diff --git a/homeassistant/components/enphase_envoy/coordinator.py b/homeassistant/components/enphase_envoy/coordinator.py
index e91e245658c..00bc7666f78 100644
--- a/homeassistant/components/enphase_envoy/coordinator.py
+++ b/homeassistant/components/enphase_envoy/coordinator.py
@@ -24,6 +24,7 @@ SCAN_INTERVAL = timedelta(seconds=60)
 
 TOKEN_REFRESH_CHECK_INTERVAL = timedelta(days=1)
 STALE_TOKEN_THRESHOLD = timedelta(days=30).total_seconds()
+NOTIFICATION_ID = "enphase_envoy_notification"
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -35,6 +36,7 @@ class EnphaseUpdateCoordinator(DataUpdateCoordinator[dict[str, Any]]):
     """DataUpdateCoordinator to gather data from any envoy."""
 
     envoy_serial_number: str
+    envoy_firmware: str
 
     def __init__(
         self, hass: HomeAssistant, envoy: Envoy, entry: EnphaseConfigEntry
@@ -46,6 +48,7 @@ class EnphaseUpdateCoordinator(DataUpdateCoordinator[dict[str, Any]]):
         self.username = entry_data[CONF_USERNAME]
         self.password = entry_data[CONF_PASSWORD]
         self._setup_complete = False
+        self.envoy_firmware = ""
         self._cancel_token_refresh: CALLBACK_TYPE | None = None
         super().__init__(
             hass,
@@ -158,6 +161,24 @@ class EnphaseUpdateCoordinator(DataUpdateCoordinator[dict[str, Any]]):
                 raise ConfigEntryAuthFailed from err
             except EnvoyError as err:
                 raise UpdateFailed(f"Error communicating with API: {err}") from err
+
+            # if we have a firmware version from previous setup, compare to current one
+            # when envoy gets new firmware there will be an authentication failure
+            # which results in getting fw version again, if so reload the integration.
+            if (current_firmware := self.envoy_firmware) and current_firmware != (
+                new_firmware := envoy.firmware
+            ):
+                _LOGGER.warning(
+                    "Envoy firmware changed from: %s to: %s, reloading enphase envoy integration",
+                    current_firmware,
+                    new_firmware,
+                )
+                # reload the integration to get all established again
+                self.hass.async_create_task(
+                    self.hass.config_entries.async_reload(self.entry.entry_id)
+                )
+            # remember firmware version for next time
+            self.envoy_firmware = envoy.firmware
             _LOGGER.debug("Envoy data: %s", envoy_data)
             return envoy_data.raw
 
diff --git a/tests/components/enphase_envoy/test_sensor.py b/tests/components/enphase_envoy/test_sensor.py
index 3156f154729..784dfe54073 100644
--- a/tests/components/enphase_envoy/test_sensor.py
+++ b/tests/components/enphase_envoy/test_sensor.py
@@ -1,6 +1,7 @@
 """Test Enphase Envoy sensors."""
 
 from itertools import chain
+import logging
 from unittest.mock import AsyncMock, patch
 
 from freezegun.api import FrozenDateTimeFactory
@@ -1002,3 +1003,36 @@ async def test_sensor_missing_data(
     # test the original inverter is now unknown
     assert (entity_state := hass.states.get("sensor.inverter_1"))
     assert entity_state.state == STATE_UNKNOWN
+
+
+@pytest.mark.parametrize(
+    ("mock_envoy"),
+    [
+        "envoy_metered_batt_relay",
+    ],
+    indirect=["mock_envoy"],
+)
+@pytest.mark.usefixtures("entity_registry_enabled_by_default")
+async def test_fw_update(
+    hass: HomeAssistant,
+    config_entry: MockConfigEntry,
+    mock_envoy: AsyncMock,
+    entity_registry: er.EntityRegistry,
+    freezer: FrozenDateTimeFactory,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test enphase_envoy sensor update over fw update."""
+    logging.getLogger("homeassistant.components.enphase_envoy").setLevel(logging.DEBUG)
+    with patch("homeassistant.components.enphase_envoy.PLATFORMS", [Platform.SENSOR]):
+        await setup_integration(hass, config_entry)
+
+    # force HA to detect changed data by changing raw
+    mock_envoy.firmware = "0.0.0"
+
+    # Move time to next update
+    freezer.tick(SCAN_INTERVAL)
+    async_fire_time_changed(hass)
+    await hass.async_block_till_done(wait_background_tasks=True)
+
+    assert "firmware changed from: " in caplog.text
+    assert "to: 0.0.0, reloading enphase envoy integration" in caplog.text