diff --git a/app/src/config.py b/app/src/cnf/config.py
similarity index 81%
rename from app/src/config.py
rename to app/src/cnf/config.py
index 3424bd9..ecbad0a 100644
--- a/app/src/config.py
+++ b/app/src/cnf/config.py
@@ -1,19 +1,23 @@
 '''Config module handles the proxy configuration in the config.toml file'''
 
-import shutil
 import tomllib
 import logging
+from abc import ABC, abstractmethod
 from schema import Schema, And, Or, Use, Optional
 
 
+class ConfigIfc(ABC):
+    @abstractmethod
+    def get_config(cls) -> dict:  # pragma: no cover
+        pass
+
+
 class Config():
     '''Static class Config is reads and sanitize the config.
 
     Read config.toml file and sanitize it with read().
     Get named parts of the config with get()'''
 
-    act_config = {}
-    def_config = {}
     conf_schema = Schema({
         'tsun': {
             'enabled': Use(bool),
@@ -93,38 +97,14 @@ class Config():
     )
 
     @classmethod
-    def class_init(cls) -> None | str:  # pragma: no cover
-        try:
-            # make the default config transparaent by copying it
-            # in the config.example file
-            logging.debug('Copy Default Config to config.example.toml')
-
-            shutil.copy2("default_config.toml",
-                         "config/config.example.toml")
-        except Exception:
-            pass
-        err_str = cls.read()
-        del cls.conf_schema
-        return err_str
+    def init(cls, ifc: ConfigIfc, path='') -> None | str:
+        cls.ifc = ifc
+        cls.act_config = {}
+        cls.def_config = {}
+        return cls.read(path)
 
     @classmethod
-    def _read_config_file(cls) -> dict:  # pragma: no cover
-        usr_config = {}
-
-        try:
-            with open("config/config.toml", "rb") as f:
-                usr_config = tomllib.load(f)
-        except Exception as error:
-            err = f'Config.read: {error}'
-            logging.error(err)
-            logging.info(
-                '\n  To create the missing config.toml file, '
-                'you can rename the template config.example.toml\n'
-                '  and customize it for your scenario.\n')
-        return usr_config
-
-    @classmethod
-    def read(cls, path='') -> None | str:
+    def read(cls, path) -> None | str:
         '''Read config file, merge it with the default config
         and sanitize the result'''
         err = None
@@ -140,7 +120,7 @@ class Config():
 
             # overwrite the default values, with values from
             # the config.toml file
-            usr_config = cls._read_config_file()
+            usr_config = cls.ifc.get_config()
 
             # merge the default and the user config
             config = def_config.copy()
diff --git a/app/src/cnf/config_ifc_proxy.py b/app/src/cnf/config_ifc_proxy.py
new file mode 100644
index 0000000..cf2f022
--- /dev/null
+++ b/app/src/cnf/config_ifc_proxy.py
@@ -0,0 +1,34 @@
+'''Config module handles the proxy configuration in the config.toml file'''
+
+import shutil
+import tomllib
+import logging
+from cnf.config import ConfigIfc
+
+
+class ConfigIfcProxy(ConfigIfc):
+    def __init__(self):   # pragma: no cover
+        try:
+            # make the default config transparaent by copying it
+            # in the config.example file
+            logging.info('Copy Default Config to config.example.toml')
+
+            shutil.copy2("default_config.toml",
+                         "config/config.example.toml")
+        except Exception:
+            pass
+
+    def get_config(self, cnf_file="config/config.toml") -> dict:
+        usr_config = {}
+
+        try:
+            with open(cnf_file, "rb") as f:
+                usr_config = tomllib.load(f)
+        except Exception as error:
+            err = f'Config.read: {error}'
+            logging.error(err)
+            logging.info(
+                '\n  To create the missing config.toml file, '
+                'you can rename the template config.example.toml\n'
+                '  and customize it for your scenario.\n')
+        return usr_config
diff --git a/app/src/gen3/talent.py b/app/src/gen3/talent.py
index da3ebc8..efb080a 100644
--- a/app/src/gen3/talent.py
+++ b/app/src/gen3/talent.py
@@ -7,7 +7,7 @@ from tzlocal import get_localzone
 from async_ifc import AsyncIfc
 from messages import Message, State
 from modbus import Modbus
-from config import Config
+from cnf.config import Config
 from gen3.infos_g3 import InfosG3
 from infos import Register
 
diff --git a/app/src/gen3plus/solarman_v5.py b/app/src/gen3plus/solarman_v5.py
index f95894e..463c043 100644
--- a/app/src/gen3plus/solarman_v5.py
+++ b/app/src/gen3plus/solarman_v5.py
@@ -6,7 +6,7 @@ from datetime import datetime
 
 from async_ifc import AsyncIfc
 from messages import hex_dump_memory, Message, State
-from config import Config
+from cnf.config import Config
 from modbus import Modbus
 from gen3plus.infos_g3p import InfosG3P
 from infos import Register, Fmt
diff --git a/app/src/inverter_base.py b/app/src/inverter_base.py
index 757b883..580490c 100644
--- a/app/src/inverter_base.py
+++ b/app/src/inverter_base.py
@@ -12,7 +12,7 @@ from proxy import Proxy
 from async_stream import StreamPtr
 from async_stream import AsyncStreamClient
 from async_stream import AsyncStreamServer
-from config import Config
+from cnf.config import Config
 from infos import Infos
 
 logger_mqtt = logging.getLogger('mqtt')
diff --git a/app/src/modbus_tcp.py b/app/src/modbus_tcp.py
index f3788d4..7d371c9 100644
--- a/app/src/modbus_tcp.py
+++ b/app/src/modbus_tcp.py
@@ -2,7 +2,7 @@ import logging
 import traceback
 import asyncio
 
-from config import Config
+from cnf.config import Config
 from gen3plus.inverter_g3p import InverterG3P
 from infos import Infos
 
diff --git a/app/src/mqtt.py b/app/src/mqtt.py
index f52b797..0d33cac 100644
--- a/app/src/mqtt.py
+++ b/app/src/mqtt.py
@@ -5,7 +5,7 @@ import traceback
 
 from modbus import Modbus
 from messages import Message
-from config import Config
+from cnf.config import Config
 from singleton import Singleton
 
 logger_mqtt = logging.getLogger('mqtt')
diff --git a/app/src/proxy.py b/app/src/proxy.py
index eadc3ac..3f4f263 100644
--- a/app/src/proxy.py
+++ b/app/src/proxy.py
@@ -2,7 +2,7 @@ import asyncio
 import logging
 import json
 
-from config import Config
+from cnf.config import Config
 from mqtt import Mqtt
 from infos import Infos
 
diff --git a/app/src/server.py b/app/src/server.py
index cda8501..3f997bd 100644
--- a/app/src/server.py
+++ b/app/src/server.py
@@ -10,7 +10,8 @@ from inverter_ifc import InverterIfc
 from gen3.inverter_g3 import InverterG3
 from gen3plus.inverter_g3p import InverterG3P
 from scheduler import Schedule
-from config import Config
+from cnf.config import Config
+from cnf.config_ifc_proxy import ConfigIfcProxy
 from modbus_tcp import ModbusTcp
 
 routes = web.RouteTableDef()
@@ -149,7 +150,7 @@ if __name__ == "__main__":
     asyncio.set_event_loop(loop)
 
     # read config file
-    ConfigErr = Config.class_init()
+    ConfigErr = Config.init(ConfigIfcProxy())
     if ConfigErr is not None:
         logging.info(f'ConfigErr: {ConfigErr}')
     Proxy.class_init()
diff --git a/app/tests/test_config.py b/app/tests/test_config.py
index aaac45c..3eb2169 100644
--- a/app/tests/test_config.py
+++ b/app/tests/test_config.py
@@ -1,16 +1,16 @@
 # test_with_pytest.py
 import tomllib
 from schema import SchemaMissingKeyError
-from config import Config
+from cnf.config import Config, ConfigIfc
 
-class TstConfig(Config):
+class TstConfig(ConfigIfc):
 
     @classmethod
-    def set(cls, cnf):
+    def __init__(cls, cnf):
         cls.act_config = cnf
 
     @classmethod
-    def _read_config_file(cls) -> dict:
+    def get_config(cls) -> dict:
         return cls.act_config
 
 
@@ -93,10 +93,9 @@ def test_mininum_config():
 
 def test_read_empty():
     cnf = {}
-    TstConfig.set(cnf)
-    err = TstConfig.read('app/config/')
+    err = Config.init(TstConfig(cnf), 'app/config/')
     assert err == None
-    cnf = TstConfig.get()
+    cnf = Config.get()
     assert cnf == {'gen3plus': {'at_acl': {'mqtt': {'allow': ['AT+'], 'block': []}, 'tsun': {'allow': ['AT+Z', 'AT+UPURL', 'AT+SUPDATE'], 'block': []}}}, 'tsun': {'enabled': True, 'host': 'logger.talent-monitoring.com', 'port': 5005}, 'solarman': {'enabled': True, 'host': 'iot.talent-monitoring.com', 'port': 10000}, 'mqtt': {'host': 'mqtt', 'port': 1883, 'user': None, 'passwd': None}, 'ha': {'auto_conf_prefix': 'homeassistant', 'discovery_prefix': 'homeassistant', 'entity_prefix': 'tsun', 'proxy_node_id': 'proxy', 'proxy_unique_id': 'P170000000000001'},
                    'inverters': {
                        'allow_all': False,
@@ -129,26 +128,24 @@ def test_read_empty():
                     }
                   }
     
-    defcnf = TstConfig.def_config.get('solarman') 
+    defcnf = Config.def_config.get('solarman') 
     assert defcnf == {'enabled': True, 'host': 'iot.talent-monitoring.com', 'port': 10000}
-    assert True == TstConfig.is_default('solarman')
+    assert True == Config.is_default('solarman')
 
 def test_no_file():
     cnf = {}
-    TstConfig.set(cnf)
-    err = TstConfig.read('')
+    err = Config.init(TstConfig(cnf), '')
     assert err == "Config.read: [Errno 2] No such file or directory: 'default_config.toml'"
-    cnf = TstConfig.get()
+    cnf = Config.get()
     assert cnf == {}    
-    defcnf = TstConfig.def_config.get('solarman') 
+    defcnf = Config.def_config.get('solarman') 
     assert defcnf == None
 
 def test_read_cnf1():
     cnf = {'solarman' : {'enabled': False}}
-    TstConfig.set(cnf)
-    err = TstConfig.read('app/config/')
+    err = Config.init(TstConfig(cnf), 'app/config/')
     assert err == None
-    cnf = TstConfig.get()
+    cnf = Config.get()
     assert cnf == {'gen3plus': {'at_acl': {'mqtt': {'allow': ['AT+'], 'block': []}, 'tsun': {'allow': ['AT+Z', 'AT+UPURL', 'AT+SUPDATE'], 'block': []}}}, 'tsun': {'enabled': True, 'host': 'logger.talent-monitoring.com', 'port': 5005}, 'solarman': {'enabled': False, 'host': 'iot.talent-monitoring.com', 'port': 10000}, 'mqtt': {'host': 'mqtt', 'port': 1883, 'user': None, 'passwd': None}, 'ha': {'auto_conf_prefix': 'homeassistant', 'discovery_prefix': 'homeassistant', 'entity_prefix': 'tsun', 'proxy_node_id': 'proxy', 'proxy_unique_id': 'P170000000000001'},
                    'inverters': {
                        'allow_all': False,
@@ -180,18 +177,17 @@ def test_read_cnf1():
                        }
                     }
                   }
-    cnf = TstConfig.get('solarman')
+    cnf = Config.get('solarman')
     assert cnf == {'enabled': False, 'host': 'iot.talent-monitoring.com', 'port': 10000}    
-    defcnf = TstConfig.def_config.get('solarman') 
+    defcnf = Config.def_config.get('solarman') 
     assert defcnf == {'enabled': True, 'host': 'iot.talent-monitoring.com', 'port': 10000}
-    assert False == TstConfig.is_default('solarman')
+    assert False == Config.is_default('solarman')
                    
 def test_read_cnf2():
     cnf = {'solarman' : {'enabled': 'FALSE'}}
-    TstConfig.set(cnf)
-    err = TstConfig.read('app/config/')
+    err = Config.init(TstConfig(cnf), 'app/config/')
     assert err == None
-    cnf = TstConfig.get()
+    cnf = Config.get()
     assert cnf == {'gen3plus': {'at_acl': {'mqtt': {'allow': ['AT+'], 'block': []}, 'tsun': {'allow': ['AT+Z', 'AT+UPURL', 'AT+SUPDATE'], 'block': []}}}, 'tsun': {'enabled': True, 'host': 'logger.talent-monitoring.com', 'port': 5005}, 'solarman': {'enabled': True, 'host': 'iot.talent-monitoring.com', 'port': 10000}, 'mqtt': {'host': 'mqtt', 'port': 1883, 'user': None, 'passwd': None}, 'ha': {'auto_conf_prefix': 'homeassistant', 'discovery_prefix': 'homeassistant', 'entity_prefix': 'tsun', 'proxy_node_id': 'proxy', 'proxy_unique_id': 'P170000000000001'},
                    'inverters': {
                        'allow_all': False,
@@ -223,22 +219,20 @@ def test_read_cnf2():
                        }
                     }
                   }
-    assert True == TstConfig.is_default('solarman')
+    assert True == Config.is_default('solarman')
 
 def test_read_cnf3():
     cnf = {'solarman' : {'port': 'FALSE'}}
-    TstConfig.set(cnf)
-    err = TstConfig.read('app/config/')
+    err = Config.init(TstConfig(cnf), 'app/config/')
     assert err == 'Config.read: Key \'solarman\' error:\nKey \'port\' error:\nint(\'FALSE\') raised ValueError("invalid literal for int() with base 10: \'FALSE\'")'
-    cnf = TstConfig.get()
-    assert cnf == {'solarman': {'port': 'FALSE'}}
+    cnf = Config.get()
+    assert cnf == {}
 
 def test_read_cnf4():
     cnf = {'solarman' : {'port': 5000}}
-    TstConfig.set(cnf)
-    err = TstConfig.read('app/config/')
+    err = Config.init(TstConfig(cnf), 'app/config/')
     assert err == None
-    cnf = TstConfig.get()
+    cnf = Config.get()
     assert cnf == {'gen3plus': {'at_acl': {'mqtt': {'allow': ['AT+'], 'block': []}, 'tsun': {'allow': ['AT+Z', 'AT+UPURL', 'AT+SUPDATE'], 'block': []}}}, 'tsun': {'enabled': True, 'host': 'logger.talent-monitoring.com', 'port': 5005}, 'solarman': {'enabled': True, 'host': 'iot.talent-monitoring.com', 'port': 5000}, 'mqtt': {'host': 'mqtt', 'port': 1883, 'user': None, 'passwd': None}, 'ha': {'auto_conf_prefix': 'homeassistant', 'discovery_prefix': 'homeassistant', 'entity_prefix': 'tsun', 'proxy_node_id': 'proxy', 'proxy_unique_id': 'P170000000000001'},
                    'inverters': {
                        'allow_all': False,
@@ -270,16 +264,14 @@ def test_read_cnf4():
                        }
                     }
                   }
-    assert False == TstConfig.is_default('solarman')
+    assert False == Config.is_default('solarman')
 
 def test_read_cnf5():
     cnf = {'solarman' : {'port': 1023}}
-    TstConfig.set(cnf)
-    err = TstConfig.read('app/config/')
+    err = Config.init(TstConfig(cnf), 'app/config/')
     assert err != None
 
 def test_read_cnf6():
     cnf = {'solarman' : {'port': 65536}}
-    TstConfig.set(cnf)
-    err = TstConfig.read('app/config/')
+    err = Config.init(TstConfig(cnf), 'app/config/')
     assert err != None
diff --git a/app/tests/test_config_ifc_proxy.py b/app/tests/test_config_ifc_proxy.py
new file mode 100644
index 0000000..02b0ec7
--- /dev/null
+++ b/app/tests/test_config_ifc_proxy.py
@@ -0,0 +1,53 @@
+# test_with_pytest.py
+import tomllib
+from schema import SchemaMissingKeyError
+from cnf.config_ifc_proxy import ConfigIfcProxy
+
+class CnfIfc(ConfigIfcProxy):
+    def __init__(self):
+        pass
+
+def test_no_config():
+    cnf_ifc = CnfIfc()
+
+    cnf = cnf_ifc.get_config("")
+    assert cnf == {}
+
+def test_get_config():
+    cnf_ifc = CnfIfc()
+
+    cnf = cnf_ifc.get_config("app/config/default_config.toml")
+    assert cnf == {
+        'gen3plus': {'at_acl': {'mqtt': {'allow': ['AT+'], 'block': []}, 'tsun': {'allow': ['AT+Z', 'AT+UPURL', 'AT+SUPDATE'], 'block': []}}},
+        'tsun': {'enabled': True, 'host': 'logger.talent-monitoring.com', 'port': 5005},
+        'solarman': {'enabled': True, 'host': 'iot.talent-monitoring.com', 'port': 10000},
+        'mqtt': {'host': 'mqtt', 'port': 1883, 'user': '', 'passwd': ''},
+        'ha': {'auto_conf_prefix': 'homeassistant', 'discovery_prefix': 'homeassistant', 'entity_prefix': 'tsun', 'proxy_node_id': 'proxy', 'proxy_unique_id': 'P170000000000001'},
+        'inverters': {
+            'allow_all': False, 
+            'R170000000000001': {
+                                 'node_id': '', 
+                                 'pv1': {'manufacturer': 'Risen',
+                                         'type': 'RSM40-8-395M'},
+                                 'pv2': {'manufacturer': 'Risen',
+                                         'type': 'RSM40-8-395M'},
+                                 'modbus_polling': False,
+                                 'suggested_area': ''
+            }, 
+            'Y170000000000001': {
+                                 'modbus_polling': True, 
+                                 'monitor_sn': 2000000000, 
+                                 'node_id': '',
+                                 'pv1': {'manufacturer': 'Risen',
+                                         'type': 'RSM40-8-410M'},
+                                 'pv2': {'manufacturer': 'Risen',
+                                         'type': 'RSM40-8-410M'},
+                                 'pv3': {'manufacturer': 'Risen',
+                                         'type': 'RSM40-8-410M'},
+                                 'pv4': {'manufacturer': 'Risen',
+                                         'type': 'RSM40-8-410M'},
+                                 'suggested_area': ''
+            }
+        }
+    }
+
diff --git a/app/tests/test_inverter_base.py b/app/tests/test_inverter_base.py
index 5962a49..2e05777 100644
--- a/app/tests/test_inverter_base.py
+++ b/app/tests/test_inverter_base.py
@@ -6,7 +6,7 @@ import gc
 from mock import patch
 from enum import Enum
 from infos import Infos
-from config import Config
+from cnf.config import Config
 from gen3.talent import Talent
 from inverter_base import InverterBase
 from singleton import Singleton
diff --git a/app/tests/test_inverter_g3.py b/app/tests/test_inverter_g3.py
index a841dbc..620173c 100644
--- a/app/tests/test_inverter_g3.py
+++ b/app/tests/test_inverter_g3.py
@@ -6,7 +6,7 @@ import sys,gc
 from mock import patch
 from enum import Enum
 from infos import Infos
-from config import Config
+from cnf.config import Config
 from proxy import Proxy
 from inverter_base import InverterBase
 from singleton import Singleton
diff --git a/app/tests/test_inverter_g3p.py b/app/tests/test_inverter_g3p.py
index 307018b..6bb98ed 100644
--- a/app/tests/test_inverter_g3p.py
+++ b/app/tests/test_inverter_g3p.py
@@ -5,7 +5,7 @@ import asyncio
 from mock import patch
 from enum import Enum
 from infos import Infos
-from config import Config
+from cnf.config import Config
 from proxy import Proxy
 from inverter_base import InverterBase
 from singleton import Singleton
diff --git a/app/tests/test_modbus_tcp.py b/app/tests/test_modbus_tcp.py
index e901e96..1c69b60 100644
--- a/app/tests/test_modbus_tcp.py
+++ b/app/tests/test_modbus_tcp.py
@@ -6,7 +6,7 @@ from aiomqtt import MqttCodeError
 from mock import patch
 from enum import Enum
 from singleton import Singleton
-from config import Config
+from cnf.config import Config
 from infos import Infos
 from mqtt import Mqtt
 from inverter_base import InverterBase
diff --git a/app/tests/test_mqtt.py b/app/tests/test_mqtt.py
index 91acd02..9c2923c 100644
--- a/app/tests/test_mqtt.py
+++ b/app/tests/test_mqtt.py
@@ -10,7 +10,7 @@ from singleton import Singleton
 from mqtt import Mqtt
 from modbus import Modbus
 from gen3plus.solarman_v5 import SolarmanV5
-from config import Config
+from cnf.config import Config
 
 
 pytest_plugins = ('pytest_asyncio',)
diff --git a/app/tests/test_proxy.py b/app/tests/test_proxy.py
index aa6c739..ace707e 100644
--- a/app/tests/test_proxy.py
+++ b/app/tests/test_proxy.py
@@ -9,7 +9,7 @@ from singleton import Singleton
 from proxy import Proxy
 from mqtt import Mqtt
 from gen3plus.solarman_v5 import SolarmanV5
-from config import Config
+from cnf.config import Config
 
 
 pytest_plugins = ('pytest_asyncio',)
diff --git a/app/tests/test_solarman.py b/app/tests/test_solarman.py
index 6d19688..6f11bec 100644
--- a/app/tests/test_solarman.py
+++ b/app/tests/test_solarman.py
@@ -7,7 +7,7 @@ import random
 from math import isclose
 from async_stream import AsyncIfcImpl, StreamPtr
 from gen3plus.solarman_v5 import SolarmanV5, SolarmanBase
-from config import Config
+from cnf.config import Config
 from infos import Infos, Register
 from modbus import Modbus
 from messages import State, Message
diff --git a/app/tests/test_talent.py b/app/tests/test_talent.py
index 32fd6fe..2b1ef6c 100644
--- a/app/tests/test_talent.py
+++ b/app/tests/test_talent.py
@@ -3,7 +3,7 @@ import pytest, logging, asyncio
 from math import isclose
 from async_stream import AsyncIfcImpl, StreamPtr
 from gen3.talent import Talent, Control
-from config import Config
+from cnf.config import Config
 from infos import Infos, Register
 from modbus import Modbus
 from messages import State