Bump huawei-solar to 2.1.0a3

manifest.json

@@ -4,8 +4,8 @@
   "config_flow": true,
   "documentation": "https://www.home-assistant.io/integrations/huawei_solar",
   "issue_tracker": "https://github.com/wlcrs/huawei_solar/issues",
-  "requirements": ["huawei-solar==2.1.0a2"],
+  "requirements": ["huawei-solar==2.1.0a3"],
   "codeowners": ["@wlcrs"],
   "iot_class": "local_polling",
-  "version": "1.1.0a2"
+  "version": "1.1.0a3"
 }

sensor.py

@@ -759,12 +759,23 @@ def __init__(
         self._attr_device_info = device_info
         self._attr_unique_id = f"{device_info['name']}_{description.key}"
 
+    @property
+    def available(self) -> bool:
+        """Report if sensor is available"""
+
+        # Check whether optimizer is listed in coordinator data
+        return super().available and self.optimizer_id in self.coordinator.data
+
     @property
     def native_value(self):
         """Native sensor value."""
-        return getattr(
-            self.coordinator.data[self.optimizer_id], self.entity_description.key
-        )
+        if self.optimizer_id in self.coordinator.data:
+            return getattr(
+                self.coordinator.data[self.optimizer_id], self.entity_description.key
+            )
+
+        else:
+            return None
 
 
 def get_pv_entity_descriptions(count: int) -> list[HuaweiSolarSensorEntityDescription]: