diff --git a/homeassistant/components/fronius/const.py b/homeassistant/components/fronius/const.py
index 24492340d6..0aa763a658 100644
--- a/homeassistant/components/fronius/const.py
+++ b/homeassistant/components/fronius/const.py
@@ -96,3 +96,30 @@ def get_meter_location_description(code: StateType) -> MeterLocationCodeOption |
         case _ as _code if 256 <= _code <= 511:
             return MeterLocationCodeOption.SUBLOAD
     return None
+
+
+class OhmPilotStateCodeOption(StrEnum):
+    """OhmPilot state codes for Fronius inverters."""
+
+    # these are keys for state translations - so snake_case is used
+    UP_AND_RUNNING = "up_and_running"
+    KEEP_MINIMUM_TEMPERATURE = "keep_minimum_temperature"
+    LEGIONELLA_PROTECTION = "legionella_protection"
+    CRITICAL_FAULT = "critical_fault"
+    FAULT = "fault"
+    BOOST_MODE = "boost_mode"
+
+
+_OHMPILOT_STATE_CODES: Final[dict[int, OhmPilotStateCodeOption]] = {
+    0: OhmPilotStateCodeOption.UP_AND_RUNNING,
+    1: OhmPilotStateCodeOption.KEEP_MINIMUM_TEMPERATURE,
+    2: OhmPilotStateCodeOption.LEGIONELLA_PROTECTION,
+    3: OhmPilotStateCodeOption.CRITICAL_FAULT,
+    4: OhmPilotStateCodeOption.FAULT,
+    5: OhmPilotStateCodeOption.BOOST_MODE,
+}
+
+
+def get_ohmpilot_state_message(code: StateType) -> OhmPilotStateCodeOption | None:
+    """Return a status message for a given status code."""
+    return _OHMPILOT_STATE_CODES.get(code)  # type: ignore[arg-type]
diff --git a/homeassistant/components/fronius/sensor.py b/homeassistant/components/fronius/sensor.py
index 6c1e508ff7..cbab3177a5 100644
--- a/homeassistant/components/fronius/sensor.py
+++ b/homeassistant/components/fronius/sensor.py
@@ -34,8 +34,10 @@ from .const import (
     DOMAIN,
     InverterStatusCodeOption,
     MeterLocationCodeOption,
+    OhmPilotStateCodeOption,
     get_inverter_status_message,
     get_meter_location_description,
+    get_ohmpilot_state_message,
 )
 
 if TYPE_CHECKING:
@@ -496,7 +498,11 @@ OHMPILOT_ENTITY_DESCRIPTIONS: list[FroniusSensorEntityDescription] = [
     ),
     FroniusSensorEntityDescription(
         key="state_message",
+        response_key="state_code",
         entity_category=EntityCategory.DIAGNOSTIC,
+        device_class=SensorDeviceClass.ENUM,
+        options=[opt.value for opt in OhmPilotStateCodeOption],
+        value_fn=get_ohmpilot_state_message,
     ),
 ]
 
diff --git a/homeassistant/components/fronius/strings.json b/homeassistant/components/fronius/strings.json
index f86bbf8602..de06670464 100644
--- a/homeassistant/components/fronius/strings.json
+++ b/homeassistant/components/fronius/strings.json
@@ -218,7 +218,15 @@
         "name": "State code"
       },
       "state_message": {
-        "name": "State message"
+        "name": "State message",
+        "state": {
+          "up_and_running": "Up and running",
+          "keep_minimum_temperature": "Keep minimum temperature",
+          "legionella_protection": "Legionella protection",
+          "critical_fault": "Critical fault",
+          "fault": "Fault",
+          "boost_mode": "Boost mode"
+        }
       },
       "meter_mode": {
         "name": "Meter mode"
diff --git a/tests/components/fronius/test_sensor.py b/tests/components/fronius/test_sensor.py
index 0340fb4b5c..efa3b77197 100644
--- a/tests/components/fronius/test_sensor.py
+++ b/tests/components/fronius/test_sensor.py
@@ -360,7 +360,7 @@ async def test_gen24_storage(
     assert_state("sensor.ohmpilot_power", 0.0)
     assert_state("sensor.ohmpilot_temperature", 38.9)
     assert_state("sensor.ohmpilot_state_code", 0.0)
-    assert_state("sensor.ohmpilot_state_message", "Up and running")
+    assert_state("sensor.ohmpilot_state_message", "up_and_running")
     # power_flow
     assert_state("sensor.solarnet_power_grid", 2274.9)
     assert_state("sensor.solarnet_power_battery", 0.1591)