Auxiliary Battery Charging - an Observation

Tim94549

Well-Known Member
A couple months ago I experienced the Dead 12v Battery issue; unexplainably. I read a lot about how the Battery Saver works - requiring a minimal 40% SOC of the traction battery - it then periodically tops off the 12v Aux Battery. (I had previously allowed by traction battery to get down to around 20% before charging).

So at various times overnight, I get the Bluelink alerts about my doors being unlocked - which they are since it's securely parked in our garage. I get these alerts around 4 times per night (or day - when parked for a long time). The alert times seem to be every 4 hours. My thought/belief is that THESE are the times that the Aux Battery is getting topped. And if true, I believe that if I allow the SOC to get below some threshold (40% ? 35% ? 30% ?) that I will no longer receive those alerts and thus the Aux charging will no longer function.

Thoughts about this ? Am I on to something ? MY 2020 Ultimate
 
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