diff --git a/app/tests/test_config.py b/app/tests/test_config.py
index aa0cd52..b97a4e8 100644
--- a/app/tests/test_config.py
+++ b/app/tests/test_config.py
@@ -152,6 +152,16 @@ def ConfigComplete():
                                  'pv4': {'manufacturer': 'man4',
                                          'type': 'type4'},
                                  'suggested_area': 'Garage2',
+                                 'sensor_list': 688},
+            'Y170000000000002': {'modbus_polling': False,
+                                 'modbus_scanning': {
+                                    'bytes': 16,
+                                    'start': 2048,
+                                    'step': 1024
+                                 },
+                                 'monitor_sn': 2000000001,
+                                 'node_id': 'PV-Garage3/',
+                                 'suggested_area': 'Garage3',
                                  'sensor_list': 688}
         },
         'batteries': {
@@ -224,8 +234,9 @@ def test_full_config(ConfigComplete):
            },
            'inverters': {'allow_all': False, 
                          'R170000000000001': {'modbus_polling': False, 'node_id': 'PV-Garage/', 'sensor_list': 0x02B0, 'suggested_area': 'Garage', 'pv1': {'type': 'type1', 'manufacturer': 'man1'}, 'pv2': {'type': 'type2', 'manufacturer': 'man2'}}, 
-                         'Y170000000000001': {'modbus_polling': True, 'monitor_sn': 2000000000, 'node_id': 'PV-Garage2/', 'sensor_list': 0x02B0, 'suggested_area': 'Garage2', 'pv1': {'type': 'type1', 'manufacturer': 'man1'}, 'pv2': {'type': 'type2', 'manufacturer': 'man2'}, 'pv3': {'type': 'type3', 'manufacturer': 'man3'}, 'pv4': {'type': 'type4', 'manufacturer': 'man4'}}
-            }
+                         'Y170000000000001': {'modbus_polling': True, 'monitor_sn': 2000000000, 'node_id': 'PV-Garage2/', 'sensor_list': 0x02B0, 'suggested_area': 'Garage2', 'pv1': {'type': 'type1', 'manufacturer': 'man1'}, 'pv2': {'type': 'type2', 'manufacturer': 'man2'}, 'pv3': {'type': 'type3', 'manufacturer': 'man3'}, 'pv4': {'type': 'type4', 'manufacturer': 'man4'}},
+                         'Y170000000000002': {'modbus_polling': False, 'monitor_sn': 2000000001, 'node_id': 'PV-Garage3/', 'sensor_list': 0x02B0, 'suggested_area': 'Garage3', 'modbus_scanning': {'start': 2048, 'step': 1024, 'bytes': 16}}
+           }
     }
     try:
         validated = Config.conf_schema.validate(cnf)
diff --git a/app/tests/test_config_read_json.py b/app/tests/test_config_read_json.py
index 647885a..68c5b60 100644
--- a/app/tests/test_config_read_json.py
+++ b/app/tests/test_config_read_json.py
@@ -380,6 +380,15 @@ def test_full_config(ConfigComplete):
        "pv4.manufacturer": "man4",
        "pv4.type": "type4",
        "sensor_list": 688
+     },
+     {
+       "serial": "Y170000000000002",
+       "monitor_sn": 2000000001,
+       "modbus_polling": false,
+       "modbus_scanning.start": 2048,
+       "node_id": "PV-Garage3",
+       "suggested_area": "Garage3",
+       "sensor_list": 688
      }
    ],
    "batteries": [
diff --git a/ha_addons/templates/config.jinja b/ha_addons/templates/config.jinja
index f17a758..796d0c2 100755
--- a/ha_addons/templates/config.jinja
+++ b/ha_addons/templates/config.jinja
@@ -40,6 +40,9 @@ schema:
       client_mode.host: match(\b((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])\.){3}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])\b)?
       client_mode.port: port?
       client_mode.forward: bool?
+      modbus_scanning.start: int(0,65535)?
+      modbus_scanning.step: int(0,65535)?
+      modbus_scanning.bytes: int(1,80)?
       pv1.manufacturer: str?
       pv1.type: str?
       pv2.manufacturer: str?