diff --git a/myems-api/reports/storesaving.py b/myems-api/reports/storesaving.py
index d1ae1b33..edac5b5d 100644
--- a/myems-api/reports/storesaving.py
+++ b/myems-api/reports/storesaving.py
@@ -5,6 +5,7 @@ import config
 from datetime import datetime, timedelta, timezone
 from core import utilities
 from decimal import Decimal
+import excelexporters.storesaving
 
 
 class Reporting:
@@ -676,4 +677,11 @@ class Reporting:
             "values": parameters_data['values']
         }
 
+        # export result to Excel file and then encode the file to base64 string
+        result['excel_bytes_base64'] = excelexporters.storesaving.export(result,
+                                                                         store['name'],
+                                                                         reporting_start_datetime_local,
+                                                                         reporting_end_datetime_local,
+                                                                         period_type)
+
         resp.body = json.dumps(result)