diff --git a/homeassistant/components/imeon_inverter/const.py b/homeassistant/components/imeon_inverter/const.py
index 45d43b1c1efd..44413a4c3402 100644
--- a/homeassistant/components/imeon_inverter/const.py
+++ b/homeassistant/components/imeon_inverter/const.py
@@ -13,7 +13,7 @@ ATTR_INVERTER_STATE = [
     "unsynchronized",
     "grid_consumption",
     "grid_injection",
-    "grid_synchronised_but_not_used",
+    "grid_synchronized_but_not_used",
 ]
 ATTR_TIMELINE_STATUS = [
     "com_lost",
diff --git a/tests/components/imeon_inverter/snapshots/test_sensor.ambr b/tests/components/imeon_inverter/snapshots/test_sensor.ambr
index b860566a5165..5101880e7a57 100644
--- a/tests/components/imeon_inverter/snapshots/test_sensor.ambr
+++ b/tests/components/imeon_inverter/snapshots/test_sensor.ambr
@@ -1355,7 +1355,7 @@
         'unsynchronized',
         'grid_consumption',
         'grid_injection',
-        'grid_synchronised_but_not_used',
+        'grid_synchronized_but_not_used',
       ]),
     }),
     'config_entry_id': <ANY>,
@@ -1397,7 +1397,7 @@
         'unsynchronized',
         'grid_consumption',
         'grid_injection',
-        'grid_synchronised_but_not_used',
+        'grid_synchronized_but_not_used',
       ]),
     }),
     'context': <ANY>,