diff --git a/csharp/App/SaliMax/src/VirtualDevices/AcPowerDevice.cs b/csharp/App/SaliMax/src/VirtualDevices/AcPowerDevice.cs
index 0775a1018..6e20b3079 100644
--- a/csharp/App/SaliMax/src/VirtualDevices/AcPowerDevice.cs
+++ b/csharp/App/SaliMax/src/VirtualDevices/AcPowerDevice.cs
@@ -4,7 +4,5 @@ namespace InnovEnergy.App.SaliMax.VirtualDevices;
 
 public class AcPowerDevice
 {
-    public AcPower Power { get; init; } = AcPower.Null;
-
-    public static AcPowerDevice Null => new AcPowerDevice();
+    public required AcPower Power { get; init; } 
 }
\ No newline at end of file
diff --git a/csharp/App/SaliMax/src/VirtualDevices/DcPowerDevice.cs b/csharp/App/SaliMax/src/VirtualDevices/DcPowerDevice.cs
index d8f612124..876b14ada 100644
--- a/csharp/App/SaliMax/src/VirtualDevices/DcPowerDevice.cs
+++ b/csharp/App/SaliMax/src/VirtualDevices/DcPowerDevice.cs
@@ -4,5 +4,5 @@ namespace InnovEnergy.App.SaliMax.VirtualDevices;
 
 public class DcPowerDevice
 {
-    public DcPower Power { get; init; } = DcPower.Null;
+    public required DcPower Power { get; init; } 
 }
\ No newline at end of file