diff --git a/homeassistant/components/fronius/__init__.py b/homeassistant/components/fronius/__init__.py
index f8dcb4f4a9c..6202b945d97 100644
--- a/homeassistant/components/fronius/__init__.py
+++ b/homeassistant/components/fronius/__init__.py
@@ -15,12 +15,13 @@ from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers import device_registry as dr
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
+from homeassistant.helpers.dispatcher import dispatcher_send
 from homeassistant.helpers.entity import DeviceInfo
-from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.event import async_track_time_interval
 
 from .const import (
     DOMAIN,
+    SOLAR_NET_DISCOVERY_NEW,
     SOLAR_NET_ID_SYSTEM,
     SOLAR_NET_RESCAN_TIMER,
     FroniusDeviceInfo,
@@ -34,7 +35,6 @@ from .coordinator import (
     FroniusPowerFlowUpdateCoordinator,
     FroniusStorageUpdateCoordinator,
 )
-from .sensor import InverterSensor
 
 _LOGGER: Final = logging.getLogger(__name__)
 PLATFORMS: Final = [Platform.SENSOR]
@@ -76,7 +76,6 @@ class FroniusSolarNet:
         self.cleanup_callbacks: list[Callable[[], None]] = []
         self.config_entry = entry
         self.coordinator_lock = asyncio.Lock()
-        self.sensor_async_add_entities: AddEntitiesCallback | None = None
         self.fronius = fronius
         self.host: str = entry.data[CONF_HOST]
         # entry.unique_id is either logger uid or first inverter uid if no logger available
@@ -204,10 +203,8 @@ class FroniusSolarNet:
             self.inverter_coordinators.append(_coordinator)
 
             # Only for re-scans. Initial setup adds entities through sensor.async_setup_entry
-            if self.sensor_async_add_entities is not None:
-                _coordinator.add_entities_for_seen_keys(
-                    self.sensor_async_add_entities, InverterSensor
-                )
+            if self.config_entry.state == ConfigEntryState.LOADED:
+                dispatcher_send(self.hass, SOLAR_NET_DISCOVERY_NEW, _coordinator)
 
             _LOGGER.debug(
                 "New inverter added (UID: %s)",
diff --git a/homeassistant/components/fronius/const.py b/homeassistant/components/fronius/const.py
index 042773472c5..b65864ee089 100644
--- a/homeassistant/components/fronius/const.py
+++ b/homeassistant/components/fronius/const.py
@@ -6,6 +6,7 @@ from homeassistant.helpers.entity import DeviceInfo
 DOMAIN: Final = "fronius"
 
 SolarNetId = str
+SOLAR_NET_DISCOVERY_NEW: Final = "fronius_discovery_new"
 SOLAR_NET_ID_POWER_FLOW: SolarNetId = "power_flow"
 SOLAR_NET_ID_SYSTEM: SolarNetId = "system"
 SOLAR_NET_RESCAN_TIMER: Final = 60
diff --git a/homeassistant/components/fronius/sensor.py b/homeassistant/components/fronius/sensor.py
index d701d0d1860..ff949af0cba 100644
--- a/homeassistant/components/fronius/sensor.py
+++ b/homeassistant/components/fronius/sensor.py
@@ -24,12 +24,13 @@ from homeassistant.const import (
     UnitOfTemperature,
 )
 from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity import DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import StateType
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
-from .const import DOMAIN
+from .const import DOMAIN, SOLAR_NET_DISCOVERY_NEW
 
 if TYPE_CHECKING:
     from . import FroniusSolarNet
@@ -53,7 +54,6 @@ async def async_setup_entry(
 ) -> None:
     """Set up Fronius sensor entities based on a config entry."""
     solar_net: FroniusSolarNet = hass.data[DOMAIN][config_entry.entry_id]
-    solar_net.sensor_async_add_entities = async_add_entities
 
     for inverter_coordinator in solar_net.inverter_coordinators:
         inverter_coordinator.add_entities_for_seen_keys(
@@ -80,6 +80,19 @@ async def async_setup_entry(
             async_add_entities, StorageSensor
         )
 
+    @callback
+    def async_add_new_entities(coordinator: FroniusInverterUpdateCoordinator) -> None:
+        """Add newly found inverter entities."""
+        coordinator.add_entities_for_seen_keys(async_add_entities, InverterSensor)
+
+    config_entry.async_on_unload(
+        async_dispatcher_connect(
+            hass,
+            SOLAR_NET_DISCOVERY_NEW,
+            async_add_new_entities,
+        )
+    )
+
 
 @dataclass
 class FroniusSensorEntityDescription(SensorEntityDescription):