor.py
+++ b/homeassistant/components/plugwise/sensor.py
@@ -313,7 +313,9 @@ class SmileSensor(PlugwiseEntity, SensorEntity):
     ) -> None:
         """Initialise the sensor."""
         super().__init__(api, coordinator, name, dev_id)
+        self._attr_unique_id = f"{dev_id}-{sensor}"
         self._sensor = sensor
+
         if dev_id == self._api.heater_id:
             self._entity_name = "Auxiliary"
 
@@ -323,8 +325,6 @@ class SmileSensor(PlugwiseEntity, SensorEntity):
         if dev_id == self._api.gateway_id:
             self._entity_name = f"Smile {self._entity_name}"
 
-        self._unique_id = f"{dev_id}-{sensor}"
-
 
 class PwThermostatSensor(SmileSensor):
     """Thermostat (or generic) sensor devices."""
diff --git a/homeassistant/components/plugwise/switch.py b/homeassistant/components/plugwise/switch.py
index baefcaeb710..161728a9474 100644
--- a/homeassistant/components/plugwise/switch.py
+++ b/homeassistant/components/plugwise/switch.py
@@ -62,6 +62,7 @@ class GwSwitch(PlugwiseEntity, SwitchEntity):
     def __init__(self, api, coordinator, name, dev_id, members, model):
         """Set up the Plugwise API."""
         super().__init__(api, coordinator, name, dev_id)
+        self._attr_unique_id = f"{dev_id}-plug"
 
         self._members = members
         self._model = model
@@ -69,8 +70,6 @@ class GwSwitch(PlugwiseEntity, SwitchEntity):
         self._is_on = False
         self._icon = SWITCH_ICON
 
-        self._unique_id = f"{dev_id}-plug"
-
     @property
     def is_on(self):
         """Return true if device is on."""