Any tests done on Vampire battery drain?

[Craigins]

I put it into shipping, tire change, and car wash mode. Luckily I am home sick today so I can actually let the truck sit for a day.

does that set it to the lowest suspension?

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[Dark-Fx]

does that set it to the lowest suspension?

Stops adjustments from happening.

 

[Max]

I was once out of the country for over 90 days in a row for work. Car started up fine when I got back. Wasn't an EV though.

I can't leave my wife's 8 year old Subaru sitting as long as I can leave my 19 year old Nissan. So even with ICE it looks like the more tech the more power loss.

 

[Ainsleyiv]

Charged to 70% overnight last Monday, 190 miles. Haven’t left the garage in CLT NC in the past week, current status 43% and 120miles.

 

[Dark-Fx]

I put it into shipping, tire change, and car wash mode. Luckily I am home sick today so I can actually let the truck sit for a day.

So, cameras are still warm in shipping mode after ~23 hours. Truck had some sort of a fan running in the frunk area. It's below freezing out right now, cabin was cold. Unplugged when the truck was at 70%, this morning it was down to 62%. Definitely something wrong with Rivian's software to cause that much vampire drain. Hoping it's just a software regression and fixing it will be easy.

 

[Riviot]

So, cameras are still warm in shipping mode after ~23 hours. Truck had some sort of a fan running in the frunk area. It's below freezing out right now, cabin was cold. Unplugged when the truck was at 70%, this morning it was down to 62%. Definitely something wrong with Rivian's software to cause that much vampire drain. Hoping it's just a software regression and fixing it will be easy.

Okay, this is getting out of hand. 8% is huge! Why are the cameras still running if they're disabled? Has anyone done this sort of FLIR test on a Tesla?

The mystery fan has been heard by many, including myself on this chilly morning.

 

[Zybane]

I am curious about this issue too. I took delivery of my R1T and went on vacation for 8 days and left it unplugged. When I left my range was 150 miles, and when I came back it had decreased all the way down to 28 miles. No gear guard, and no, climate system running as far as I could tell. Anyone else have the same experience?

Whoa that is really bad.

 

[zefram47]

I sure hope they get this under control and soon. It basically renders leaving the truck at the airport or a trailhead a "really bad idea (TM)", forgetting the calculations someone made suggesting an additional cost of upwards of 2900 kWh/year just sitting parked. For reference, all the driving I've done in my MINI Cooper SE since Feb 2021 is around 2900 kWh or close to 10k miles.

 

[Forager]

I sure hope they get this under control and soon. It basically renders leaving the truck at the airport or a trailhead a "really bad idea (TM)", forgetting the calculations someone made suggesting an additional cost of upwards of 2900 kWh/year just sitting parked. For reference, all the driving I've done in my MINI Cooper SE since Feb 2021 is around 2900 kWh or close to 10k miles.

4% loss per day (seems to be the “best” case at the moment):

.04/day*135kWh*365 Days = 1971 kWh/year

8% loss per day (seems to be a common upper end loss):

.08*135*365 = 3942 kWh/year

In context, the average US home consumes 10,715 kWh/yr. This doesn’t include any charging losses, so add on another 5% and you are well over 2000kWh/year at the low end

https://www.eia.gov/tools/faqs/faq.php?id=97&t=3

 

[zefram47]

4% loss per day (seems to be the “best” case at the moment):

.04/day*135kWh*365 Days = 1971 kWh/year

8% loss per day (seems to be a common upper end loss):

.08*135*365 = 3942 kWh/year

In context, the average US home consumes 10,715 kWh/yr. This doesn’t include any charging losses, so add on another 5% and you are well over 2000kWh/year at the low end

https://www.eia.gov/tools/faqs/faq.php?id=97&t=3

I was estimating at 6%. But the point stands that 2000-4000 kWh/yr just for the truck to sit still is ridiculous. Another data point... To drive the truck 12k miles at 2.1 mi/kWh is 5700 kWh. That certainly makes the vampire draw look a hell of a lot worse from a cost and efficiency perspective.

 

[jjswan33]

4% loss per day (seems to be the “best” case at the moment):

.04/day*135kWh*365 Days = 1971 kWh/year

8% loss per day (seems to be a common upper end loss):

.08*135*365 = 3942 kWh/year

In context, the average US home consumes 10,715 kWh/yr. This doesn’t include any charging losses, so add on another 5% and you are well over 2000kWh/year at the low end

https://www.eia.gov/tools/faqs/faq.php?id=97&t=3

Put another way a R1T with EPA range estimates would do ~2.5 mi/kWh. Based on 12k miles/year that would be 4800 kWh.

Factor in nominal 2000 kWh of parasitic loss and your efficiency drops to 1.76 mi/kWh. If my math is correct that equates to a MPGe of around 50… not great

 

[CommodoreAmiga]

Put another way a R1T with EPA range estimates would do ~2.5 mi/kWh. Based on 12k miles/year that would be 4800 kWh.

Factor in nominal 2000 kWh of parasitic loss and your efficiency drops to 1.76 mi/kWh. If my math is correct that equates to a MPGe of around 50… not great

EPA estimate is 480W/mi (2.083 miles per kW), so 12k miles driven would be 5,760kW. With +2,000kW vampire drain for the year you'd be 7,760kW for 12k miles, or an efficiency of 647W/mi (1.547 miles per kW) -- greater than 35% increase.

I get 70.2 mpg-e using EPA estimate and 52.1 mpg-e including vampire drain.

Odd that we have considerably different miles-per-kilowatt but arrived at similar mpg-e numbers.

 

[jjswan33]

EPA estimate is 480W/mi (2.083 miles per kW), so 12k miles driven would be 5,760kW. With +2,000kW vampire drain for the year you'd be 7,760kW for 12k miles, or an efficiency of 647W/mi (1.547 miles per kW) -- greater than 35% increase.

I get 70.2 mpg-e using EPA estimate and 52.1 mpg-e including vampire drain.

Odd that we have considerably different miles-per-kilowatt but arrived at similar mpg-e numbers.

I just took 314 miles of range / 125 kWh usable battery to get the 2.5 mi/kWh

 

[CommodoreAmiga]

I just took 314 miles of range / 125 kWh usable battery to get the 2.5 mi/kWh

ah. EPA numbers include charging losses.

 

[Riviot]

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