diff --git a/libraries/AP_Logger/LogFile.cpp b/libraries/AP_Logger/LogFile.cpp
index 4b84b84d78..b1caec9cdd 100644
--- a/libraries/AP_Logger/LogFile.cpp
+++ b/libraries/AP_Logger/LogFile.cpp
@@ -480,6 +480,7 @@ void AP_Logger::Write_Power(void)
         Vcc     : hal.analogin->board_voltage(),
         Vservo  : hal.analogin->servorail_voltage(),
         flags   : hal.analogin->power_status_flags(),
+        accumulated_flags   : hal.analogin->accumulated_power_status_flags(),
         safety_and_arm : safety_and_armed
     };
     WriteBlock(&pkt, sizeof(pkt));
diff --git a/libraries/AP_Logger/LogStructure.h b/libraries/AP_Logger/LogStructure.h
index 6ad8274cae..314d33028a 100644
--- a/libraries/AP_Logger/LogStructure.h
+++ b/libraries/AP_Logger/LogStructure.h
@@ -392,6 +392,7 @@ struct PACKED log_POWR {
     float Vcc;
     float Vservo;
     uint16_t flags;
+    uint16_t accumulated_flags;
     uint8_t safety_and_arm;
 };
 
@@ -1930,6 +1931,7 @@ struct PACKED log_Arm_Disarm {
 // @Field: Vcc: Flight board voltage
 // @Field: VServo: Servo rail voltage
 // @Field: Flags: System power flags
+// @Field: AccFlags: Accumulated System power flags; all flags which have ever been set
 // @Field: Safety: Hardware Safety Switch status
 
 // @LoggerMessage: PRX
@@ -2356,7 +2358,7 @@ struct PACKED log_Arm_Disarm {
     { LOG_BARO_MSG, sizeof(log_BARO), \
       "BARO",  BARO_FMT, BARO_LABELS, BARO_UNITS, BARO_MULTS }, \
     { LOG_POWR_MSG, sizeof(log_POWR), \
-      "POWR","QffHB","TimeUS,Vcc,VServo,Flags,Safety", "svv--", "F00--" },  \
+      "POWR","QffHHB","TimeUS,Vcc,VServo,Flags,AccFlags,Safety", "svv---", "F00---" },  \
     { LOG_CMD_MSG, sizeof(log_Cmd), \
       "CMD", "QHHHffffLLfB","TimeUS,CTot,CNum,CId,Prm1,Prm2,Prm3,Prm4,Lat,Lng,Alt,Frame", "s-------DUm-", "F-------GG0-" }, \
     { LOG_MAVLINK_COMMAND_MSG, sizeof(log_MAVLink_Command), \