Rivian Math

[Duquesne]

Grab your calculators and tell me what I’m doing wrong. My battery tells me I have 190 miles of range, my navigation says I’m driving 129 miles. With Rivian math that means I have 30 miles of range left..

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[basserman]

I'm not familiar with that area, but in Southern California I get the exact same "funny math" when my route has a lot of elevation gain along the route.

 

[jjswan33]

It also looks at speed limits along the route. If you are going to be traveling at 75mph on the highway you won't get 190 miles of range.

 

[kylealden]

You don't fill your car with miles, and it doesn't consume miles.

You're seeing two things:

1. A dashboard meter that shows battery remaining under "typical" circumstances - more or less EPA test cycle. Think of this as your farmer's almanac, not your 3 day forecast.
2. A trip meter that shows your estimated consumption for this route - taking into account weather, elevation, speed limits, your actual usage so far, etc.

These are and virtually always will be different. The latter is more likely to be accurate for your drive.

 

[Craigins]

You don't fill your car with miles, and it doesn't consume miles.

You're seeing two things:

1. A dashboard meter that shows battery remaining under "typical" circumstances - more or less EPA test cycle. Think of this as your farmer's almanac, not your 3 day forecast.
2. A trip meter that shows your estimated consumption for this route - taking into account weather, elevation, speed limits, your actual usage so far, etc.

These are and virtually always will be different. The latter is more likely to be accurate for your drive.

Just an FYI, the navigation distance is ALWAYS way off for me, the driver side display is typically spot on. I just ignore what the navigation display says. It is a running joke on our road trips.

 

[kylealden]

Just an FYI, the navigation distance is ALWAYS way off for me, the driver side display is typically spot on. I just ignore what the navigation display says. It is a running joke on our road trips.

I guess this is what "Your mileage may vary" was designed for In my experience the nav display is within a couple of miles, even on 250+ mile trips, unless I'm speeding a ton or hypermiling a ton (or e.g. towing).

 

[Mathme]

The little mileage number on the driver display is the "guess-o-meter" and as others have said, it it a general prediction of how far you can drive on a charge. It takes nothing into account other than state of charge.

Meanwhile, the mileage in the Navigation is much more accurate as others have said it'll take into account elevation gain, weather, speed limits, etc.

Here's a good example. Last night when I left the Sacramento RAN station with 85% SoC, the guys-o-meter said the usual 247 miles. Punch in the address to my place in South Lake Tahoe, and the Nav says 83miles upon arrival (there's about 9,000 feet of elevation gain). Pull into the driveway, and it's at 84 miles.

Thus, if you want a good idea of your SoC upon arrival, always use the Nav.

 

[TD4PREZ2004]

You're in conserve mode. I believe the navigation doesn't currently take into account you're conserve mode (it thinks you are in all-purpose), hence a large part of the difference. I believe this is supposed to be addressed in the next OTA update.

 

[sub]

The little mileage number on the driver display is the "guess-o-meter" and as others have said, it it a general prediction of how far you can drive on a charge. It takes nothing into account other than state of charge.

No - it takes into account the drive mode. Switch between All purpose, Sport, Eco, Offroad, etc and the driver display range number will change significantly.

The manual also says that the driver display number takes into account recent driving history. But I have seen no evidence that it actually does this.

 

[Ingo B]

I was just thinking of this the other day. A 37 mile trip costs me closer to 52 per the charge-o-meter. Part of me wishes they could change units so it wouldn't be so confusing, but I also get why it is the way it is. Ultimately, I consider it part of the paradigm shift, along with killer acceleration, more time at stations, and no coasting.

 

[Dark-Fx]

The manual also says that the driver display number takes into account recent driving history. But I have seen no evidence that it actually does this.

I believe it will if you are typically exceeding the base rating. Not for coming in under it though.

 

[VSG]

I really don't understand the problem. This is not a math error, this is the way all cars work. In your ICE vehicle it shows you how much gas is in the tank and what your expected range is with that amount of gas. Your gas gauge doesn't know that the next 500 miles are uphill, or downhill, etc. so the gauge can only guess how far you can travel.

If the "miles" display on the dash confuses you, switch it to show battery percentage (or both percentage and miles). Because that's what it's really measuring - battery percentage, just like a gas gauge measures the percent of the tank that is full.

If you navigate to a location, the center display will show you how many "miles' you will have remaining when you get there, taking into account your route. I don't know how much elevation data etc. it uses for this calculation (it *does* consider the drive mode), but in my experience over many long road trips this is usually very accurate and adjusts continuously over the trip to account for differences between actual consumption and predicted consumption.

 

[diabolik]

If the "miles" display on the dash confuses you, switch it to show battery percentage (or both percentage and miles). Because that's what it's really measuring - battery percentage, just like a gas gauge measures the percent of the tank that is full.

Anyone know how to do this?

 

[VSG]

I was just thinking of this the other day. A 37 mile trip costs me closer to 52 per the charge-o-meter. Part of me wishes they could change units so it wouldn't be so confusing

You can change the driver's display to show battery charge level in miles (the default), in percentage, or in both percentage and miles (which is my preference). Go to Settings/Vehicle/Units and scroll to the bottom.

"miles" is just percentage times the EPA range in your current drive mode.

 

[carancpa]

I came across this the other day after experimenting with Cruise Control set at 70 mph and All-Purpose Drive. There are no chargers for 210 miles when I travel from Las Vegas to Tonopah Nevada which is elevation over 1 mile and lots of hills and valleys along the 2 lane highway. I charge to the fullest 100% possible and finally made it with 30 miles on the battery at my driveway. Please make more 350kWt chargers along Highway 95 in Nevada. This is the only way from Reno to Las Vegas. I am halfway point in Tonopah; ie the only North/South highway in Nevada. The first trip, I dragged into Goldfield (25 miles from Tonopah) at a private charger for $40 to raise battery to 40 miles and 2 hours of my time to make it home from the Las Vegas Service Center.

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