diff --git a/homeassistant/components/bosch_shc/strings.json b/homeassistant/components/bosch_shc/strings.json
index f5e4cc400c81..b9c92503ab5d 100644
--- a/homeassistant/components/bosch_shc/strings.json
+++ b/homeassistant/components/bosch_shc/strings.json
@@ -101,6 +101,9 @@
       "child_lock": {
         "name": "Child lock"
       },
+      "nightly_promise_enabled": {
+        "name": "Heartbeat"
+      },
       "pet_immunity_enabled": {
         "name": "Pet immunity"
       },
diff --git a/homeassistant/components/bosch_shc/switch.py b/homeassistant/components/bosch_shc/switch.py
index 6ffd56be5220..313db8b32806 100644
--- a/homeassistant/components/bosch_shc/switch.py
+++ b/homeassistant/components/bosch_shc/switch.py
@@ -108,6 +108,15 @@ SWITCH_TYPES: dict[str, SHCSwitchEntityDescription] = {
         on_value=BypassService.State.BYPASS_ACTIVE,
         should_poll=False,
     ),
+    "nightly_promise_enabled": SHCSwitchEntityDescription(
+        key="nightly_promise_enabled",
+        translation_key="nightly_promise_enabled",
+        device_class=SwitchDeviceClass.SWITCH,
+        entity_category=EntityCategory.CONFIG,
+        on_key="nightly_promise_enabled",
+        on_value=True,
+        should_poll=False,
+    ),
     "pet_immunity_enabled": SHCSwitchEntityDescription(
         key="pet_immunity_enabled",
         translation_key="pet_immunity_enabled",
@@ -278,6 +287,18 @@ async def async_setup_entry(
         for switch in session.device_helper.motion_detectors2
     )
 
+    entities.extend(
+        SHCSwitch(
+            hass=hass,
+            device=switch,
+            parent_id=shc_info.unique_id,
+            entry_id=config_entry.entry_id,
+            description=SWITCH_TYPES["nightly_promise_enabled"],
+        )
+        for switch in session.device_helper.twinguards
+        if switch.supports_nightly_promise
+    )
+
     async_add_entities(entities)
 
 
diff --git a/tests/components/bosch_shc/conftest.py b/tests/components/bosch_shc/conftest.py
index 1fc833076608..0c7e2017e68d 100644
--- a/tests/components/bosch_shc/conftest.py
+++ b/tests/components/bosch_shc/conftest.py
@@ -20,6 +20,7 @@ from boschshcpy import (
     SHCShutterControl,
     SHCSmartPlug,
     SHCThermostat,
+    SHCTwinguard,
     ShutterControlService,
     ThermostatService,
 )
@@ -354,3 +355,25 @@ def motion_detector2_device(
     device.status = "AVAILABLE"
     device.pet_immunity_enabled = pet_immunity_enabled
     return device
+
+
+def twinguard_device(
+    device_id: str = "hdm:HomeMaticIP:twinguard1",
+    name: str = "Twinguard",
+    supports_nightly_promise: bool = False,
+    nightly_promise_enabled: bool = False,
+) -> SHCTwinguard:
+    """Build a minimal device double for the twinguards bucket."""
+    device = create_autospec(SHCTwinguard, instance=True, spec_set=True)
+    device.name = name
+    device.id = device_id
+    device.root_device_id = "test-mac"
+    device.serial = f"serial-{device_id}"
+    device.manufacturer = "Bosch"
+    device.device_model = "TWINGUARD"
+    device.device_services = []
+    device.deleted = False
+    device.status = "AVAILABLE"
+    device.supports_nightly_promise = supports_nightly_promise
+    device.nightly_promise_enabled = nightly_promise_enabled
+    return device
diff --git a/tests/components/bosch_shc/test_switch.py b/tests/components/bosch_shc/test_switch.py
index d21f63c378e4..9eba20234345 100644
--- a/tests/components/bosch_shc/test_switch.py
+++ b/tests/components/bosch_shc/test_switch.py
@@ -25,6 +25,7 @@ from .conftest import (
     shutter_contact2_device,
     smart_plug_device,
     thermostat_device,
+    twinguard_device,
 )
 
 from tests.common import MockConfigEntry
@@ -354,3 +355,63 @@ async def test_motion_detector2_pet_immunity(
         blocking=True,
     )
     assert device.pet_immunity_enabled is False
+
+
+@pytest.mark.parametrize(
+    "device_buckets",
+    [
+        {
+            "twinguards": [
+                twinguard_device(
+                    supports_nightly_promise=True, nightly_promise_enabled=False
+                )
+            ]
+        }
+    ],
+    indirect=True,
+)
+@pytest.mark.usefixtures("mock_session")
+async def test_twinguard_nightly_promise(
+    hass: HomeAssistant,
+    mock_session: MagicMock,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """A Twinguard's nightly promise (Heartbeat) is exposed and controllable as a switch."""
+    await setup_integration(hass, mock_config_entry)
+    device = mock_session.device_helper.twinguards[0]
+
+    state = hass.states.get("switch.twinguard_heartbeat")
+    assert state is not None
+    assert state.state == "off"
+
+    await hass.services.async_call(
+        SWITCH_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: "switch.twinguard_heartbeat"},
+        blocking=True,
+    )
+    assert device.nightly_promise_enabled is True
+
+    await hass.services.async_call(
+        SWITCH_DOMAIN,
+        SERVICE_TURN_OFF,
+        {ATTR_ENTITY_ID: "switch.twinguard_heartbeat"},
+        blocking=True,
+    )
+    assert device.nightly_promise_enabled is False
+
+
+@pytest.mark.parametrize(
+    "device_buckets",
+    [{"twinguards": [twinguard_device(supports_nightly_promise=False)]}],
+    indirect=True,
+)
+@pytest.mark.usefixtures("mock_session")
+async def test_twinguard_no_nightly_promise_support(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """No switch is created for a Twinguard without nightly-promise support."""
+    await setup_integration(hass, mock_config_entry)
+
+    assert hass.states.get("switch.twinguard_heartbeat") is None