diff --git a/csharp/Lib/Devices/AMPT/AmptDevices.cs b/csharp/Lib/Devices/AMPT/AmptDevices.cs
index 1674baffe..003e09b20 100644
--- a/csharp/Lib/Devices/AMPT/AmptDevices.cs
+++ b/csharp/Lib/Devices/AMPT/AmptDevices.cs
@@ -77,8 +77,8 @@ public class AmptDevices
             Current = busCurrent
         };
         
-        // flatten the 2 strings of each SO into one array 
-        var strings = soStati.SelectMany(GetStrings).ToArray(nStrings);
+        // flatten the output strings of each SO into one array 
+        var strings = soStati.SelectMany(GetDc).ToArray(nStrings);
 
         return new AmptStatus
         {
@@ -107,6 +107,16 @@ public class AmptDevices
         };
     }
 
+    private static IEnumerable<DcBus> GetDc(StringOptimizerRegisters r)
+    {
+        // hardcoded: every SO has 2 strings (produced like this by AMPT)
+        
+        yield return new()
+        {
+            Voltage = r.Voltage,
+            Current = r.Current,
+        };
+    }
 
     private static IEnumerable<ModbusDevice<StringOptimizerRegisters>> StringOptimizers(ModbusClient modbusClient)
     {