Trailer left connected maintains Rivian's 12V battery?

[Dark-Fx]

Boondocking one night. Should I unplug the 7-pin overnight from the vehicle? Seeing different viewpoints on this question.

I was in my trailer working on the battery system for a few hours last night. Had the battery disconnects thrown off. Truck was still happily powering the camper the whole time, running lights and the fridge, since the 12V input off the 7 pin is directly wired into the 12V system on the trailer.

Voltage didn't seem to drop enough for it to be problematic on the vehicle side, but I also wasn't monitoring it that closely nor what energy the truck pulled out of the HV pack. I did periodically notice the lights suddenly getting brighter, which means the truck kicked the 12V charging system on.

If maintaining range is your primary motivator for unplugging, definitely do it.

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[HyperionMark]

I was in my trailer working on the battery system for a few hours last night. Had the battery disconnects thrown off. Truck was still happily powering the camper the whole time, running lights and the fridge, since the 12V input off the 7 pin is directly wired into the 12V system on the trailer.

Voltage didn't seem to drop enough for it to be problematic on the vehicle side, but I also wasn't monitoring it that closely nor what energy the truck pulled out of the HV pack. I did periodically notice the lights suddenly getting brighter, which means the truck kicked the 12V charging system on.

If maintaining range is your primary motivator for unplugging, definitely do it.

Makes sense. I noticed this behavior on our Model X when I towed with it as well. There was no battery in the system and the vehicle still powered everything 12V.

My night was successful. I did leave it plugged in (7 pin) but did put it in camping mode which turns off energy to the trailer if it is in the right mode. It seems to me that camping mode changed slightly and maybe upgraded since I camped last season. When you choose for it to turn everything off it does seem to put it into a very very low power mode, even requiring a few seconds before startup again (might be worth trying at home for vampire drain).

 

[Foobar]

I usually unplug overnight because I presume the Rivian will continue to feed the trailer's batteries and I'd rather the Rivian keep its energy for the trip. I haven't done enough experimentation to see how much actually moves between the two, so maybe this is overreacting, but I usually disconnect overnight because I want to level the trailer anyway. I don't like sleeping on an angle.

 

[HyperionMark]

Update to my boondocking overnight:
I just remembered that the camp mode where you can have everything turned off does indeed turn off electric to the trailer. The reason I know this is because I have a battery monitor on the trailer and the percentage went down all night long.

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