diff --git a/tests/test_dc_energy_meter.py b/tests/test_dc_energy_meter.py
index 6522e91..03819fd 100644
--- a/tests/test_dc_energy_meter.py
+++ b/tests/test_dc_energy_meter.py
@@ -14,7 +14,7 @@ def test_end_to_end_parse(self) -> None:
         )
 
         assert isinstance(actual, DcEnergyMeterData)
-        assert actual.get_meter_type() == MeterType.FUEL_CELL
+        assert actual.get_meter_type() == MeterType.DC_DC_CHARGER
         assert actual.get_aux_mode() == AuxMode.STARTER_VOLTAGE
         assert actual.get_current() == 0.0
         assert actual.get_voltage() == 12.52
@@ -31,7 +31,7 @@ def parse_decrypted(self, decrypted: str) -> DcEnergyMeterData:
 
     def test_parse(self) -> None:
         actual = self.parse_decrypted("fdffe4040000ffff00000059a65a1c8c")
-        assert actual.get_meter_type() == MeterType.FUEL_CELL
+        assert actual.get_meter_type() == MeterType.DC_DC_CHARGER
         assert actual.get_aux_mode() == AuxMode.STARTER_VOLTAGE
         assert actual.get_current() == 0.0
         assert actual.get_voltage() == 12.52
@@ -41,8 +41,25 @@ def test_parse(self) -> None:
 
     def test_aux_starter(self) -> None:
         actual = self.parse_decrypted("fdffe4040000ffff00000059a65a1c8c")
+        assert actual.get_aux_mode() == AuxMode.STARTER_VOLTAGE
         assert actual.get_starter_voltage() == -0.01
 
-    def test_aux_temperature(self) -> None:
+    def test_aux_temperature_none(self) -> None:
         actual = self.parse_decrypted("fdffe4040000ffff020000ae28af8a5c")
-        assert actual.get_temperature() == 382.2
+        assert actual.get_aux_mode() == AuxMode.TEMPERATURE
+        assert actual.get_temperature() is None
+
+    def test_aux_temperature(self) -> None:
+        actual = self.parse_decrypted("fdffe40400008888020000ae28af8a5c")
+        assert actual.get_aux_mode() == AuxMode.TEMPERATURE
+        assert actual.get_temperature() == 76.37
+
+    def test_generic_source(self) -> None:
+        actual = self.parse_decrypted("ffff6f0a0000000003000043698118eb")
+        assert actual.get_meter_type() == MeterType.GENERIC_SOURCE
+        assert actual.get_aux_mode() == AuxMode.DISABLED
+        assert actual.get_current() == 0.0
+        assert actual.get_voltage() == 26.71
+        assert actual.get_starter_voltage() is None
+        assert actual.get_alarm() is None
+        assert actual.get_temperature() is None
diff --git a/victron_ble/devices/base.py b/victron_ble/devices/base.py
index 41e3417..2d6ff66 100644
--- a/victron_ble/devices/base.py
+++ b/victron_ble/devices/base.py
@@ -365,6 +365,7 @@ class ACInState(Enum):
     0xA3C7: "Orion Smart 48V|48V-6A Isolated DC-DC Charger",
     0xA3CF: "Orion Smart 48V|48V-8.5A Isolated DC-DC Charger",
     0x2780: "Victron Multiplus II 12/3000/120-50 2x120V",
+    0xC030: "SmartShunt IP65 500A/50mV",
 }
 
 
diff --git a/victron_ble/devices/dc_energy_meter.py b/victron_ble/devices/dc_energy_meter.py
index a806ad8..0d39bc8 100644
--- a/victron_ble/devices/dc_energy_meter.py
+++ b/victron_ble/devices/dc_energy_meter.py
@@ -1,30 +1,30 @@
 from enum import Enum
 from typing import Optional
 
-from construct import Int16sl, Int16ul, Int24sl, Struct
+from construct import BitStruct, BitsInteger, ByteSwapped, Int16sl, Padding
 
 from victron_ble.devices.base import AlarmReason, Device, DeviceData, kelvin_to_celsius
 from victron_ble.devices.battery_monitor import AuxMode
 
 
 class MeterType(Enum):
-    SOLAR_CHARGER = -7
-    WIND_CHARGER = -6
-    SHAFT_GENERATOR = -5
-    ALTERNATOR = -4
-    FUEL_CELL = -3
-    WATER_GENERATOR = -2
-    DC_DC_CHARGER = -1
-    AC_CHARGER = 1
-    GENERIC_SOURCE = 2
-    GENERIC_LOAD = 3
-    ELECTRIC_DRIVE = 4
-    FRIDGE = 5
-    WATER_PUMP = 6
-    BILGE_PUMP = 7
-    DC_SYSTEM = 8
-    INVERTER = 9
-    WATER_HEATER = 10
+    SOLAR_CHARGER = -9
+    WIND_CHARGER = -8
+    SHAFT_GENERATOR = -7
+    ALTERNATOR = -6
+    FUEL_CELL = -5
+    WATER_GENERATOR = -4
+    DC_DC_CHARGER = -3
+    AC_CHARGER = -2
+    GENERIC_SOURCE = -1
+    GENERIC_LOAD = 1
+    ELECTRIC_DRIVE = 2
+    FRIDGE = 3
+    WATER_PUMP = 4
+    BILGE_PUMP = 5
+    DC_SYSTEM = 6
+    INVERTER = 7
+    WATER_HEATER = 8
 
 
 class DcEnergyMeterData(DeviceData):
@@ -77,27 +77,29 @@ def get_starter_voltage(self) -> Optional[float]:
 class DcEnergyMeter(Device):
     data_type = DcEnergyMeterData
 
-    PACKET = Struct(
-        "meter_type" / Int16sl,
-        # Voltage reading in 10mV increments
-        "voltage" / Int16ul,
-        # Alarm reason
-        "alarm" / Int16ul,
-        # Value of the auxillary input
-        "aux" / Int16ul,
-        # The upper 22 bits indicate the current in milliamps
-        # The lower 2 bits identify the aux input mode:
-        #   0 = Starter battery voltage
-        #   1 = Midpoint voltage
-        #   2 = Temperature
-        #   3 = Disabled
-        "current" / Int24sl,
+    PACKET = ByteSwapped(
+        BitStruct(
+            Padding(40),
+            "current" / BitsInteger(22, signed=True),
+            # Aux input mode:
+            #   0 = Starter battery voltage
+            #   1 = Midpoint voltage
+            #   2 = Temperature
+            #   3 = Disabled
+            "aux_mode" / BitsInteger(2),
+            # Value of the auxillary input
+            "aux" / BitsInteger(16),
+            # Alarm reason
+            "alarm" / BitsInteger(16),
+            # Voltage reading in 10mV increments
+            "voltage" / BitsInteger(16, signed=True),
+            "meter_type" / BitsInteger(16, signed=True),
+        )
     )
 
     def parse_decrypted(self, decrypted: bytes) -> dict:
         pkt = self.PACKET.parse(decrypted)
-
-        aux_mode = AuxMode(pkt.current & 0b11)
+        aux_mode = AuxMode(pkt.aux_mode)
 
         parsed = {
             "meter_type": MeterType(pkt.meter_type),
@@ -113,6 +115,10 @@ def parse_decrypted(self, decrypted: bytes) -> dict:
                 Int16sl.parse((pkt.aux).to_bytes(2, "little")) / 100
             )
         elif aux_mode == AuxMode.TEMPERATURE:
-            parsed["temperature_kelvin"] = pkt.aux / 100
+            if pkt.aux == 0xFFFF:
+                temp_k = None
+            else:
+                temp_k = pkt.aux / 100
+            parsed["temperature_kelvin"] = temp_k
 
         return parsed