diff --git a/packages/modules/devices/kostal/kostal_plenticore/bat.py b/packages/modules/devices/kostal/kostal_plenticore/bat.py
index bec16469fe..5065a75174 100644
--- a/packages/modules/devices/kostal/kostal_plenticore/bat.py
+++ b/packages/modules/devices/kostal/kostal_plenticore/bat.py
@@ -60,7 +60,7 @@ def update(self) -> None:
     # Timeout kann im Kostal UI geändert werden. Standardwert 30s
 
     def set_power_limit(self, power_limit: Optional[int]) -> None:
-        unit = self.device_config.configuration.modbus_id
+        unit = self.modbus_id
         log.debug(f'last_mode: {self.last_mode}')
 
         if power_limit is None: