diff --git a/custom_components/solarweb/const.py b/custom_components/solarweb/const.py
index b373a6b..e9ee22f 100644
--- a/custom_components/solarweb/const.py
+++ b/custom_components/solarweb/const.py
@@ -64,7 +64,7 @@
         "precision": 2,
         "icon": "mdi:cash-multiple",
     },
-    "Percent": {
+    "Percentage": {
         "device": SensorDeviceClass.BATTERY,
         "state": SensorStateClass.MEASUREMENT,
         "precision": 1,
diff --git a/custom_components/solarweb/sensor.py b/custom_components/solarweb/sensor.py
index 0383df3..2789bf4 100644
--- a/custom_components/solarweb/sensor.py
+++ b/custom_components/solarweb/sensor.py
@@ -65,7 +65,7 @@ def native_value(self):
     def native_precision(self):
         """Return the native measurement precision."""
         value = self.coordinator.data["data"]["sensors"][self._attr_name]["channelType"]
-        if value:
+        if value and value in CHANNEL_HA_MAP:
             return CHANNEL_HA_MAP.get(value).get("precision")
         else:
             return None
@@ -74,7 +74,7 @@ def native_precision(self):
     def state_class(self):
         """Return the state class."""
         value = self.coordinator.data["data"]["sensors"][self._attr_name]["channelType"]
-        if value:
+        if value and value in CHANNEL_HA_MAP:
             return CHANNEL_HA_MAP.get(value).get("state")
         else:
             return None
@@ -83,7 +83,7 @@ def state_class(self):
     def device_class(self):
         """Return the device class."""
         value = self.coordinator.data["data"]["sensors"][self._attr_name]["channelType"]
-        if value:
+        if value and value in CHANNEL_HA_MAP:
             return CHANNEL_HA_MAP.get(value).get("device")
         else:
             return None
@@ -92,7 +92,7 @@ def device_class(self):
     def icon(self):
         """Return the state class."""
         value = self.coordinator.data["data"]["sensors"][self._attr_name]["channelType"]
-        if value:
+        if value and value in CHANNEL_HA_MAP:
             return CHANNEL_HA_MAP.get(value).get("icon")
         else:
             return None