diff --git a/myproject/inventory/services/batch_manager.py b/myproject/inventory/services/batch_manager.py
index d44d877..e7ac228 100644
--- a/myproject/inventory/services/batch_manager.py
+++ b/myproject/inventory/services/batch_manager.py
@@ -115,14 +115,14 @@ class StockBatchManager:
                 status='reserved',
                 transformation_input__transformation=exclude_transformation
             )
-            transformation_reserved_qty = transformation_reservations.aggregate(total=Sum('quantity'))['total'] or Decimal('0')
+            transformation_reserved_qty = transformation_reservations.aggregate(total=Sum('quantity_base'))['total'] or Decimal('0')
             # Исключаем резервы трансформации из общего расчета резервов
             reservation_filter = reservation_filter.exclude(transformation_input__transformation=exclude_transformation)
         
         if exclude_order:
             reservation_filter = reservation_filter.exclude(order_item__order=exclude_order)
 
-        total_reserved = reservation_filter.aggregate(total=Sum('quantity'))['total'] or Decimal('0')
+        total_reserved = reservation_filter.aggregate(total=Sum('quantity_base'))['total'] or Decimal('0')
 
         # Получаем партии по FIFO
         batches = StockBatchManager.get_batches_for_fifo(product, warehouse)
diff --git a/myproject/inventory/services/showcase_manager.py b/myproject/inventory/services/showcase_manager.py
index 96d0726..7de836d 100644
--- a/myproject/inventory/services/showcase_manager.py
+++ b/myproject/inventory/services/showcase_manager.py
@@ -401,7 +401,8 @@ class ShowcaseManager:
                 )
                 if not created:
                     reservation.quantity = (reservation.quantity or Decimal('0')) + quantity_per_item
-                    reservation.save(update_fields=['quantity'])
+                    reservation.quantity_base = (reservation.quantity_base or Decimal('0')) + quantity_per_item
+                    reservation.save(update_fields=['quantity', 'quantity_base'])
 
         return {
             'success': True,
@@ -479,7 +480,8 @@ class ShowcaseManager:
 
                 if new_qty > 0:
                     res.quantity = new_qty
-                    res.save(update_fields=['quantity'])
+                    res.quantity_base = new_qty
+                    res.save(update_fields=['quantity', 'quantity_base'])
                     released_amount = quantity_per_item
                 else:
                     # Полностью освобождаем резерв
diff --git a/myproject/inventory/services/transformation_service.py b/myproject/inventory/services/transformation_service.py
index 7a4da46..d12a27f 100644
--- a/myproject/inventory/services/transformation_service.py
+++ b/myproject/inventory/services/transformation_service.py
@@ -251,7 +251,7 @@ class TransformationService:
                 status='reserved'
             ).exclude(
                 transformation_input__transformation=transformation
-            ).aggregate(total=models.Sum('quantity'))['total'] or Decimal('0')
+            ).aggregate(total=models.Sum('quantity_base'))['total'] or Decimal('0')
 
             available = stock.quantity_available - reserved_qty
             if trans_input.quantity > available:
diff --git a/myproject/inventory/services/writeoff_document_service.py b/myproject/inventory/services/writeoff_document_service.py
index 201fc6e..854738d 100644
--- a/myproject/inventory/services/writeoff_document_service.py
+++ b/myproject/inventory/services/writeoff_document_service.py
@@ -173,7 +173,8 @@ class WriteOffDocumentService:
                 # Обновляем резерв
                 if item.reservation:
                     item.reservation.quantity = quantity
-                    item.reservation.save(update_fields=['quantity'])
+                    item.reservation.quantity_base = quantity
+                    item.reservation.save(update_fields=['quantity', 'quantity_base'])
 
                 item.quantity = quantity
 
diff --git a/myproject/inventory/signals.py b/myproject/inventory/signals.py
index 8bf8a31..2cb3776 100644
--- a/myproject/inventory/signals.py
+++ b/myproject/inventory/signals.py
@@ -1078,11 +1078,16 @@ def update_reservation_on_item_change(sender, instance, created, **kwargs):
             # Обычный товар - один резерв, обновляем количество напрямую
             reservation = reservations.first()
             old_quantity = reservation.quantity
+            
+            # Обновляем quantity и quantity_base
             reservation.quantity = Decimal(str(instance.quantity))
-            reservation.save(update_fields=['quantity'])
+            reservation.quantity_base = instance.quantity_in_base_units or Decimal(str(instance.quantity))
+            reservation.sales_unit = instance.sales_unit
+            reservation.save(update_fields=['quantity', 'quantity_base', 'sales_unit'])
 
             logger.info(
-                f"✓ Резерв #{reservation.id} обновлён: quantity {old_quantity} → {reservation.quantity} "
+                f"✓ Резерв #{reservation.id} обновлён: quantity {old_quantity} → {reservation.quantity}, "
+                f"quantity_base → {reservation.quantity_base} "
                 f"(статус: {reservation.status}, OrderItem #{instance.id}, заказ {instance.order.order_number})"
             )
 
@@ -1104,8 +1109,10 @@ def update_reservation_on_item_change(sender, instance, created, **kwargs):
                 expected_qty = product_quantities.get(reservation.product_id, Decimal('0'))
                 if expected_qty > 0:
                     old_quantity = reservation.quantity
+                    # Компоненты комплекта всегда в базовых единицах
                     reservation.quantity = expected_qty
-                    reservation.save(update_fields=['quantity'])
+                    reservation.quantity_base = expected_qty
+                    reservation.save(update_fields=['quantity', 'quantity_base'])
 
                     logger.info(
                         f"✓ Резерв #{reservation.id} ({reservation.product.name}) обновлён: "