diff --git a/homeassistant/components/tessie/update.py b/homeassistant/components/tessie/update.py
index 457978f232f..1d2fb59c492 100644
--- a/homeassistant/components/tessie/update.py
+++ b/homeassistant/components/tessie/update.py
@@ -65,7 +65,7 @@ class TessieUpdateEntity(TessieEntity, UpdateEntity):
             TessieUpdateStatus.WIFI_WAIT,
         ):
             return self.get("vehicle_state_software_update_version")
-        return None
+        return self.installed_version
 
     @property
     def in_progress(self) -> bool | int | None: