diff --git a/src/upload/admin/model/extension/retailcrm/inventories.php b/src/upload/admin/model/extension/retailcrm/inventories.php
new file mode 100644
index 0000000..d8fd818
--- /dev/null
+++ b/src/upload/admin/model/extension/retailcrm/inventories.php
@@ -0,0 +1,42 @@
+<?php
+
+class ModelExtensionRetailcrmInventories extends Model {
+
+    public function uploadInventories()
+    {
+        $this->load->model('setting/setting');
+        
+        $module_setting = $this->model_setting_setting->getSetting('module_retailcrm');
+        $uploadType = $module_setting['module_retailcrm_stock_upload'];
+        $store = $module_setting['module_retailcrm_store_select'];
+
+        if ($uploadType === '1') {
+            $this->toCrmUpload($store);
+        }
+    }
+
+    public function toCrmUpload($store) {
+        $products = $this->model_catalog_product->getProducts([]);
+        $offers = [];
+
+        foreach ($products as $product) {
+           $offers[] = [
+               'externalId' => $product['product_id'],
+               'stores' => [['code' => $store, 'available' => $product['quantity']]]
+            ]; 
+        }
+
+        $packs = array_chunk($offers, 50);
+
+        foreach ($packs as $pack) {
+           $this->sendToCrm($pack);
+        }
+   }
+
+   public function sendToCrm($pack) {
+       $inventory_manager = $this->retailcrm->getInventoryManager(); 
+      
+       return $inventory_manager->storeInventoriesUpload($pack);
+   }
+}
+
diff --git a/src/upload/system/library/retailcrm/lib/service/InventoryManager.php b/src/upload/system/library/retailcrm/lib/service/InventoryManager.php
new file mode 100644
index 0000000..1654cc4
--- /dev/null
+++ b/src/upload/system/library/retailcrm/lib/service/InventoryManager.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace retailcrm\service;
+
+class InventoryManager 
+{
+    private $api;
+
+    public function __construct(\RetailcrmProxy $api) {
+        $this->api = $api;
+    }
+
+    public function storeInventoriesUpload($pack) {
+       return  $this->api->storeInventoriesUpload($pack);
+    }
+}
diff --git a/src/upload/system/library/retailcrm/retailcrm.php b/src/upload/system/library/retailcrm/retailcrm.php
index c4ce323..7ecb0d4 100644
--- a/src/upload/system/library/retailcrm/retailcrm.php
+++ b/src/upload/system/library/retailcrm/retailcrm.php
@@ -9,6 +9,7 @@ use retailcrm\service\OrderManager;
 use retailcrm\factory\OrderConverterFactory;
 use retailcrm\factory\CustomerConverterFactory;
 use retailcrm\service\SettingsManager;
+use retailcrm\service\InventoryManager;
 
 require_once DIR_SYSTEM . 'library/retailcrm/bootstrap.php';
 
@@ -54,6 +55,10 @@ class Retailcrm {
         return new CorporateCustomer($this->getApiClient(), new CustomerRepository($this->registry));
     }
 
+    public function getInventoryManager() {
+        return new InventoryManager($this->getApiClient());
+    }
+
     /**
      * Get api client object
      *
diff --git a/tests/admin/ModelRetailcrmInventoryAdminTest.php b/tests/admin/ModelRetailcrmInventoryAdminTest.php
new file mode 100644
index 0000000..5b14eed
--- /dev/null
+++ b/tests/admin/ModelRetailcrmInventoryAdminTest.php
@@ -0,0 +1,37 @@
+<?php
+
+require_once __DIR__ . '/../' . getenv('TEST_SUITE') . '/TestCase.php';
+
+class ModelRetailcrmInventoryAdminTest extends TestCase
+{
+    private $inventoriesModel;
+    private $apiClientMock;
+
+    public function setUp()
+    {
+        parent::setUp();
+
+        $this->inventoriesModel = $this->loadModel('extension/retailcrm/inventories');
+
+        $this->apiClientMock = $this->getMockBuilder(\RetailcrmProxy::class)
+            ->disableOriginalConstructor()
+            ->setMethods(array(
+                'storeInventoriesUpload',
+            ))
+            ->getMock();
+
+        self::$registry->set(\RetailcrmProxy::class, $this->apiClientMock);
+    }
+
+    public function testUploadToCrm()
+    {
+        $productModel = $this->loadModel('catalog/product');
+        $product = $productModel->getProducts([]);
+        $productSend = $this->inventoriesModel->uploadToCrm($product, $this->apiClientMock);
+        $product= $productSend[0][0];
+
+        $this->assertInternalType('array', $productSend);
+        $this->assertArrayHasKey('externalId', $product);
+        $this->assertArrayHasKey('stores', $product);
+    }
+}