diff --git a/custom_components/solarman/entity.py b/custom_components/solarman/entity.py
index 051491e..4ad73d9 100644
--- a/custom_components/solarman/entity.py
+++ b/custom_components/solarman/entity.py
@@ -61,7 +61,7 @@ def device_name(self) -> str:
 
     @property
     def available(self) -> bool:
-        return self.coordinator.last_update_success and self.coordinator.inverter.available()
+        return self.coordinator.last_update_success and self.coordinator.inverter.available
 
     @callback
     def _handle_coordinator_update(self) -> None: