diff --git a/src/ha_addon_sunsynk_multi/sensor_callback.py b/src/ha_addon_sunsynk_multi/sensor_callback.py
index d266c2e1..1d39c8f4 100644
--- a/src/ha_addon_sunsynk_multi/sensor_callback.py
+++ b/src/ha_addon_sunsynk_multi/sensor_callback.py
@@ -88,6 +88,8 @@ async def callback_sensor(now: int) -> None:
         sensors_to_read: set[Sensor] = set()
         sensors_to_publish: set[ASensor] = set()
 
+        await ist.inv.connect()  # Check that we are connected #395
+
         # Flush pending writes
         while ist.write_queue:
             sensor, value = ist.write_queue.popitem()