diff --git a/homeassistant/components/indevolt/const.py b/homeassistant/components/indevolt/const.py
index 6d6dd840345..c5d8d5b748a 100644
--- a/homeassistant/components/indevolt/const.py
+++ b/homeassistant/components/indevolt/const.py
@@ -32,6 +32,7 @@ SENSOR_KEYS: Final[dict[int, list[str]]] = {
         IndevoltSystem.OFF_GRID_OUTPUT_ENERGY,
         IndevoltSystem.BYPASS_POWER,
         IndevoltSystem.BYPASS_INPUT_ENERGY,
+        IndevoltBattery.RATED_CAPACITY,
         IndevoltBattery.DAILY_CHARGING_ENERGY,
         IndevoltBattery.DAILY_DISCHARGING_ENERGY,
         IndevoltBattery.TOTAL_CHARGING_ENERGY,
@@ -78,7 +79,7 @@ SENSOR_KEYS: Final[dict[int, list[str]]] = {
         IndevoltSolar.DC_INPUT_POWER_2,
         IndevoltSolar.DC_INPUT_POWER_3,
         IndevoltSolar.DC_INPUT_POWER_4,
-        IndevoltBattery.RATED_CAPACITY_GEN2,
+        IndevoltBattery.RATED_CAPACITY,
         IndevoltSystem.BYPASS_POWER,
         IndevoltSystem.TOTAL_OUTPUT_ENERGY,
         IndevoltSystem.OFF_GRID_OUTPUT_ENERGY,
diff --git a/homeassistant/components/indevolt/sensor.py b/homeassistant/components/indevolt/sensor.py
index bef3ac0d3e5..eb637919193 100644
--- a/homeassistant/components/indevolt/sensor.py
+++ b/homeassistant/components/indevolt/sensor.py
@@ -73,12 +73,10 @@ SENSORS: Final = (
         device_class=SensorDeviceClass.ENUM,
     ),
     IndevoltSensorEntityDescription(
-        key=IndevoltBattery.RATED_CAPACITY_GEN2,
-        generation=(2,),
+        key=IndevoltBattery.RATED_CAPACITY,
         translation_key="rated_capacity",
         native_unit_of_measurement=UnitOfEnergy.KILO_WATT_HOUR,
         device_class=SensorDeviceClass.ENERGY,
-        state_class=SensorStateClass.TOTAL_INCREASING,
     ),
     IndevoltSensorEntityDescription(
         key=IndevoltConfig.READ_DISCHARGE_LIMIT,
diff --git a/tests/components/indevolt/snapshots/test_diagnostics.ambr b/tests/components/indevolt/snapshots/test_diagnostics.ambr
index ae2671391d7..1e7a2cc4c9f 100644
--- a/tests/components/indevolt/snapshots/test_diagnostics.ambr
+++ b/tests/components/indevolt/snapshots/test_diagnostics.ambr
@@ -3,6 +3,7 @@
   dict({
     'coordinator_data': dict({
       '11034': 0,
+      '142': 1.64,
       '1501': 0,
       '1502': 0,
       '1505': 553673,
diff --git a/tests/components/indevolt/snapshots/test_sensor.ambr b/tests/components/indevolt/snapshots/test_sensor.ambr
index 2a13ed8b1d8..b4e05c9bcd5 100644
--- a/tests/components/indevolt/snapshots/test_sensor.ambr
+++ b/tests/components/indevolt/snapshots/test_sensor.ambr
@@ -1804,6 +1804,61 @@
     'state': '0',
   })
 # ---
+# name: test_sensor[1][sensor.bk1600_rated_capacity-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': None,
+    'entity_id': 'sensor.bk1600_rated_capacity',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': 'Rated capacity',
+    'options': dict({
+      'sensor': dict({
+        'suggested_display_precision': 2,
+      }),
+    }),
+    'original_device_class': <SensorDeviceClass.ENERGY: 'energy'>,
+    'original_icon': None,
+    'original_name': 'Rated capacity',
+    'platform': 'indevolt',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': 'rated_capacity',
+    'unique_id': 'BK1600-12345678_142',
+    'unit_of_measurement': <UnitOfEnergy.KILO_WATT_HOUR: 'kWh'>,
+  })
+# ---
+# name: test_sensor[1][sensor.bk1600_rated_capacity-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'energy',
+      'friendly_name': 'BK1600 Rated capacity',
+      'unit_of_measurement': <UnitOfEnergy.KILO_WATT_HOUR: 'kWh'>,
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.bk1600_rated_capacity',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': '1.64',
+  })
+# ---
 # name: test_sensor[1][sensor.bk1600_real_time_mode-entry]
   EntityRegistryEntrySnapshot({
     'aliases': list([
@@ -6360,9 +6415,7 @@
       None,
     ]),
     'area_id': None,
-    'capabilities': dict({
-      'state_class': <SensorStateClass.TOTAL_INCREASING: 'total_increasing'>,
-    }),
+    'capabilities': None,
     'config_entry_id': <ANY>,
     'config_subentry_id': <ANY>,
     'device_class': None,
@@ -6401,7 +6454,6 @@
     'attributes': ReadOnlyDict({
       'device_class': 'energy',
       'friendly_name': 'CMS-SF2000 Rated capacity',
-      'state_class': <SensorStateClass.TOTAL_INCREASING: 'total_increasing'>,
       'unit_of_measurement': <UnitOfEnergy.KILO_WATT_HOUR: 'kWh'>,
     }),
     'context': <ANY>,