diff --git a/homewizard_energy/v1/__init__.py b/homewizard_energy/v1/__init__.py
index 807dcfc..3147e4f 100644
--- a/homewizard_energy/v1/__init__.py
+++ b/homewizard_energy/v1/__init__.py
@@ -96,7 +96,7 @@ async def state(
     ) -> State:
         """Return or update the state object."""
 
-        if self._device is not None and self._device.supports_state is False:
+        if self._device is not None and self._device.supports_state() is False:
             raise UnsupportedError("State is not supported")
 
         if power_on is not None or switch_lock is not None or brightness is not None:
@@ -119,7 +119,7 @@ async def identify(
     ) -> bool:
         """Send identify request."""
 
-        if self._device is not None and self._device.supports_state is False:
+        if self._device is not None and self._device.supports_identify() is False:
             raise UnsupportedError("State is not supported")
 
         await self._request("api/v1/identify", method=METH_PUT)
diff --git a/tests/v1/test_v1_homewizard_energy.py b/tests/v1/test_v1_homewizard_energy.py
index 123caa8..3914900 100644
--- a/tests/v1/test_v1_homewizard_energy.py
+++ b/tests/v1/test_v1_homewizard_energy.py
@@ -595,6 +595,42 @@ async def test_state_set(
             await api.close()
 
 
+@pytest.mark.parametrize(
+    "model",
+    [
+        "HWE-P1",
+        "HWE-WTR",
+        "HWE-KWH1",
+        "HWE-KWH3",
+        "SDM230-wifi",
+        "SDM630-wifi",
+    ],
+)
+async def test_state_not_supported_with_cached_device(aresponses, model: str):
+    """Test state set uses cached device to check is unsupported."""
+
+    aresponses.add(
+        "example.com",
+        "/api",
+        "GET",
+        aresponses.Response(
+            text=load_fixtures(f"{model}/device.json"),
+            status=200,
+            headers={"Content-Type": "application/json; charset=utf-8"},
+        ),
+    )
+
+    async with aiohttp.ClientSession() as session:
+        api = HomeWizardEnergyV1("example.com", clientsession=session)
+
+        await api.device()
+
+        with pytest.raises(UnsupportedError):
+            await api.state()
+
+        await api.close()
+
+
 @pytest.mark.parametrize(
     "model",
     [
@@ -670,6 +706,40 @@ async def test_identify_not_supported(model: str, aresponses):
         await api.close()
 
 
+@pytest.mark.parametrize(
+    "model",
+    [
+        "HWE-KWH1",
+        "HWE-KWH3",
+        "SDM230-wifi",
+        "SDM630-wifi",
+    ],
+)
+async def test_identify_not_supported_with_cached_device(aresponses, model: str):
+    """Test identify set uses cached device to check is unsupported."""
+
+    aresponses.add(
+        "example.com",
+        "/api",
+        "GET",
+        aresponses.Response(
+            text=load_fixtures(f"{model}/device.json"),
+            status=200,
+            headers={"Content-Type": "application/json; charset=utf-8"},
+        ),
+    )
+
+    async with aiohttp.ClientSession() as session:
+        api = HomeWizardEnergyV1("example.com", clientsession=session)
+
+        await api.device()
+
+        with pytest.raises(UnsupportedError):
+            await api.identify()
+
+        await api.close()
+
+
 async def test_get_system_object(aresponses):
     """Test fetches system object and device object when unknown."""