Losing range on every drive??

[Yuda]

Hi everyone it’s my first post here.
let me know if it’s not allowed.

We have R1T 2023 quad-large pack looks like we’re loosing KM every drive.
when my husband drove it on highway it loose about 10-15Km each drive.
yesterday I drove local it lost 20km!!

for example, before departing we have 350km. After driven 15km distance. The range left is showing 320km only.

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[UnsungZero_OldTimeAdMan]

Temperature. Environmental conditions. Driving habits. All contributors to consumption rate. Check your tire pressures. Range is also a constantly changing projection, based on usage data. It’s a squishy reference, not a hard data point to be taken literally. Range and consumption estimates in gas burning vehicles work the same way.

And if you are not using high regen, and are still relying mostly on brakes to slow, you are not recovering as much energy as much as you could.

 

[mikehmb]

You're not losing range, the vehicle is identifying how much energy is being used in real terms and adjusting your remaining range based on those conditions.

This is common of all EVs that are smart enough to adjust remaining range based on current conditions.

This will fluctuate with temperature, driving behavior, speed, wind, etc.

 

[Laserboy1054]

As others have stated, it's not necesarily loss of range, it's an updated estimate. You _might_ be doing something (such as using friction brakes, as stated previously) that's costing range. Check your vehicle settings ("standard" height and "all purpose" conditions are usually bes--just go with vanilla unless there's a good reason to do otherwise), be sure your regen is set to "high" and that you're using "one pedal driving": with only a teeny bit of practice, you'll find that you almost never need to touch the brake pedal. (I used my brake yesterday when I overestimated how much time was left on a green light by a bit. It occurred to me that I hadn't touched that pedal in about two weeks.)

But, no matter what you do, the predicted range can't be more than an estimate. Omce you've driven the vehicle for a while, you'll get a sense of how far off it's likely to be. That's really important: if you trust the prediction too much, you're liable to get into a bit of trouble with charging. That's happened to me a couple of times. I thought I'd get to a charger with 100 miles of remaining range and only had 50 miles (predicted) left when I actually got to the charger. If there's an issue with the charger, you might find yourself with insufficient range to make it to the next one--that was very nearly my situation. So don't trust that number too much until you're "dialed in."

All this seems way scarier than it actually is. After all, old-school vehicles didn't have range prediction at all until relatively recently. The fuel gauge on a gasoline car was never terribly accurate. Your vehicle's state of charge is way more reliable than an old style fuel gauge.

I hope this all is helpful!

 

[KBabione]

All of the above, plus...

If you set a destination in the nav system you'll see two numbers:

• One showing the miles from where you are to your destination, and...
• One showing you the miles remaining when you get to your destination

A quick math check of your remaining distance on the driver's display makes you wonder why your Rivian can't do simple math. For example, the driver's display may show that you have a range of 200 miles, but the nav shows 60 miles to your destination and only 120 miles of range when you get there. It will true itself up as you get closer - I find it fun to watch my range creep up while driving. Had a bit of a panic a month ago when it showed my range to be 4 miles when we got to our charging destination but it was up to 16 when we finally go there.

You'll get used to it the more you drive it, and the folks on the forum are really helpful. Enjoy your ride!

 

[beatle]

This is the main reason I always ignore remaining range and why I changed the cluster to display percent remaining. I wish the destination estimate could also be given in percent. I get that people want to be reassured that they're not going to run out of battery, but the estimated remaining range isn't realistic or really useful since it has no idea where you're planning to go or what the conditions will be.

 

[Andystroh]

Yeah… unfortunately “miles” (or km) is doing a lot of different types of work here. I don’t love miles being substituted for battery state of charge.
Miles#1: actual distance you drive
Miles#2: approximation of the battery remaining, based on historic driving habits. Displayed in front of driver
Miles#3: anticipated battery usage for the route in navigation, based on road conditions

all three of these will be different. So to drive 100 miles, it may tell you it will take 120 miles, and your battery may end up dropping by 100-130 miles…

 

[sdemeester]

Safest to never believe the initial range since in my experience it is never realistic and true range is always less, how much less depends on all the things mentioned above, but just plan on it being less by some percentage (much less when going 75+ mph, cold weather, towing etc)
Which means always charge above what you think you might need! If I think a 70% charge is enough for a round trip of about 150 miles, I will go to 85% to give cushion, and more often than not without the cushion I would have been looking for a charger. And be sure to use conserve mode on the highway, it really helps. You will get the hang of it.

 

[Donald Stanfield]

What is your battery temperature when starting out? The lower it is, the more you will lose if the vehicle has been sitting outside.

 

[TwelveVoltMan]

Miles#2: approximation of the battery remaining, based on historic driving habits. Displayed in front of driver

I believe this number is just the EPA rated range of the battery correlated to state of charge, not something that considers your historic efficiency

 

[mudito]

I call it "Rivian's Math"... ;-)

 

[SPITmadFIRE]

I do love these posts because OP almost never comes back to confirm the ambient or battery temperature when almost certainly they start every drive cold and end every drive warm and wonder where all those kilowatt hours went

 

[cjust2006]

Lots of long answers here. You use km, I assume you're in Canada. It's cold. I think that's your explanation. Nowhere near as bad in the summer.

 

[Laserboy1054]

I do love these posts because OP almost never comes back to confirm the ambient or battery temperature when almost certainly they start every drive cold and end every drive warm and wonder where all those kilowatt hours went

I'm a Physics professor. One of my favorite lectures is to begin with a (hypothetical) car wreck. Then we move back in time, at each step asking "where did the energy come from? where did the energy go?" All our cars are fusion powered! But there's various amounts of waste depending on the path that ultimately ends with the wreck.

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