Standby test for parasitic loss while R1T unused and unplugged

[Jiri]

I will keep you all updated as the car sits another couple of days. So far I am not too worried about it. Also important to note that the battery is warm when you part. So first shot is batter immediately after being parked. Then it cools etc. it does seem like the loss is slowing down some. Stay tuned.

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[Lsthrz]

I will also throw in that since turning off the phone unlock function, drain seems to be changing from ~ 4mi overnight to about 2 mi. None of this is scientific, but 4 felt like a lot for an overnight.

 

[Craigins]

I will also throw in that since turning off the phone unlock function, drain seems to be changing from ~ 4mi overnight to about 2 mi. None of this is scientific, but 4 felt like a lot for an overnight.

Does the vehicle report kWh instead of miles?

Trying to use miles on the GOM is not a great estimate of power drain.

 

[ironpig]

Looks Like there is a software updated that addresses the issue:

 

[KurtP]

Seems that there is a new firmware update released today that improves/reduces battery drain while the car is sleeping.

https://www.rivianforums.com/forum/...date-improved-charging-speed.4528/post-126741

So I hope we see more improvement to battery drain in this as well as subsequent firmware updates.

 

[ajdelange]

When the truck is parked there is still quite a bit going on. Among other things it will be pinging the mother ship periodically to see if any instructions are being sent to and and it may be reporting things like battery SoC so that information will be available to you via the app(s). These communications use the cell phone modem and the amount of power it takes depends on how far from the nearest tower one is. Thus there can be variation in the amount of phantom drain.

For example, my ModelX X draws on average 177W which amounts to 4% of the battery per day. But much of that is taken by two external apps which poll the vehicle from time to time via the API. These provide logging of trips, charges and battery health. AFAIK there is nothing similar for the Rivians at this time (but I hope there will be). Absent those a couple % per day does not seem unreasonable at all.

 

[CommodoreAmiga]

When the truck is parked there is still quite a bit going on. Among other things it will be pinging the mother ship periodically to see if any instructions are being sent to and and it may be reporting things like battery SoC so that information will be available to you via the app(s). These communications use the cell phone modem and the amount of power it takes depends on how far from the nearest tower one is. Thus there can be variation in the amount of phantom drain.

For example, my ModelX X draws on average 177W which amounts to 4% of the battery per day. But much of that is taken by two external apps which poll the vehicle from time to time via the API. These provide logging of trips, charges and battery health. AFAIK there is nothing similar for the Rivians at this time (but I hope there will be). Absent those a couple % per day does not seem unreasonable at all.

Cell phones “ping the mother ship” all day long. They use a fraction of the power.

 

[ajdelange]

Because they transfer a fraction of the info. Eb/No: i.e.. the energy required is proportional to the number of bits. Also, communication is only part of the housekeeping load.

 

[CommodoreAmiga]

Oh, sorry, I didn’t see the username before I posted. Of course you’re talking authoratatively about things you know nothing about.

 

[ajdelange]

No, I worked for many years on radio communications systems. The fact that you evidently don't understand what is being said is no reflection on my authority.

 

[nc10]

Just remember, 6% is 8 kWh. That's not a small amount.

I like seeing all the datapoints here. Put in context, the average home uses ~ 1000 kwh/month, or 33 kwh/day. A R1T could add ~~10% to your home electric bill before driving a mile. (I'd guess most Rivian owners will have homes a bit larger than average, so maybe less.) If you are charging at public stations, that will cost ~ 100+ kwh/month X $0.35/kwhr = $35+/month or $420+/year. $10-$20/month that if you charge at home. Essentially a "1 full charge a month" hit to charging costs and battery lifetime. Not a "make or break", but not trivial.. Hope its something Rivian can work down.

https://www.utilityhacker.com/what-is-the-average-kwh-usage-per-month-in-the-us/

 

[bael]

Great to see more updates! I unplugged Saturday at roughly 4p eastern. It charged to 72% even though was supposed to stop at 70. Had phone around for 12 hours prior to leaving in a garage - temps “normal” for the south in a garage. It’s down to 62% at roughly 6p on Wednesday. So about 4 full days and about 10% loss. Will have to see another time what the sleep changes do.
I have noticed that while it sleeps itappears to disconnect from WiFi and then will pop back on - maybe it was waking too frequently

 

[Craigins]

Cell phones “ping the mother ship” all day long. They use a fraction of the power.

Aj does qualify power usage is proptional to the distance to the tower. When I'm in northern wi, my cellphone will die in like 3-4 hours when i have 1 bar of signal. This is a real thing.

Also the amount of data transmitted will affect it as well.

So if you park in a well shielded garage and don't have the truck on wifi, you're just wasting power.

It is part of the drain, but not all the drain. However it could be significant if they are sending gigs of data nightly.

 

[CommodoreAmiga]

Aj does qualify power usage is proptional to the distance to the tower. When I'm in northern wi, my cellphone will die in like 3-4 hours when i have 1 bar of signal. This is a real thing.

Also the amount of data transmitted will affect it as well.

So if you park in a well shielded garage and don't have the truck on wifi, you're just wasting power.

It is part of the drain, but not all the drain. However it could be significant if they are sending gigs of data nightly.

Cell phone batteries are small. The amount of power the rivian is burning is a LOT.

 

[ajdelange]

I think that many people don't stop to appreciate that an average draw of a lousy 10W being used by the vehicle for watchdogs, modems, transceivers... amounts to a quarter of a kWh per day.

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