diff --git a/srnemqtt/consumers/mqtt.py b/srnemqtt/consumers/mqtt.py
index 51d26b1..6600db3 100644
--- a/srnemqtt/consumers/mqtt.py
+++ b/srnemqtt/consumers/mqtt.py
@@ -116,28 +116,37 @@ PayloadType: TypeAlias = str | bytes | bytearray | int | float | None
 
 
 class MqttConsumer(BaseConsumer):
-    client: mqtt.Client
     initialized: List[str]
 
+    _client: mqtt.Client | None = None
+
     def __init__(self, settings: Dict[str, Any]) -> None:
         self.initialized = []
 
         super().__init__(settings)
-        self.client = mqtt.Client(client_id=settings["client"]["id"], userdata=self)
-        self.client.on_connect = self.on_connect
-        self.client.on_message = self.on_message
-        self.client.on_disconnect = self.on_disconnect
-        self.client.on_connect_fail = self.on_connect_fail
+
+    @property
+    def client(self) -> mqtt.Client:
+        if self._client is not None:
+            return self._client
+
+        self._client = mqtt.Client(
+            client_id=self.settings["client"]["id"], userdata=self
+        )
+        self._client.on_connect = self.on_connect
+        self._client.on_message = self.on_message
+        self._client.on_disconnect = self.on_disconnect
+        self._client.on_connect_fail = self.on_connect_fail
         # Will must be set before connecting!!
-        self.client.will_set(
+        self._client.will_set(
             f"{self.topic_prefix}/available", payload="offline", retain=True
         )
         while True:
             try:
-                self.client.connect(
-                    settings["client"]["host"],
-                    settings["client"]["port"],
-                    settings["client"]["keepalive"],
+                self._client.connect(
+                    self.settings["client"]["host"],
+                    self.settings["client"]["port"],
+                    self.settings["client"]["keepalive"],
                 )
                 break
             except OSError as err:
@@ -151,6 +160,7 @@ class MqttConsumer(BaseConsumer):
                     raise
                 print(err)
                 sleep(0.1)
+        return self._client
 
     def config(self, settings: Dict[str, Any]):
         super().config(settings)
@@ -167,9 +177,19 @@ class MqttConsumer(BaseConsumer):
 
         settings.setdefault("discovery_prefix", "homeassistant")
 
+    _controller_id: str | None = None
+
+    @property
+    def controller_id(self) -> str:
+        assert self.controller is not None
+        # Controller serial is fetched from device, cache it.
+        if self._controller_id is None:
+            self._controller_id = self.controller.serial
+        return f"{self.controller.manufacturer_id}_{self._controller_id}"
+
     @property
     def topic_prefix(self):
-        return f"{self.settings['prefix']}/{self.settings['device_id']}"
+        return f"{self.settings['prefix']}/{self.controller_id}"
 
     def get_ha_config(
         self,
@@ -181,21 +201,25 @@ class MqttConsumer(BaseConsumer):
         state_class: Optional[str] = None,
     ):
         assert state_class in [None, "measurement", "total", "total_increasing"]
+        assert self.controller is not None
 
         res = {
             "~": f"{self.topic_prefix}",
-            "unique_id": f"{self.settings['device_id']}_{id}",
+            "unique_id": f"{self.controller_id}_{id}",
+            "object_id": f"{self.controller_id}_{id}",
             "availability_topic": "~/available",
             "state_topic": f"~/{id}",
             "name": name,
             "device": {
                 "identifiers": [
-                    self.settings["device_id"],
+                    self.controller_id,
                 ],
-                # TODO: Get charger serial and use for identifier instead
-                # See: https://www.home-assistant.io/integrations/sensor.mqtt/#device
-                # "via_device": self.settings["device_id"],
+                "manufacturer": self.controller.manufacturer,
+                "model": self.controller.model,
+                "hw_version": self.controller.version,
+                "via_device": self.settings["device_id"],
                 "suggested_area": "Solar panel",
+                "name": self.controller.name,
             },
             "force_update": True,
             "expire_after": expiry,
@@ -253,22 +277,25 @@ class MqttConsumer(BaseConsumer):
     def write(self, data: Dict[str, PayloadType]):
         self.client.publish(f"{self.topic_prefix}/raw", payload=json.dumps(data))
 
-        for k, v in data.items():
-            if k in MAP_VALUES:
-                if k not in self.initialized:
-                    km = MAP_VALUES[DataName(k)]
-                    pretty_name = k.replace("_", " ").capitalize()
+        for dataname, data_value in data.items():
+            if dataname in MAP_VALUES:
+                if dataname not in self.initialized:
+                    km = MAP_VALUES[DataName(dataname)]
+                    pretty_name = dataname.replace("_", " ").capitalize()
                     disc_prefix = self.settings["discovery_prefix"]
-                    device_id = self.settings["device_id"]
 
                     self.client.publish(
-                        f"{disc_prefix}/sensor/{device_id}_{k}/config",
-                        payload=json.dumps(self.get_ha_config(k, pretty_name, **km)),
+                        f"{disc_prefix}/sensor/{self.controller_id}/{dataname}/config",
+                        payload=json.dumps(
+                            self.get_ha_config(dataname, pretty_name, **km)
+                        ),
                         retain=True,
                     )
-                    self.initialized.append(k)
+                    self.initialized.append(dataname)
 
-                self.client.publish(f"{self.topic_prefix}/{k}", v, retain=True)
+                self.client.publish(
+                    f"{self.topic_prefix}/{dataname}", data_value, retain=True
+                )
 
     def exit(self):
         self.client.publish(