diff --git a/Growatt MIC 1500 TL-X/Growatt MIC 1500 TL-X.yaml b/Growatt MIC 1500 TL-X/Growatt MIC 1500 TL-X.yaml
index 1d09c53..b14b31c 100644
--- a/Growatt MIC 1500 TL-X/Growatt MIC 1500 TL-X.yaml	
+++ b/Growatt MIC 1500 TL-X/Growatt MIC 1500 TL-X.yaml	
@@ -54,6 +54,20 @@ modbus_controller:
     address: 1
     modbus_id: modbus1
     setup_priority: -10
+    on_online:
+      then:
+        - output.turn_on: light_gr
+    on_offline:
+      then:
+        - output.turn_off: light_gr
+
+script:
+  - id: blink_blue
+    mode: single
+    then:
+      - output.turn_on: light_bl
+      - delay: 200ms
+      - output.turn_off: light_bl
 
 sensor:
   # --- PV Eingang ---
@@ -70,6 +84,9 @@ sensor:
     accuracy_decimals: 1
     filters:
       - multiply: 0.1
+    on_value:
+      then:
+        - script.execute: blink_blue
 
   - platform: modbus_controller
     name: "PV Current"
diff --git a/Growatt SPH 5000 TL3/Growatt SPH 5000 TL3-BH-UP.yaml b/Growatt SPH 5000 TL3/Growatt SPH 5000 TL3-BH-UP.yaml
index 48158b6..8c12c38 100644
--- a/Growatt SPH 5000 TL3/Growatt SPH 5000 TL3-BH-UP.yaml	
+++ b/Growatt SPH 5000 TL3/Growatt SPH 5000 TL3-BH-UP.yaml	
@@ -54,6 +54,20 @@ modbus_controller:
     address: 1
     modbus_id: modbus1
     setup_priority: -10
+    on_online:
+      then:
+        - output.turn_on: light_gr
+    on_offline:
+      then:
+        - output.turn_off: light_gr
+
+script:
+  - id: blink_blue
+    mode: single
+    then:
+      - output.turn_on: light_bl
+      - delay: 200ms
+      - output.turn_off: light_bl
 
 sensor:
   # --- PV Eingang ---
@@ -70,6 +84,9 @@ sensor:
     accuracy_decimals: 1
     filters:
       - multiply: 0.1
+    on_value:
+      then:
+        - script.execute: blink_blue
 
   - platform: modbus_controller
     name: "PV1 Current"