diff --git a/homeassistant/components/fronius/__init__.py b/homeassistant/components/fronius/__init__.py
index 793f381d52f..c05f18107a0 100644
--- a/homeassistant/components/fronius/__init__.py
+++ b/homeassistant/components/fronius/__init__.py
@@ -16,7 +16,7 @@ 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.device_registry import DeviceInfo
-from homeassistant.helpers.dispatcher import dispatcher_send
+from homeassistant.helpers.dispatcher import async_dispatcher_send
 from homeassistant.helpers.event import async_track_time_interval
 
 from .const import (
@@ -204,7 +204,7 @@ class FroniusSolarNet:
 
             # Only for re-scans. Initial setup adds entities through sensor.async_setup_entry
             if self.config_entry.state == ConfigEntryState.LOADED:
-                dispatcher_send(self.hass, SOLAR_NET_DISCOVERY_NEW, _coordinator)
+                async_dispatcher_send(self.hass, SOLAR_NET_DISCOVERY_NEW, _coordinator)
 
             _LOGGER.debug(
                 "New inverter added (UID: %s)",
diff --git a/homeassistant/components/fronius/sensor.py b/homeassistant/components/fronius/sensor.py
index dfc76ae1415..f11855ce7e2 100644
--- a/homeassistant/components/fronius/sensor.py
+++ b/homeassistant/components/fronius/sensor.py
@@ -661,7 +661,7 @@ class _FroniusSensorEntity(CoordinatorEntity["FroniusCoordinatorBase"], SensorEn
         if new_value is None:
             return self.entity_description.default_value
         if self.entity_description.invalid_when_falsy and not new_value:
-            raise ValueError(f"Ignoring zero value for {self.entity_id}.")
+            return None
         if isinstance(new_value, float):
             return round(new_value, 4)
         return new_value
@@ -671,10 +671,9 @@ class _FroniusSensorEntity(CoordinatorEntity["FroniusCoordinatorBase"], SensorEn
         """Handle updated data from the coordinator."""
         try:
             self._attr_native_value = self._get_entity_value()
-        except (KeyError, ValueError):
+        except KeyError:
             # sets state to `None` if no default_value is defined in entity description
             # KeyError: raised when omitted in response - eg. at night when no production
-            # ValueError: raised when invalid zero value received
             self._attr_native_value = self.entity_description.default_value
         self.async_write_ha_state()