diff --git a/csharp/Lib/Devices/Trumpf/TruConvertAc/AcDcDevicesRecord.cs b/csharp/Lib/Devices/Trumpf/TruConvertAc/AcDcDevicesRecord.cs
index cae0fbb1c..54eece404 100644
--- a/csharp/Lib/Devices/Trumpf/TruConvertAc/AcDcDevicesRecord.cs
+++ b/csharp/Lib/Devices/Trumpf/TruConvertAc/AcDcDevicesRecord.cs
@@ -1,15 +1,12 @@
 using InnovEnergy.Lib.Devices.Trumpf.SystemControl;
 using InnovEnergy.Lib.Devices.Trumpf.TruConvertAc.DataTypes;
-using InnovEnergy.Lib.StatusApi.DeviceTypes;
 using InnovEnergy.Lib.Units.Composite;
 
 namespace InnovEnergy.Lib.Devices.Trumpf.TruConvertAc;
 
-public class AcDcDevicesRecord : IAcDc3
+public class AcDcDevicesRecord
 {
-    
-    // private static readonly AcPhase NoAcPhase = Ac3Bus.FromPhasesAndFrequency()
-    // private static readonly Ac3Bus NoAcDevice = Ac3Bus.FromPhasesAndFrequency()
+    public static AcDcDevicesRecord Null { get; } = new AcDcDevicesRecord(null, Array.Empty<AcDcRecord>());
 
     public AcDcDevicesRecord(SystemControlRegisters? systemControl, IReadOnlyList<AcDcRecord> devices)
     {
@@ -60,11 +57,26 @@ public class AcDcDevicesRecord : IAcDc3
         }
     }
 
-    public DcBus Dc => Devices.Count == 0
-                     ? DcBus.Null
-                     : DcBus.FromVoltageCurrent
-                     (
-                         voltage: Devices.Average(d => d.Status.Dc.Voltage),
-                         current: Devices.Sum(d => d.Status.Dc.Current)
-                     );
+    public DcBus Dc
+    {
+        get
+        {
+            if (Devices.Count == 0)
+                return DcBus.Null;
+
+            var u = Devices
+                   .Select(d => d.Status.DcVoltages.Extern)
+                   .Select(vs => vs.LowerHalf + vs.UpperHalf)
+                   .Average();
+
+            var p = Ac.Power.Active.Value;
+            var i = u == 0 ? 0 : p / u;
+            
+            return DcBus.FromVoltageCurrent
+            (
+                voltage: u,
+                current: i
+            );
+        }
+    }
 }
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