diff --git a/TestApp/Driver/IChargerDriver.cs b/TestApp/Driver/IChargerDriver.cs
new file mode 100644
index 0000000..2269cca
--- /dev/null
+++ b/TestApp/Driver/IChargerDriver.cs
@@ -0,0 +1,10 @@
+namespace TestApp.Driver
+{
+    internal interface IChargerDriver
+    {
+        string HostAddress { get; set; }
+        int Port { get; set; }
+
+        void SetLoadingCurrent(double value);
+    }
+}
diff --git a/TestApp/Driver/VestelEvc04.cs b/TestApp/Driver/VestelEvc04.cs
index 3af9d5e..637b797 100644
--- a/TestApp/Driver/VestelEvc04.cs
+++ b/TestApp/Driver/VestelEvc04.cs
@@ -3,7 +3,7 @@ using System.Net.Sockets;
 
 namespace TestApp.Driver
 {
-    internal class VestelEvc04
+    internal class VestelEvc04 : IChargerDriver
     {
         private IModbusMaster? _Modbus;
         private bool _Running;