diff --git a/csharp/Lib/Devices/AMPT/StringOptimizerRegisters.cs b/csharp/Lib/Devices/AMPT/StringOptimizerRegisters.cs
index 6ae8327c7..c19608645 100644
--- a/csharp/Lib/Devices/AMPT/StringOptimizerRegisters.cs
+++ b/csharp/Lib/Devices/AMPT/StringOptimizerRegisters.cs
@@ -7,6 +7,7 @@ namespace InnovEnergy.Lib.Devices.AMPT;
 [SuppressMessage("ReSharper", "UnusedMember.Global")]
 [SuppressMessage("ReSharper", "UnusedAutoPropertyAccessor.Local")]
 
+// the scale here can be read from CommunicationUnitRegisters, It looks like fixed value
 [OneBasedAddressing][BigEndian]
 public record StringOptimizerRegisters
 {
@@ -18,7 +19,7 @@ public record StringOptimizerRegisters
     [HoldingRegister<UInt32>(93, Scale = .001)] public Double  String1Voltage  { get; private set; }
     [HoldingRegister<UInt32>(95, Scale = .001)] public Double  String2Voltage  { get; private set; }
     
-    [HoldingRegister<UInt32>(97)]               public Double  ProductionToday { get; private set; }
+    [HoldingRegister<UInt32>(97, Scale = .001)] public Double  ProductionToday { get; private set; }
     
     [HoldingRegister<Int16>(99,  Scale = .001)] public Double  String1Current  { get; private set; }
     [HoldingRegister<Int16>(100, Scale = .001)] public Double  String2Current  { get; private set; }