SOC behavior - Gen1

[tate16t]

I completed a charge at home to 80% at 3amEST on Mar 27th. I unplugged around 10am and haven’t driven since charging. I noticed after a charge the vehicle tends to hold the SOC for two days or so. The normal vampire drain does not occur until after the next drive or two or three days later if not driven. I happen to check Home Assistant earlier this morning and noted the SOC was 80.1% (as noted by the pic below). I also noticed the SOC spikes. I cannot show the SOC before Mar 27th 11am since there were problems with the Rivian Home Assistant integration. But, you can see the SOC spike at 8:30pm to 80.8% and the drop and spike again today at 11:30am to 81.8%. I witnessed this behavior in the past but did not post about it.

Maybe this is Rivian trying to address vampire drain?

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[KBabione]

Stupid question for you - was it still plugged in after it hit 80%? I don't understand how you could have negative vampire drain (going from 80-81.8). We were gone for two full weeks but I left our '23 R1S plugged in and set to 70%. I haven't set up the HA integration, but wasn't surprised that it was at 70% when we got home.

 

[tate16t]

No, it wasn’t plugged in but good point I forgot to mention I unplugged it Mar 27th morning. The SOC gains are all without being plugged in.

 

[Dark-Fx]

Probably temperature related where the percentage available remains the same even when there is some actually being used.

 

[tate16t]

Probably temperature related where the percentage available remains the same even when there is some actually being used.

I immediately thought temperature too, however it was 30°-57°. Today is a bit cooler though, 26° overnight with a high of 43°.

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