diff --git a/packages/modules/devices/sonnen/sonnenbatterie/api.py b/packages/modules/devices/sonnen/sonnenbatterie/api.py
index 5689b6289f..d50672b2e0 100644
--- a/packages/modules/devices/sonnen/sonnenbatterie/api.py
+++ b/packages/modules/devices/sonnen/sonnenbatterie/api.py
@@ -136,6 +136,7 @@ class OperatingMode(Enum):
         MANUAL = "1"
         SELF_CONSUMPTION = "2"
         TIME_OF_USE = "10"
+        OPTIMIZATION = "11"
 
     class PowerMeterDirection(Enum):
         PRODUCTION = "production"