This is actually handled by structs lib

src/sunsynk/helpers.py

@@ -26,15 +26,9 @@ def pack_value(value: int, bits: int = 16, signed: bool = True) -> RegType:
         For 32-bit: tuple of (low, high) register values
     """
     if bits == 16:
-        if not signed and value < 0:
-            # Convert negative value to two's complement for unsigned
-            value = value + (1 << 16)
         fmt = 'h' if signed else 'H'
         return struct.unpack('H', struct.pack(fmt, value))
     if bits == 32:
-        if not signed and value < 0:
-            # Convert negative value to two's complement for unsigned
-            value = value + (1 << 32)
         fmt = 'i' if signed else 'I'
         return struct.unpack('2H', struct.pack(fmt, value))
     raise ValueError(f"Unsupported number of bits: {bits}")