diff --git a/homeassistant/components/tessie/strings.json b/homeassistant/components/tessie/strings.json
index 4c2f1ebbb68..fa0c7f8c1f7 100644
--- a/homeassistant/components/tessie/strings.json
+++ b/homeassistant/components/tessie/strings.json
@@ -495,7 +495,7 @@
         "name": "Speed limit"
       },
       "off_grid_vehicle_charging_reserve_percent": {
-        "name": "Off grid reserve"
+        "name": "Off-grid reserve"
       }
     },
     "update": {
diff --git a/tests/components/tessie/snapshots/test_number.ambr b/tests/components/tessie/snapshots/test_number.ambr
index 0e43695ca78..e865058c4a2 100644
--- a/tests/components/tessie/snapshots/test_number.ambr
+++ b/tests/components/tessie/snapshots/test_number.ambr
@@ -88,7 +88,7 @@
     }),
     'original_device_class': <NumberDeviceClass.BATTERY: 'battery'>,
     'original_icon': 'mdi:battery-unknown',
-    'original_name': 'Off grid reserve',
+    'original_name': 'Off-grid reserve',
     'platform': 'tessie',
     'previous_unique_id': None,
     'supported_features': 0,
@@ -101,7 +101,7 @@
   StateSnapshot({
     'attributes': ReadOnlyDict({
       'device_class': 'battery',
-      'friendly_name': 'Energy Site Off grid reserve',
+      'friendly_name': 'Energy Site Off-grid reserve',
       'icon': 'mdi:battery-unknown',
       'max': 100,
       'min': 0,