diff --git a/power-supply/power_supply.cpp b/power-supply/power_supply.cpp
index d7a018f..fbc5b1d 100644
--- a/power-supply/power_supply.cpp
+++ b/power-supply/power_supply.cpp
@@ -61,6 +61,9 @@
                        // The hwmon path may have changed.
                        pmbusIntf.findHwmonDir();
                        this->present = true;
+
+                       // Update the inventory for the new device
+                       updateInventory();
                    }),
       powerOnInterval(t),
       powerOnTimer(e, [this]()
@@ -80,6 +83,9 @@
     // Get initial presence state.
     updatePresence();
 
+    // Write the SN, PN, etc to the inventory
+    updateInventory();
+
     // Subscribe to power state changes
     powerOnMatch = std::make_unique<match_t>(bus,
                                              match::rules::propertiesChanged(
@@ -173,6 +179,9 @@
         {
             present = false;
             presentTimer.stop();
+
+            //Clear out the now outdated inventory properties
+            updateInventory();
         }
     }
 
@@ -606,6 +615,10 @@
 
 }
 
+void PowerSupply::updateInventory()
+{
+}
+
 }
 }
 }
diff --git a/power-supply/power_supply.hpp b/power-supply/power_supply.hpp
index c969734..9ad1570 100644
--- a/power-supply/power_supply.hpp
+++ b/power-supply/power_supply.hpp
@@ -321,6 +321,23 @@
          */
         void checkTemperatureFault(const uint16_t statusWord);
 
+        /**
+         * @brief Adds properties to the inventory.
+         *
+         * Reads the values from the device and writes them to the
+         * associated power supply D-Bus inventory object.
+         *
+         * This needs to be done on startup, and each time the presence
+         * state changes.
+         *
+         * Properties added:
+         * - Serial Number
+         * - Part Number
+         * - CCIN (Customer Card Identification Number) - added as the Model
+         * - Firmware version
+         */
+        void updateInventory();
+
 };
 
 }