Battery saver mode but 12.5v

[inline_five]

Vehicle entered battery saver mode and would not let me remote start. I have a Bluetooth voltage monitor on the 12v and it showed 12.5v. Car was previously driven about 25 mins on the highway and sat for about 15 hours at an airport lot.

Curious why it would enter BS mode at that voltage?

Sponsored

 

[Mavster Mechanic]

Gremlins?

One of anything may just be an outlier.
See if there is a pattern.

 

[HeyBales]

Since the BMS response for Deep Sleep Mode (when modem is disabled per your notice) is based on it's readings - I've found my multimeter voltage reading at the battery is a tad higher than the battery sensor reading.

So your BT reading may have been 12.5 (that's when you came back to truck?), but it's reading was likely lower, and a glitch besides.
Because 12.1 is the initial battery saver items, but DSM is below 9.5 V.

I wonder if the BMS thought you hit below 40% SOC, since that's the other potential.
40% doesn't match with 12.5, or 12.1 for that matter.
But people have had drains before that got cut off after the 60-75 min when normal sleep mode on modules kicks in. Of course DSM killing the modem could have been the solution too.

So maybe you had a drain that caused the SOC to hit 39% during that initial period after shutdown, but either the modem disabled or other modules going to sleep stopped the drain.
And it recovered decently enough for what you saw on return.

Healthy battery!

Sponsored