diff --git a/hub/app/adapters/store_api_adapter.py b/hub/app/adapters/store_api_adapter.py
index cd76be4..8ce4945 100644
--- a/hub/app/adapters/store_api_adapter.py
+++ b/hub/app/adapters/store_api_adapter.py
@@ -14,11 +14,30 @@ class StoreApiAdapter(StoreGateway):
         self.api_base_url = api_base_url
 
     def save_data(self, processed_agent_data_batch: List[ProcessedAgentData]):
-        """
-        Save the processed road data to the Store API.
-        Parameters:
-            processed_agent_data_batch (dict): Processed road data to be saved.
-        Returns:
-            bool: True if the data is successfully saved, False otherwise.
-        """
-        # Implement it
+        if not processed_agent_data_batch:
+            return False
+
+        # Extract user_id from the first element
+        user_id = processed_agent_data_batch[0].agent_data.user_id
+
+        payload = {
+            "data": [item.model_dump(mode='json') for item in processed_agent_data_batch],
+            "user_id": user_id
+        }
+
+        try:
+            # Perform a POST request to the Store API with a 10-second timeout
+            response = requests.post(
+                f"{self.api_base_url}/processed_agent_data/",
+                json=payload,
+                timeout=10
+            )
+            if response.status_code == 200:
+                logging.info(f"Batch of {len(processed_agent_data_batch)} items sent to Store.")
+                return True
+            else:
+                logging.error(f"Store API error: {response.status_code} - {response.text}")
+                return False
+        except Exception as e:
+            logging.error(f"Failed to send data to Store: {e}")
+            return False
diff --git a/hub/docker/docker-compose.yaml b/hub/docker/docker-compose.yaml
index 639dbd4..4964dda 100644
--- a/hub/docker/docker-compose.yaml
+++ b/hub/docker/docker-compose.yaml
@@ -93,7 +93,7 @@ services:
       MQTT_BROKER_HOST: "mqtt"
       MQTT_BROKER_PORT: 1883
       MQTT_TOPIC: "processed_data_topic"
-      BATCH_SIZE: 1
+      BATCH_SIZE: 20
     ports:
       - "9000:8000"
     networks:
diff --git a/hub/main.py b/hub/main.py
index 1c2c0e9..53544fa 100644
--- a/hub/main.py
+++ b/hub/main.py
@@ -70,18 +70,20 @@ def on_message(client, userdata, msg):
         processed_agent_data = ProcessedAgentData.model_validate_json(
             payload, strict=True
         )
-
         redis_client.lpush(
             "processed_agent_data", processed_agent_data.model_dump_json()
         )
-        processed_agent_data_batch: List[ProcessedAgentData] = []
+
         if redis_client.llen("processed_agent_data") >= BATCH_SIZE:
+            processed_agent_data_batch: List[ProcessedAgentData] = []
             for _ in range(BATCH_SIZE):
-                processed_agent_data = ProcessedAgentData.model_validate_json(
-                    redis_client.lpop("processed_agent_data")
-                )
-                processed_agent_data_batch.append(processed_agent_data)
-        store_adapter.save_data(processed_agent_data_batch=processed_agent_data_batch)
+                raw_data = redis_client.lpop("processed_agent_data")
+                if raw_data:
+                    data_item = ProcessedAgentData.model_validate_json(raw_data)
+                    processed_agent_data_batch.append(data_item)
+
+            store_adapter.save_data(processed_agent_data_batch=processed_agent_data_batch)
+
         return {"status": "ok"}
     except Exception as e:
         logging.info(f"Error processing MQTT message: {e}")