Displayed Range - Anything more than just converted from percentage?

[picklebill]

Hi All -

Relatively new Rivian R1S owner here.

I come from driving a Tesla for the last 7 years.

My R1S is equipped with the 20" AT Dark wheels. According to Rivian that configuration has a range of 289 miles. I have not yet charged it to 100%, but at 85% it shows 239, which works out to 281 at 100%.

In my Tesla, it seemed that the "rated" range on the dash was just a straight conversion from battery percentage or kWh remaining. They had a "reference" consumption of 300 Wh/m or whatever, so regardless of weather or past range, that's the number that was displayed. If you were using the nav, it would make adjustments to that to predict your arrival state of charge, but the range on the dash was always that "rated" number.

Do Rivians work the same? Does the "rated" range on the dash take into account wheel configuration? Weather? Past use? The charging screen in the vehicle seems to suggest that it uses past data to calculate, and if my range is 281 at 100% I sure hope it's assuming the AT tires.

Thanks for any input you have!

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[evguy]

As far as I can tell after 5,000 miles, it works the same as the Tesla - displayed range is just the EPA estimate applied to the % of battery remaining.

Since the December software update, my 100% displayed range has crept up from about 278 to 289, consistent with the new EPA estimate on AT wheels.

 

[Andystroh]

I do not think it is similar to Tesla. Although. I will say, this most recent update, and the one rolling out now, both change range and range calculations in some way, so its hard to say.

Originally, it seemed to be fixed at about what the EPA range stated. After 10k miles I saw no change. Then in the most recent software update, my range creeped up about 10%, although I did not see a change in efficiency (actually its been lower because of cold weather), and there was no stated change in usable battery.

This update rolling out now states a change in usable battery, but I haven't received it so it is unclear if it's catching the usable battery up to the new estimate that the last update provided (which does not seem to be consistent across trucks), or if it is a separate change entirely.

Right now - I would say it's kind of uncertain. Prior to this update, most evidence pointed to about 128kWh usable capacity. My average efficiency on long drives did not match up to the most recent estimates my truck has been giving (2.0mi/kWh -> 256 miles, while my truck is displaying like 305 in all purpose). It also does not match the EPA (2022, I should be around 270 with 20" wheels, 2023 estimate is 289).

Prior to the last update, I did feel like the range was a really good estimate of the actual range of the truck (at least in the summer). With the last update, it feels like it is grossly overestimating range. With the current rolling out update, we will have to see.

EDIT: Just wanted to add Rivian states they will change your range based on your driving habits, which is also a departure from Tesla's method. With my truck's current software version the range only adjusts as I use the mode (e.g. I have not used conserve much so it is lower than all-purpose. When I do use it, it creeps up each time).

 

[picklebill]

consistent with the new EPA estimate on AT wheels.

I assume that people with different wheels show different rated range? So if I switch from 20" to 21", Rivian would update the internal configuration?

I suppose if I switch from 20" AT tires to some other all-season tire with higher range, they're not going to update that and I'll still show AT range.

 

[evguy]

I assume that people with different wheels show different rated range? So if I switch from 20" to 21", Rivian would update the internal configuration?

I suppose if I switch from 20" AT tires to some other all-season tire with higher range, they're not going to update that and I'll still show AT range.

Correct

 

[Tbirdjeff]

in the FWIW column, I have 22" wheels and my estimate at 100% has gone up to 332, usually from about 305.

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