diff --git a/homeassistant/components/indevolt/coordinator.py b/homeassistant/components/indevolt/coordinator.py
index f6f2a18cb4a7..fba667f86854 100644
--- a/homeassistant/components/indevolt/coordinator.py
+++ b/homeassistant/components/indevolt/coordinator.py
@@ -17,6 +17,7 @@ from homeassistant.const import CONF_HOST, CONF_MODEL
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady, HomeAssistantError
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
+from homeassistant.helpers.device_registry import format_mac
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
 
 from .const import (
@@ -39,6 +40,7 @@ class IndevoltCoordinator(DataUpdateCoordinator[dict[str, Any]]):
     friendly_name: str
     config_entry: IndevoltConfigEntry
     firmware_version: str | None
+    mac_address: str | None
     serial_number: str
     device_model: str
     generation: int
@@ -74,8 +76,9 @@ class IndevoltCoordinator(DataUpdateCoordinator[dict[str, Any]]):
 
         # Cache device information
         device_data = config_data.get("device", {})
-
         self.firmware_version = device_data.get("fw")
+        raw_mac = device_data.get("mac")
+        self.mac_address = format_mac(raw_mac) if raw_mac else None
 
     async def _async_update_data(self) -> dict[str, Any]:
         """Fetch raw JSON data from the device."""
diff --git a/homeassistant/components/indevolt/diagnostics.py b/homeassistant/components/indevolt/diagnostics.py
index 8047701c8b7f..c2de67fb5730 100644
--- a/homeassistant/components/indevolt/diagnostics.py
+++ b/homeassistant/components/indevolt/diagnostics.py
@@ -25,6 +25,12 @@ TO_REDACT = {
 }
 
 
+def _redact_mac(mac_address: str) -> str:
+    """Redact the device-specific part of a MAC address (keep OUI, used for discovery)."""
+    parts = mac_address.split(":")
+    return ":".join([*parts[:3], "XX", "XX", "XX"])
+
+
 async def async_get_config_entry_diagnostics(
     hass: HomeAssistant, entry: IndevoltConfigEntry
 ) -> dict[str, Any]:
@@ -36,6 +42,9 @@ async def async_get_config_entry_diagnostics(
         "generation": coordinator.generation,
         "serial_number": coordinator.serial_number,
         "firmware_version": coordinator.firmware_version,
+        "mac_address": _redact_mac(coordinator.mac_address)
+        if coordinator.mac_address
+        else None,
     }
 
     return {
diff --git a/homeassistant/components/indevolt/entity.py b/homeassistant/components/indevolt/entity.py
index da87036a33a3..de4b5a209c8d 100644
--- a/homeassistant/components/indevolt/entity.py
+++ b/homeassistant/components/indevolt/entity.py
@@ -1,6 +1,6 @@
 """Base entity for Indevolt integration."""
 
-from homeassistant.helpers.device_registry import DeviceInfo
+from homeassistant.helpers.device_registry import CONNECTION_NETWORK_MAC, DeviceInfo
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
 from .const import DOMAIN
@@ -21,8 +21,12 @@ class IndevoltEntity(CoordinatorEntity[IndevoltCoordinator]):
     def device_info(self) -> DeviceInfo:
         """Return device information for registry."""
         coordinator = self.coordinator
+        connections: set[tuple[str, str]] = set()
+        if coordinator.mac_address:
+            connections.add((CONNECTION_NETWORK_MAC, coordinator.mac_address))
         return DeviceInfo(
             identifiers={(DOMAIN, coordinator.serial_number)},
+            connections=connections,
             manufacturer="INDEVOLT",
             serial_number=coordinator.serial_number,
             model=coordinator.device_model,
diff --git a/tests/components/indevolt/conftest.py b/tests/components/indevolt/conftest.py
index e91fe6c963a9..11a0fac750e7 100644
--- a/tests/components/indevolt/conftest.py
+++ b/tests/components/indevolt/conftest.py
@@ -19,21 +19,26 @@ ALT_TEST_HOST = "192.168.1.101"
 TEST_PORT = 8080
 TEST_DEVICE_SN_GEN1 = "BK1600-12345678"
 TEST_DEVICE_SN_GEN2 = "SolidFlex2000-87654321"
-TEST_FW_VERSION = "1.2.3"
+TEST_MODEL_GEN1 = "BK1600"
+TEST_MODEL_GEN2 = "CMS-SF2000"
 
-# Map device fixture names to generation and fixture files
+# Create DeviceInfo per generation
 DEVICE_MAPPING = {
     1: {
-        "device": "BK1600",
+        "device": TEST_MODEL_GEN1,
         "generation": 1,
         "sn": TEST_DEVICE_SN_GEN1,
         "host": ALT_TEST_HOST,
+        "mac": "aa:bb:cc:11:22:33",
+        "fw": "1.2.3",
     },
     2: {
-        "device": "CMS-SF2000",
+        "device": TEST_MODEL_GEN2,
         "generation": 2,
         "sn": TEST_DEVICE_SN_GEN2,
         "host": TEST_HOST,
+        "mac": "aa:bb:cc:44:55:66",
+        "fw": "1.2.3",
     },
 }
 
@@ -121,7 +126,8 @@ def mock_indevolt(generation: int) -> Generator[AsyncMock]:
                 "sn": device_info["sn"],
                 "type": device_info["device"],
                 "generation": device_info["generation"],
-                "fw": TEST_FW_VERSION,
+                "fw": device_info["fw"],
+                "mac": device_info["mac"],
             }
         }
 
diff --git a/tests/components/indevolt/snapshots/test_diagnostics.ambr b/tests/components/indevolt/snapshots/test_diagnostics.ambr
index 0df488c530db..28e91d6d6b1a 100644
--- a/tests/components/indevolt/snapshots/test_diagnostics.ambr
+++ b/tests/components/indevolt/snapshots/test_diagnostics.ambr
@@ -39,6 +39,7 @@
     'device': dict({
       'firmware_version': '1.2.3',
       'generation': 1,
+      'mac_address': 'aa:bb:cc:XX:XX:XX',
       'model': 'BK1600',
       'serial_number': '**REDACTED**',
     }),
@@ -137,6 +138,7 @@
     'device': dict({
       'firmware_version': '1.2.3',
       'generation': 2,
+      'mac_address': 'aa:bb:cc:XX:XX:XX',
       'model': 'CMS-SF2000',
       'serial_number': '**REDACTED**',
     }),
diff --git a/tests/components/indevolt/test_init.py b/tests/components/indevolt/test_init.py
index e39f8e479e97..3f495e6d99ae 100644
--- a/tests/components/indevolt/test_init.py
+++ b/tests/components/indevolt/test_init.py
@@ -6,8 +6,11 @@ import pytest
 
 from homeassistant.config_entries import ConfigEntryState
 from homeassistant.core import HomeAssistant
+from homeassistant.helpers import device_registry as dr
+from homeassistant.helpers.device_registry import CONNECTION_NETWORK_MAC
 
 from . import setup_integration
+from .conftest import DEVICE_MAPPING
 
 from tests.common import MockConfigEntry
 
@@ -30,6 +33,31 @@ async def test_load_unload(
     assert mock_config_entry.state is ConfigEntryState.NOT_LOADED
 
 
+@pytest.mark.parametrize("generation", [1, 2], indirect=True)
+async def test_device_info(
+    hass: HomeAssistant,
+    mock_indevolt: AsyncMock,
+    mock_config_entry: MockConfigEntry,
+    generation: int,
+    device_registry: dr.DeviceRegistry,
+) -> None:
+    """Test that device info is correctly registered in the device registry."""
+    await setup_integration(hass, mock_config_entry)
+
+    device_info = DEVICE_MAPPING[generation]
+    device_entry = device_registry.async_get_device(
+        connections={(CONNECTION_NETWORK_MAC, device_info["mac"])}
+    )
+
+    assert device_entry is not None
+    assert device_entry.manufacturer == "INDEVOLT"
+    assert device_entry.model == device_info["device"]
+    assert device_entry.serial_number == device_info["sn"]
+    assert device_entry.sw_version == device_info["fw"]
+    assert device_entry.hw_version == str(device_info["generation"])
+    assert (CONNECTION_NETWORK_MAC, device_info["mac"]) in device_entry.connections
+
+
 @pytest.mark.parametrize("generation", [2], indirect=True)
 async def test_load_failure(
     hass: HomeAssistant, mock_indevolt: AsyncMock, mock_config_entry: MockConfigEntry