diff --git a/libraries/AP_BattMonitor/AP_BattMonitor_DroneCAN.cpp b/libraries/AP_BattMonitor/AP_BattMonitor_DroneCAN.cpp
index 281831f0d1..123287c89a 100644
--- a/libraries/AP_BattMonitor/AP_BattMonitor_DroneCAN.cpp
+++ b/libraries/AP_BattMonitor/AP_BattMonitor_DroneCAN.cpp
@@ -137,7 +137,8 @@ void AP_BattMonitor_DroneCAN::update_interim_state(const float voltage, const fl
 
     const uint32_t tnow = AP_HAL::micros();
 
-    if (!_has_battery_info_aux || _mppt.is_detected) {
+    if (!_has_battery_info_aux ||
+        !use_CAN_SoC()) {
         const uint32_t dt_us = tnow - _interim_state.last_time_micros;
 
         // update total current drawn since startup