diff --git a/homeassistant/components/touchline_sl/__init__.py b/homeassistant/components/touchline_sl/__init__.py
index ba1da06ed5a..6f81b5b26e0 100644
--- a/homeassistant/components/touchline_sl/__init__.py
+++ b/homeassistant/components/touchline_sl/__init__.py
@@ -13,7 +13,7 @@ from homeassistant.helpers import device_registry as dr
 from .const import DOMAIN
 from .coordinator import TouchlineSLConfigEntry, TouchlineSLModuleCoordinator
 
-PLATFORMS: list[Platform] = [Platform.CLIMATE]
+PLATFORMS: list[Platform] = [Platform.CLIMATE, Platform.SENSOR]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: TouchlineSLConfigEntry) -> bool:
diff --git a/homeassistant/components/touchline_sl/sensor.py b/homeassistant/components/touchline_sl/sensor.py
new file mode 100644
index 00000000000..7d520ff51ce
--- /dev/null
+++ b/homeassistant/components/touchline_sl/sensor.py
@@ -0,0 +1,87 @@
+"""Roth Touchline SL sensor platform."""
+
+from __future__ import annotations
+
+from collections.abc import Callable
+from dataclasses import dataclass
+
+from pytouchlinesl import Zone
+
+from homeassistant.components.sensor import (
+    SensorDeviceClass,
+    SensorEntity,
+    SensorEntityDescription,
+    SensorStateClass,
+)
+from homeassistant.const import PERCENTAGE, EntityCategory
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
+
+from .coordinator import TouchlineSLConfigEntry, TouchlineSLModuleCoordinator
+from .entity import TouchlineSLZoneEntity
+
+PARALLEL_UPDATES = 0
+
+
+@dataclass(frozen=True, kw_only=True)
+class TouchlineSLSensorEntityDescription(SensorEntityDescription):
+    """Describes a Touchline SL sensor entity."""
+
+    value_fn: Callable[[Zone], int | None]
+    exists_fn: Callable[[Zone], bool] = lambda _: True
+
+
+SENSORS: tuple[TouchlineSLSensorEntityDescription, ...] = (
+    TouchlineSLSensorEntityDescription(
+        key="battery",
+        device_class=SensorDeviceClass.BATTERY,
+        entity_category=EntityCategory.DIAGNOSTIC,
+        native_unit_of_measurement=PERCENTAGE,
+        state_class=SensorStateClass.MEASUREMENT,
+        suggested_display_precision=0,
+        value_fn=lambda zone: zone.battery_level,
+        exists_fn=lambda zone: zone.battery_level is not None,
+    ),
+)
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: TouchlineSLConfigEntry,
+    async_add_entities: AddConfigEntryEntitiesCallback,
+) -> None:
+    """Set up Touchline SL sensors."""
+    coordinators = entry.runtime_data
+    async_add_entities(
+        TouchlineSLSensor(
+            coordinator=coordinator, zone_id=zone_id, description=description
+        )
+        for coordinator in coordinators
+        for zone_id in coordinator.data.zones
+        for description in SENSORS
+        if description.exists_fn(coordinator.data.zones[zone_id])
+    )
+
+
+class TouchlineSLSensor(TouchlineSLZoneEntity, SensorEntity):
+    """A sensor entity for a Roth Touchline SL zone."""
+
+    entity_description: TouchlineSLSensorEntityDescription
+
+    def __init__(
+        self,
+        coordinator: TouchlineSLModuleCoordinator,
+        zone_id: int,
+        description: TouchlineSLSensorEntityDescription,
+    ) -> None:
+        """Initialise a Touchline SL sensor."""
+        super().__init__(coordinator, zone_id)
+        self.entity_description = description
+        self._attr_unique_id = (
+            f"module-{coordinator.data.module.id}-zone-{zone_id}-{description.key}"
+        )
+
+    @property
+    def native_value(self) -> int | None:
+        """Return the sensor value."""
+        return self.entity_description.value_fn(self.zone)
diff --git a/tests/components/touchline_sl/test_sensor.py b/tests/components/touchline_sl/test_sensor.py
new file mode 100644
index 00000000000..046b5171d1d
--- /dev/null
+++ b/tests/components/touchline_sl/test_sensor.py
@@ -0,0 +1,96 @@
+"""Tests for the Roth Touchline SL sensor platform."""
+
+from unittest.mock import AsyncMock, MagicMock
+
+import pytest
+
+from homeassistant.const import STATE_UNAVAILABLE
+from homeassistant.core import HomeAssistant
+
+from .conftest import make_mock_module, make_mock_zone
+
+from tests.common import MockConfigEntry
+
+BATTERY_ENTITY_ID = "sensor.zone_1_battery"
+
+
+async def test_battery_sensor_with_battery(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_touchlinesl_client: MagicMock,
+) -> None:
+    """Test that the battery sensor reports the correct level."""
+    zone = make_mock_zone()
+    zone.battery_level = 85
+    module = make_mock_module([zone])
+    mock_touchlinesl_client.modules = AsyncMock(return_value=[module])
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    state = hass.states.get(BATTERY_ENTITY_ID)
+    assert state is not None
+    assert state.state == "85"
+
+
+async def test_battery_sensor_no_battery(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_touchlinesl_client: MagicMock,
+) -> None:
+    """Test that no battery sensor is created for wired zones without a battery."""
+    zone = make_mock_zone()
+    zone.battery_level = None
+    module = make_mock_module([zone])
+    mock_touchlinesl_client.modules = AsyncMock(return_value=[module])
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert hass.states.get(BATTERY_ENTITY_ID) is None
+
+
+async def test_battery_sensor_only_created_for_zones_with_battery(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_touchlinesl_client: MagicMock,
+) -> None:
+    """Test that battery sensors are only created for wireless zones."""
+    wired_zone = make_mock_zone(zone_id=1, name="Wired Zone")
+    wired_zone.battery_level = None
+    wireless_zone = make_mock_zone(zone_id=2, name="Wireless Zone")
+    wireless_zone.battery_level = 75
+
+    module = make_mock_module([wired_zone, wireless_zone])
+    mock_touchlinesl_client.modules = AsyncMock(return_value=[module])
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert hass.states.get("sensor.wired_zone_battery") is None
+    assert hass.states.get("sensor.wireless_zone_battery") is not None
+
+
+@pytest.mark.parametrize("alarm", ["no_communication", "sensor_damaged"])
+async def test_battery_sensor_unavailable_on_alarm(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_touchlinesl_client: MagicMock,
+    alarm: str,
+) -> None:
+    """Test that the battery sensor is unavailable when the zone has an alarm."""
+    zone = make_mock_zone(alarm=alarm)
+    zone.battery_level = 50
+    module = make_mock_module([zone])
+    mock_touchlinesl_client.modules = AsyncMock(return_value=[module])
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    state = hass.states.get(BATTERY_ENTITY_ID)
+    assert state is not None
+    assert state.state == STATE_UNAVAILABLE