diff --git a/libraries/AP_BattMonitor/AP_BattMonitor_Backend.h b/libraries/AP_BattMonitor/AP_BattMonitor_Backend.h
index 3d02bce2e8..6e28e4c7fc 100644
--- a/libraries/AP_BattMonitor/AP_BattMonitor_Backend.h
+++ b/libraries/AP_BattMonitor/AP_BattMonitor_Backend.h
@@ -29,7 +29,7 @@ public:
     virtual ~AP_BattMonitor_Backend(void) {}
 
     // initialise
-    virtual void init() = 0;
+    virtual void init() {};
 
     // read the latest battery voltage
     virtual void read() = 0;
diff --git a/libraries/AP_BattMonitor/AP_BattMonitor_MPPT_PacketDigital.h b/libraries/AP_BattMonitor/AP_BattMonitor_MPPT_PacketDigital.h
index b13446fab7..f8e6090078 100644
--- a/libraries/AP_BattMonitor/AP_BattMonitor_MPPT_PacketDigital.h
+++ b/libraries/AP_BattMonitor/AP_BattMonitor_MPPT_PacketDigital.h
@@ -29,9 +29,6 @@ public:
     /// returns true if battery monitor provides current info
     bool has_current() const override { return true; }
 
-    void init(void) override {}
-
-
 protected:
     // handler for incoming frames
     void handle_frame(AP_HAL::CANFrame &frame) override;