diff --git a/clearpath_generator_robot/clearpath_generator_robot/launch/generator.py b/clearpath_generator_robot/clearpath_generator_robot/launch/generator.py
index 9e7b2a5..28534ea 100644
--- a/clearpath_generator_robot/clearpath_generator_robot/launch/generator.py
+++ b/clearpath_generator_robot/clearpath_generator_robot/launch/generator.py
@@ -282,7 +282,7 @@ def __init__(self, setup_path: str = '/etc/clearpath/') -> None:
 
         # Only add estimator when no BMS is present
         if self.bms_launch_file is None and self.bms_node is None:
-            common_platform_components.extend(self.battery_state_estimator)
+            common_platform_components.append(self.battery_state_estimator)
 
         if len(self.can_bridges) > 0:
             common_platform_components.extend(self.can_bridges)