diff --git a/homeassistant/components/velux/__init__.py b/homeassistant/components/velux/__init__.py
index 4b89fc66a84..1b7cbd1ff93 100644
--- a/homeassistant/components/velux/__init__.py
+++ b/homeassistant/components/velux/__init__.py
@@ -108,10 +108,14 @@ class VeluxEntity(Entity):
 
     _attr_should_poll = False
 
-    def __init__(self, node: Node) -> None:
+    def __init__(self, node: Node, config_entry_id: str) -> None:
         """Initialize the Velux device."""
         self.node = node
-        self._attr_unique_id = node.serial_number
+        self._attr_unique_id = (
+            node.serial_number
+            if node.serial_number
+            else f"{config_entry_id}_{node.node_id}"
+        )
         self._attr_name = node.name if node.name else f"#{node.node_id}"
 
     @callback
diff --git a/homeassistant/components/velux/cover.py b/homeassistant/components/velux/cover.py
index c8688e4d186..cd7564eee81 100644
--- a/homeassistant/components/velux/cover.py
+++ b/homeassistant/components/velux/cover.py
@@ -29,7 +29,7 @@ async def async_setup_entry(
     """Set up cover(s) for Velux platform."""
     module = hass.data[DOMAIN][config.entry_id]
     async_add_entities(
-        VeluxCover(node)
+        VeluxCover(node, config.entry_id)
         for node in module.pyvlx.nodes
         if isinstance(node, OpeningDevice)
     )
@@ -41,9 +41,9 @@ class VeluxCover(VeluxEntity, CoverEntity):
     _is_blind = False
     node: OpeningDevice
 
-    def __init__(self, node: OpeningDevice) -> None:
+    def __init__(self, node: OpeningDevice, config_entry_id: str) -> None:
         """Initialize VeluxCover."""
-        super().__init__(node)
+        super().__init__(node, config_entry_id)
         self._attr_device_class = CoverDeviceClass.WINDOW
         if isinstance(node, Awning):
             self._attr_device_class = CoverDeviceClass.AWNING
diff --git a/homeassistant/components/velux/light.py b/homeassistant/components/velux/light.py
index bbe9822648e..e98632701f3 100644
--- a/homeassistant/components/velux/light.py
+++ b/homeassistant/components/velux/light.py
@@ -23,7 +23,7 @@ async def async_setup_entry(
     module = hass.data[DOMAIN][config.entry_id]
 
     async_add_entities(
-        VeluxLight(node)
+        VeluxLight(node, config.entry_id)
         for node in module.pyvlx.nodes
         if isinstance(node, LighteningDevice)
     )