diff --git a/homeassistant/components/victron_gx/button.py b/homeassistant/components/victron_gx/button.py
index 032ffae69370b0..f94ae611dcaae4 100644
--- a/homeassistant/components/victron_gx/button.py
+++ b/homeassistant/components/victron_gx/button.py
@@ -51,6 +51,8 @@ def on_new_metric(
 class VictronButton(VictronBaseEntity, ButtonEntity):
     """Implementation of a Victron GX button entity."""
 
+    _follow_metric_availability = False
+
     @callback
     @override
     def _on_update_cb(self, _value: Any) -> None:
diff --git a/homeassistant/components/victron_gx/device_tracker.py b/homeassistant/components/victron_gx/device_tracker.py
index 58b8adda7b2a1e..956b0d0330e79c 100644
--- a/homeassistant/components/victron_gx/device_tracker.py
+++ b/homeassistant/components/victron_gx/device_tracker.py
@@ -1,12 +1,13 @@
 """Support for Victron GX device tracker."""
 
-from typing import Any, override
+from typing import TYPE_CHECKING, override
 
 from victron_mqtt import (
     Device as VictronVenusDevice,
     GpsLocation,
     Metric as VictronVenusMetric,
     MetricKind,
+    MetricValue,
 )
 
 from homeassistant.components.device_tracker import TrackerEntity
@@ -63,11 +64,16 @@ def __init__(
     ) -> None:
         """Initialize the device tracker."""
         super().__init__(device, metric, device_info, installation_id)
-        self._update_from_location(metric.value)
+        value = metric.value
+        if TYPE_CHECKING:
+            assert value is None or isinstance(value, GpsLocation)
+        self._update_from_location(value)
 
     @callback
     @override
-    def _on_update_cb(self, value: Any) -> None:
+    def _on_update_cb(self, value: MetricValue) -> None:
+        if TYPE_CHECKING:
+            assert value is None or isinstance(value, GpsLocation)
         self._update_from_location(value)
         self.async_write_ha_state()
 
diff --git a/homeassistant/components/victron_gx/entity.py b/homeassistant/components/victron_gx/entity.py
index 82ac0809d88b1d..7c7523101e3f60 100644
--- a/homeassistant/components/victron_gx/entity.py
+++ b/homeassistant/components/victron_gx/entity.py
@@ -1,12 +1,13 @@
 """Base entity for entities in victron_gx integration."""
 
 from abc import abstractmethod
-from typing import Any, override
+from typing import override
 
 from victron_mqtt import (
     Device as VictronVenusDevice,
     Metric as VictronVenusMetric,
     MetricType,
+    MetricValue,
 )
 
 from homeassistant.const import EntityCategory
@@ -51,6 +52,7 @@ class VictronBaseEntity(Entity):
 
     _attr_should_poll = False
     _attr_has_entity_name = True
+    _follow_metric_availability = True
 
     def __init__(
         self,
@@ -62,6 +64,8 @@ def __init__(
         """Initialize the entity."""
         self._device = device
         self._metric = metric
+        if self._follow_metric_availability:
+            self._attr_available = metric.available
         self._attr_device_info = device_info
         self._attr_unique_id = f"{installation_id}_{metric.unique_id}"
         self._attr_suggested_display_precision = metric.precision
@@ -111,11 +115,17 @@ def _resolve_native_unit_of_measurement(self) -> str | None:
 
     @callback
     @abstractmethod
-    def _on_update_cb(self, value: Any) -> None:
+    def _on_update_cb(self, value: MetricValue) -> None:
         """Handle the metric update. Must be implemented by subclasses."""
 
     @callback
-    def _on_update(self, _: VictronVenusMetric, value: Any) -> None:
+    def _on_update(self, metric: VictronVenusMetric, value: MetricValue) -> None:
+        if self._follow_metric_availability and not metric.available:
+            if self._attr_available:
+                self._attr_available = False
+                self.async_write_ha_state()
+            return
+        self._attr_available = True
         self._on_update_cb(value)
 
     @override
diff --git a/homeassistant/components/victron_gx/manifest.json b/homeassistant/components/victron_gx/manifest.json
index d1832f469e87c8..82460492c8223b 100644
--- a/homeassistant/components/victron_gx/manifest.json
+++ b/homeassistant/components/victron_gx/manifest.json
@@ -7,7 +7,7 @@
   "integration_type": "hub",
   "iot_class": "local_push",
   "quality_scale": "platinum",
-  "requirements": ["victron-mqtt==2026.8.4"],
+  "requirements": ["victron-mqtt==2026.9.2"],
   "ssdp": [
     {
       "X_MqttOnLan": "1",
diff --git a/homeassistant/components/victron_gx/number.py b/homeassistant/components/victron_gx/number.py
index 668507ec4310be..36922be55b16ae 100644
--- a/homeassistant/components/victron_gx/number.py
+++ b/homeassistant/components/victron_gx/number.py
@@ -1,12 +1,13 @@
 """Support for Victron GX number entities."""
 
-from typing import TYPE_CHECKING, Any, override
+from typing import TYPE_CHECKING, override
 
 from victron_mqtt import (
     Device as VictronVenusDevice,
     Metric as VictronVenusMetric,
     MetricKind,
     MetricType,
+    MetricValue,
     WritableMetric as VictronVenusWritableMetric,
 )
 
@@ -77,7 +78,10 @@ def __init__(
         """Initialize the number entity."""
         super().__init__(device, metric, device_info, installation_id)
         self._attr_device_class = METRIC_TYPE_TO_DEVICE_CLASS.get(metric.metric_type)
-        self._attr_native_value = metric.value
+        value = metric.value
+        if TYPE_CHECKING:
+            assert value is None or isinstance(value, int | float)
+        self._attr_native_value = value
         if metric.min_value is not None:
             self._attr_native_min_value = metric.min_value
         if metric.max_value is not None:
@@ -93,7 +97,9 @@ def native_unit_of_measurement(self) -> str | None:
 
     @callback
     @override
-    def _on_update_cb(self, value: Any) -> None:
+    def _on_update_cb(self, value: MetricValue) -> None:
+        if TYPE_CHECKING:
+            assert value is None or isinstance(value, int | float)
         self._attr_native_value = value
         self.async_write_ha_state()
 
diff --git a/homeassistant/components/victron_gx/strings.json b/homeassistant/components/victron_gx/strings.json
index c81ec9e17a73c4..073c2227b2eeaa 100644
--- a/homeassistant/components/victron_gx/strings.json
+++ b/homeassistant/components/victron_gx/strings.json
@@ -338,6 +338,12 @@
       "hub4_ac_grid_setpoint": {
         "name": "AC grid setpoint"
       },
+      "hub4_max_charge_power": {
+        "name": "Maximum charge power"
+      },
+      "hub4_max_discharge_power": {
+        "name": "Maximum discharge power"
+      },
       "multi_ess_min_soc_limit": {
         "name": "ESS minimum SoC limit"
       },
@@ -347,6 +353,9 @@
       "multiplus_assist_current_boost_factor": {
         "name": "Assist current boost factor"
       },
+      "pvinverter_power_limit": {
+        "name": "Power limit"
+      },
       "solarcharger_charge_current_limit": {
         "name": "[%key:component::victron_gx::common::charge_current_limit%]"
       },
@@ -987,6 +996,18 @@
       "dcload_voltage": {
         "name": "[%key:component::victron_gx::common::voltage%]"
       },
+      "dcsource_current": {
+        "name": "[%key:component::victron_gx::common::current%]"
+      },
+      "dcsource_power": {
+        "name": "[%key:component::victron_gx::common::power%]"
+      },
+      "dcsource_temperature": {
+        "name": "[%key:component::victron_gx::common::temperature%]"
+      },
+      "dcsource_voltage": {
+        "name": "[%key:component::victron_gx::common::voltage%]"
+      },
       "dcsystem_aux_voltage": {
         "name": "Auxiliary voltage"
       },
@@ -1525,6 +1546,21 @@
       "platform_venus_firmware_installed_version": {
         "name": "Installed version"
       },
+      "platform_venus_firmware_progress": {
+        "name": "Firmware update progress"
+      },
+      "platform_venus_firmware_state": {
+        "name": "Firmware update state",
+        "state": {
+          "checking": "Checking",
+          "downloading_and_installing": "Downloading and installing",
+          "error_during_check": "Error during check",
+          "error_during_update": "Error during update",
+          "idle": "[%key:common::state::idle%]",
+          "rebooting": "Rebooting",
+          "update_file_not_found": "Update file not found"
+        }
+      },
       "pvinverter_current_phase": {
         "name": "Current {phase}"
       },
diff --git a/homeassistant/components/victron_gx/time.py b/homeassistant/components/victron_gx/time.py
index b6b426f8db9af4..633ad3f46e12df 100644
--- a/homeassistant/components/victron_gx/time.py
+++ b/homeassistant/components/victron_gx/time.py
@@ -2,12 +2,13 @@
 
 from datetime import time
 import logging
-from typing import TYPE_CHECKING, Any, override
+from typing import TYPE_CHECKING, override
 
 from victron_mqtt import (
     Device as VictronVenusDevice,
     Metric as VictronVenusMetric,
     MetricKind,
+    MetricValue,
     WritableMetric as VictronVenusWritableMetric,
 )
 
@@ -58,11 +59,16 @@ def __init__(
     ) -> None:
         """Initialize the time entity."""
         super().__init__(device, metric, device_info, installation_id)
-        self._attr_native_value = VictronTime.victron_time_to_time(metric.value)
+        value = metric.value
+        if TYPE_CHECKING:
+            assert value is None or isinstance(value, int | float)
+        self._attr_native_value = VictronTime.victron_time_to_time(value)
 
     @callback
     @override
-    def _on_update_cb(self, value: Any) -> None:
+    def _on_update_cb(self, value: MetricValue) -> None:
+        if TYPE_CHECKING:
+            assert value is None or isinstance(value, int | float)
         self._attr_native_value = VictronTime.victron_time_to_time(value)
         self.async_write_ha_state()
 
@@ -81,7 +87,7 @@ async def async_set_value(self, value: time) -> None:
         self._metric.set(total_minutes)
 
     @staticmethod
-    def victron_time_to_time(value: int | None) -> time | None:
+    def victron_time_to_time(value: float | None) -> time | None:
         """Convert minutes since midnight to time object."""
         if value is None:
             return None
diff --git a/requirements_all.txt b/requirements_all.txt
index 74285d09ff1c6e..450192469b46d3 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -3382,7 +3382,7 @@ viaggiatreno_ha==0.2.4
 victron-ble-ha-parser==0.7.0
 
 # homeassistant.components.victron_gx
-victron-mqtt==2026.8.4
+victron-mqtt==2026.9.2
 
 # homeassistant.components.victron_remote_monitoring
 victron-vrm==0.1.12
diff --git a/tests/components/victron_gx/test_device_tracker.py b/tests/components/victron_gx/test_device_tracker.py
index e086cd2615a560..57694d729cfe49 100644
--- a/tests/components/victron_gx/test_device_tracker.py
+++ b/tests/components/victron_gx/test_device_tracker.py
@@ -1,10 +1,13 @@
 """Tests for Victron GX MQTT device trackers."""
 
+from unittest.mock import MagicMock
+
 from victron_mqtt import Hub as VictronVenusHub
 from victron_mqtt.testing import finalize_injection, inject_message
 
 from homeassistant.components.device_tracker import SourceType, TrackingType
 from homeassistant.components.victron_gx.const import DOMAIN
+from homeassistant.const import STATE_UNAVAILABLE, STATE_UNKNOWN
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import device_registry as dr, entity_registry as er
 
@@ -122,6 +125,7 @@ async def test_victron_device_tracker(
 
     state = hass.states.get(entity.entity_id)
     assert state is not None
+    assert state.state == STATE_UNKNOWN
     assert state.attributes == {
         "source_type": SourceType.GPS,
         "altitude": None,
@@ -131,3 +135,12 @@ async def test_victron_device_tracker(
         "in_zones": [],
         "tracking_type": TrackingType.POSITION,
     }
+
+    metric = victron_hub.devices["gps_0"].get_metric("gps_location")
+    assert metric is not None
+    metric._keepalive(force_invalidate=True, log_debug=MagicMock())
+    await hass.async_block_till_done()
+
+    state = hass.states.get(entity.entity_id)
+    assert state is not None
+    assert state.state == STATE_UNAVAILABLE
diff --git a/tests/components/victron_gx/test_number.py b/tests/components/victron_gx/test_number.py
index 9c3395568f78db..08d36a39d2c76c 100644
--- a/tests/components/victron_gx/test_number.py
+++ b/tests/components/victron_gx/test_number.py
@@ -1,10 +1,13 @@
 """Tests for Victron GX MQTT number entities."""
 
+from unittest.mock import MagicMock
+
 from victron_mqtt import Hub as VictronVenusHub
 from victron_mqtt.testing import finalize_injection, inject_message
 
 from homeassistant.components.number import NumberDeviceClass
 from homeassistant.components.victron_gx.const import DOMAIN
+from homeassistant.const import STATE_UNAVAILABLE, STATE_UNKNOWN
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import device_registry as dr, entity_registry as er
 
@@ -98,6 +101,54 @@ async def test_victron_number_update(
     assert state.state == "58.0"
 
 
+async def test_nullable_number_availability(
+    hass: HomeAssistant,
+    init_integration: tuple[VictronVenusHub, MockConfigEntry],
+    entity_registry: er.EntityRegistry,
+) -> None:
+    """Test nullable values remain distinct from source unavailability."""
+    victron_hub, mock_config_entry = init_integration
+    topic = f"N/{MOCK_INSTALLATION_ID}/hub4/0/Overrides/MaxChargePower"
+
+    await inject_message(victron_hub, topic, '{"value": 1200.0}')
+    await finalize_injection(victron_hub, disconnect=False)
+    await hass.async_block_till_done()
+
+    entity = next(
+        entity
+        for entity in er.async_entries_for_config_entry(
+            entity_registry, mock_config_entry.entry_id
+        )
+        if entity.translation_key == "hub4_max_charge_power"
+    )
+    state = hass.states.get(entity.entity_id)
+    assert state is not None
+    assert state.state == "1200.0"
+
+    await inject_message(victron_hub, topic, '{"value": null}')
+    await hass.async_block_till_done()
+
+    state = hass.states.get(entity.entity_id)
+    assert state is not None
+    assert state.state == STATE_UNKNOWN
+
+    metric = victron_hub.devices["hub4_0"].get_metric("hub4_max_charge_power")
+    assert metric is not None
+    metric._keepalive(force_invalidate=True, log_debug=MagicMock())
+    await hass.async_block_till_done()
+
+    state = hass.states.get(entity.entity_id)
+    assert state is not None
+    assert state.state == STATE_UNAVAILABLE
+
+    await inject_message(victron_hub, topic, '{"value": 1300.0}')
+    await hass.async_block_till_done()
+
+    state = hass.states.get(entity.entity_id)
+    assert state is not None
+    assert state.state == "1300.0"
+
+
 async def test_victron_number_actions(
     hass: HomeAssistant,
     init_integration: tuple[VictronVenusHub, MockConfigEntry],