diff --git a/homeassistant/components/kostal_plenticore/config_flow.py b/homeassistant/components/kostal_plenticore/config_flow.py
index cbbaeefd85d..ba8e762763d 100644
--- a/homeassistant/components/kostal_plenticore/config_flow.py
+++ b/homeassistant/components/kostal_plenticore/config_flow.py
@@ -12,6 +12,7 @@ from homeassistant.core import HomeAssistant
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 
 from .const import DOMAIN
+from .helper import get_hostname_id
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -32,9 +33,10 @@ async def test_connection(hass: HomeAssistant, data) -> str:
     session = async_get_clientsession(hass)
     async with ApiClient(session, data["host"]) as client:
         await client.login(data["password"])
-        values = await client.get_setting_values("scb:network", "Hostname")
+        hostname_id = await get_hostname_id(client)
+        values = await client.get_setting_values("scb:network", hostname_id)
 
-    return values["scb:network"]["Hostname"]
+    return values["scb:network"][hostname_id]
 
 
 class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
diff --git a/homeassistant/components/kostal_plenticore/helper.py b/homeassistant/components/kostal_plenticore/helper.py
index cb43486dbe0..47ddf2d04d4 100644
--- a/homeassistant/components/kostal_plenticore/helper.py
+++ b/homeassistant/components/kostal_plenticore/helper.py
@@ -23,6 +23,7 @@ from .const import DOMAIN
 
 _LOGGER = logging.getLogger(__name__)
 _DataT = TypeVar("_DataT")
+KNOWN_HOSTNAME_IDS = ("Network:Hostname", "Hostname")
 
 
 class Plenticore:
@@ -69,6 +70,7 @@ class Plenticore:
         )
 
         # get some device meta data
+        hostname_id = await get_hostname_id(self._client)
         settings = await self._client.get_setting_values(
             {
                 "devices:local": [
@@ -78,7 +80,7 @@ class Plenticore:
                     "Properties:VersionIOC",
                     "Properties:VersionMC",
                 ],
-                "scb:network": ["Hostname"],
+                "scb:network": [hostname_id],
             }
         )
 
@@ -91,7 +93,7 @@ class Plenticore:
             identifiers={(DOMAIN, device_local["Properties:SerialNo"])},
             manufacturer="Kostal",
             model=f"{prod1} {prod2}",
-            name=settings["scb:network"]["Hostname"],
+            name=settings["scb:network"][hostname_id],
             sw_version=f'IOC: {device_local["Properties:VersionIOC"]}'
             + f' MC: {device_local["Properties:VersionMC"]}',
         )
@@ -403,3 +405,12 @@ class PlenticoreDataFormatter:
             return state
 
         return PlenticoreDataFormatter.EM_STATES.get(value)
+
+
+async def get_hostname_id(client: ApiClient) -> str:
+    """Check for known existing hostname ids."""
+    all_settings = await client.get_settings()
+    for entry in all_settings["scb:network"]:
+        if entry.id in KNOWN_HOSTNAME_IDS:
+            return entry.id
+    raise ApiException("Hostname identifier not found in KNOWN_HOSTNAME_IDS")