diff --git a/monitor/system.hpp b/monitor/system.hpp
index a0030da..e01d81a 100644
--- a/monitor/system.hpp
+++ b/monitor/system.hpp
@@ -49,7 +49,6 @@
 
     /**
      * Constructor
-     * Parses and populates the fan monitor trust groups and list of fans
      *
      * @param[in] mode - mode of fan monitor
      * @param[in] bus - sdbusplus bus object
@@ -100,6 +99,26 @@
      */
     void logShutdownError();
 
+    /**
+     * @brief Returns true if power is on
+     */
+    bool isPowerOn() const
+    {
+        return _powerState->isPowerOn();
+    }
+
+    /**
+     * @brief Parses and populates the fan monitor
+     *        trust groups and list of fans
+     *
+     * @param[in] confFile - The config file path
+     */
+    void start(
+#ifdef MONITOR_USE_JSON
+        const std::string& confFile
+#endif
+    );
+
   private:
     /* The mode of fan monitor */
     Mode _mode;
@@ -151,6 +170,11 @@
     ThermalAlertObject _thermalAlert;
 
     /**
+     * @brief If start() has been called
+     */
+    bool _started = false;
+
+    /**
      * @brief Captures tach sensor data as JSON for use in
      *        fan fault and fan missing event logs.
      *