From 18a6ac26276034dd113709ef8883f6766e6138fd Mon Sep 17 00:00:00 2001
From: Stefan Agner <stefan@agner.ch>
Date: Mon, 31 Aug 2026 15:44:15 +0200
Subject: [PATCH] Use reactive power device class for iotawatt VAR sensors
 (#180913)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
---
 homeassistant/components/iotawatt/const.py  |  1 -
 homeassistant/components/iotawatt/sensor.py |  7 +++---
 tests/components/iotawatt/__init__.py       | 10 +++++++++
 tests/components/iotawatt/test_sensor.py    | 24 ++++++++++++++++++++-
 4 files changed, 37 insertions(+), 5 deletions(-)

diff --git a/homeassistant/components/iotawatt/const.py b/homeassistant/components/iotawatt/const.py
index 01034ae2a703..a343ed2a5afe 100644
--- a/homeassistant/components/iotawatt/const.py
+++ b/homeassistant/components/iotawatt/const.py
@@ -5,7 +5,6 @@ import json
 import httpx
 
 DOMAIN = "iotawatt"
-VOLT_AMPERE_REACTIVE = "VAR"
 VOLT_AMPERE_REACTIVE_HOURS = "VARh"
 
 CONNECTION_ERRORS = (KeyError, json.JSONDecodeError, httpx.HTTPError)
diff --git a/homeassistant/components/iotawatt/sensor.py b/homeassistant/components/iotawatt/sensor.py
index 444e7e010ba1..4f874db65f4b 100644
--- a/homeassistant/components/iotawatt/sensor.py
+++ b/homeassistant/components/iotawatt/sensor.py
@@ -21,6 +21,7 @@ from homeassistant.const import (
     UnitOfEnergy,
     UnitOfFrequency,
     UnitOfPower,
+    UnitOfReactivePower,
 )
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import device_registry as dr, entity_registry as er
@@ -29,7 +30,7 @@ from homeassistant.helpers.typing import StateType
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 from homeassistant.util import dt as dt_util
 
-from .const import VOLT_AMPERE_REACTIVE, VOLT_AMPERE_REACTIVE_HOURS
+from .const import VOLT_AMPERE_REACTIVE_HOURS
 from .coordinator import IotawattConfigEntry, IotawattUpdater
 
 _LOGGER = logging.getLogger(__name__)
@@ -87,9 +88,9 @@ ENTITY_DESCRIPTION_KEY_MAP: dict[str, IotaWattSensorEntityDescription] = {
     ),
     "VAR": IotaWattSensorEntityDescription(
         key="VAR",
-        native_unit_of_measurement=VOLT_AMPERE_REACTIVE,
+        native_unit_of_measurement=UnitOfReactivePower.VOLT_AMPERE_REACTIVE,
         state_class=SensorStateClass.MEASUREMENT,
-        icon="mdi:flash",
+        device_class=SensorDeviceClass.REACTIVE_POWER,
         entity_registry_enabled_default=False,
     ),
     "VARh": IotaWattSensorEntityDescription(
diff --git a/tests/components/iotawatt/__init__.py b/tests/components/iotawatt/__init__.py
index 5233ce6fc83e..b93de348db55 100644
--- a/tests/components/iotawatt/__init__.py
+++ b/tests/components/iotawatt/__init__.py
@@ -23,3 +23,13 @@ OUTPUT_SENSOR = Sensor(
     mac_addr="mock-mac",
     fromStart=True,
 )
+VAR_OUTPUT_SENSOR = Sensor(
+    channel="N/A",
+    base_name="My VAR Sensor",
+    suffix=None,
+    io_type="Output",
+    unit="VAR",
+    value=500,
+    begin="",
+    mac_addr="mock-mac",
+)
diff --git a/tests/components/iotawatt/test_sensor.py b/tests/components/iotawatt/test_sensor.py
index 1d07e416976b..96d864bfa82d 100644
--- a/tests/components/iotawatt/test_sensor.py
+++ b/tests/components/iotawatt/test_sensor.py
@@ -18,12 +18,13 @@ from homeassistant.const import (
     ATTR_UNIT_OF_MEASUREMENT,
     UnitOfEnergy,
     UnitOfPower,
+    UnitOfReactivePower,
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import device_registry as dr, entity_registry as er
 from homeassistant.setup import async_setup_component
 
-from . import INPUT_SENSOR, OUTPUT_SENSOR
+from . import INPUT_SENSOR, OUTPUT_SENSOR, VAR_OUTPUT_SENSOR
 
 from tests.common import MockConfigEntry, async_fire_time_changed
 
@@ -122,3 +123,24 @@ async def test_output_sensor_not_attached_to_device(
     assert entity_registry.async_get("sensor.my_watthour_sensor") is None
 
     assert "attempts to attach a device to an entity" not in caplog.text
+
+
+async def test_sensor_type_output_reactive_power(
+    hass: HomeAssistant, mock_iotawatt: MagicMock
+) -> None:
+    """Test reactive power output sensors work."""
+    mock_iotawatt.getSensors.return_value["sensors"]["my_var_sensor_key"] = (
+        VAR_OUTPUT_SENSOR
+    )
+    assert await async_setup_component(hass, DOMAIN, {})
+    await hass.async_block_till_done()
+
+    state = hass.states.get("sensor.my_var_sensor")
+    assert state is not None
+    assert state.state == "500"
+    assert state.attributes[ATTR_STATE_CLASS] is SensorStateClass.MEASUREMENT
+    assert (
+        state.attributes[ATTR_UNIT_OF_MEASUREMENT]
+        == UnitOfReactivePower.VOLT_AMPERE_REACTIVE
+    )
+    assert state.attributes[ATTR_DEVICE_CLASS] == SensorDeviceClass.REACTIVE_POWER