Rivian Math

[goldburger]

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

We’ll see— I put some AT’s on 20” wheels (33” tire size) and after 500 miles my efficiency is down just over 10% but my guess-o-meter on the driver display hasn’t changed from when I had 21” AS tires. The service center reminded me to reset the driver history which I just did, so will report back!

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[frogblast]

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.

fortunately when supercharger access is enabled, there is one in Beatty at the halfway point of your drive.

 

[MoreTrout]

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.

My experience has been 100% the opposite of this, especially in the summer. I regularly drive a ~200 mile route a couple of times a month. The navigation ALWAYs predicts about 40-50 miles less than what I have on arrival, and won't even calculate it when I remove an unnecessary charging stop it wants me to make. I actually usually arrive with even more miles left than the simple math result of the (guessometer - actual route miles) would predict. In the winter the nav gets a little closer to reality, but still almost always underestimates how much I actually have left. And IIRC, the navigation on this route predicted the same result in the summer or the winter, so it certainly isn't factoring in weather (yet). And it predicts the same going both ways, so doesn't appear to factor in elevation either.

IMO the nav is the most inaccurate option and IS NOT taking into account weather, elevation, speed limits, etc. ----yet. I think that's the plan, but right now it is just an extremely conservative worst case guess based on total miles that occasionally gets lucky based on driving habits and actual elevation changes.

 

[azbill]

My experience has been 100% the opposite of this, especially in the summer. I regularly drive a ~200 mile route a couple of times a month. The navigation ALWAYs predicts about 40-50 miles less than what I have on arrival, and won't even calculate it when I remove an unnecessary charging stop it wants me to make. I actually usually arrive with even more miles left than the simple math result of the (guessometer - actual route miles) would predict. In the winter the nav gets a little closer to reality, but still almost always underestimates how much I actually have left. And IIRC, the navigation on this route predicted the same result in the summer or the winter, so it certainly isn't factoring in weather (yet). And it predicts the same going both ways, so doesn't appear to factor in elevation either.

IMO the nav is the most inaccurate option and IS NOT taking into account weather, elevation, speed limits, etc. ----yet. I think that's the plan, but right now it is just an extremely conservative worst case guess based on total miles that occasionally gets lucky based on driving habits and actual elevation changes.

I agree with this, the nav is not accurate, always way too conservative. Just did Tahoe to Phoenix and always arrived with more than the nav told me I would. As I got close to arrival it would finally adjust Upward

I did a 211 mile leg from Barstow to Kingman, and the truck could not estimate a target charge at Barstow to get me there. Wanted me to stop at EA. My guess was 85% to get me there with 15% margin. All along the way, until I got to within 30 miles of Kingman, it kept telling me I wold be out of battery. Finally it decided I would have 15 miles.

I arrived with 14% battery and 40 miles displayed range. The nav display did not adjust to the driver display until I was within 15 miles of Kingman.

 

[Craigins]

I'm glad the last 2 responses means my truck isn't messed up.

I just did a road trip, first leg:
Drivers display range: 231

According to nav:
Trip distance: 145
Miles remaining: 59, 30 miles into the trip, dropped to 46.

Arrived at destination with 90mi remaining.

The worst part was the last leg of the trip. I had to cancel nav as it kept trying to reroute me to a charger and started "preconditioning" the battery. It didn't think i could make a 90 mile distance (mostly 55mph speed limit) with 150 mi of range.

Complete garbage.

 

[CharlieS]

I am sorry the Rivian does not have Apple Car Play. Using Apple Car Play to navigate in my Mustang Mach E is pretty darn accurate. Car Play sync's up nice with the Mach E electronics to provide really good information. Car Play estimates are a bit pessimistic, for each 100 miles on a trip Car Play thinks I'll use 2 or 3% more battery than it does take. However, I prefer that to an optimistic calculation and having spare battery remaining at my destination.

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