diff --git a/ha_addons/ha_addon/DOCS.md b/ha_addons/ha_addon/DOCS.md
index 18c0aef..e4ed379 100644
--- a/ha_addons/ha_addon/DOCS.md
+++ b/ha_addons/ha_addon/DOCS.md
@@ -67,7 +67,7 @@ Example add-on configuration for GEN3PLUS inverters:
 ```yaml
 inverters:
   - serial: Y17000000000000
-    monitor_sn: '2000000000'
+    monitor_sn: 2000000000
     node_id: PV-Garage
     suggested_area: Garage
     modbus_polling: true
diff --git a/ha_addons/templates/config.jinja b/ha_addons/templates/config.jinja
index 599ca12..da67014 100755
--- a/ha_addons/templates/config.jinja
+++ b/ha_addons/templates/config.jinja
@@ -31,16 +31,16 @@ ports:
 # parameters are available within the container as /data/options.json
 # and should become picked up by the proxy - current workaround as a transfer script
 # TODO: check again for multi hierarchie parameters
-# TODO: implement direct reading of the configuration file
+
 schema:
   inverters:
-    - serial: str
+    - serial: match(^(R17|Y17|Y47).{13}$)
       monitor_sn: int?
       node_id: str
       suggested_area: str
       modbus_polling: bool
-      client_mode.host: str?
-      client_mode.port: int?
+      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?
       #strings: # leider funktioniert es nicht die folgenden 3 parameter im schema aufzulisten. möglicherweise wird die verschachtelung nicht unterstützt.
       #  - string: str
@@ -62,10 +62,11 @@ schema:
   tsun.enabled: bool
   solarman.enabled: bool
   inverters.allow_all: bool
+
   # optionale parameter
-  # TODO besser strukturieren und vervollständigen
+
   mqtt.host: str?
-  mqtt.port: int?
+  mqtt.port: port?
   mqtt.user: str?
   mqtt.passwd: password?
   ha.auto_conf_prefix: str? # suggeriert optionale konfigurationsoption -> es darf jedoch kein default unter "options" angegeben werden