4.01 kWh club

[jimmyb2]

I've never seen over 4.01 even when in constant regen for 15+ minutes. It seems to cap the display there (at least for me/my driving modes). The "true" efficiency should be ∞ mi/Wh

Not sure I explained good enough. I am talking about comparing the 15 minute graph to the details you see when “clicking” on the trip counter. Do the trip counter details also get cut off or max out at 4.01 mi/kwh?

Trip counter is under “Settings/About” where there are counters for “Trip A” and “Trip B”.

I would reset one of the trip counters to zero, then begin my downhill drive/coast for at least 15 minutes (probably go for 18-20 minutes) to max out the 15 minute trace, then stop to check the details on the trip counter I had set to zero. Does it also show 4.01 mi/kwh just like the 15 minute graph on driver display?

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[PappaBolt]

I usually live below the bar. Uphill in both directions.

 

[bhopkins]

Here’s my perfect green picture. Note that I only go 4.0. This was from last summer going from the top of Cottonwood Pass (Colorado) down into Gunnison area. Looks like there’s been a software change from last to this summer so that folks now get 4.01.

 

[mpw81]

Last July, from the top of Mt Evans/Blue Sky (14,130') to home with a stop for lunch in Evergreen.

 

[goldburger]

Last July, from the top of Mt Evans/Blue Sky (14,130') to home with a stop for lunch in Evergreen.

Bananas.

my truck used 6 kWh just waking up this morning lol.

 

[azbill]

I have gotten 4.01 several times. Also have been put into regen jail going down long hills.

I think this is pretty good efficiency, Tahoe to Phoenix in good weather conditions.

 

[BigSkies]

I had mine capped at 4. I seem to remember 4.0, but maybe it was 4.1.

My range was at 152 when I was at the top of Berthoud pass (CO), and got all the way down to 151 miles when I crossed I-25 roughly 60 miles away. So my quick mental math puts that at around 120 miles / kWh for that stretch of the drive.

 

[W1SE]

Here I was feeling damn good about seeing mid-3's this past weekend as I was trying to ration electrons on a road trip through a charger desert.

I’m not sure in my 3 months I’ve seen 3

2 things
1. the total average of the whole trip (the up hill too) is probably 1.8-2.4. So the up hill I only acheive 0.9-1.2. So it’s not like the truck is gaming the system.
2. You need a long stretch of down hill. Here in the west it’s all mountains outside the city. Much harder to do in Florida. Haha

 

[cbrcanuck]

I am curious. If you do a section of road where you reach this maximum on the 15 minute graph what do the trip details show? Obviously, you actually probably exceeded 4.01; so do trip details show 4.01 or something greater.

Of course, you would have to reset the trip details immediately before beginning the downhill drive/coast.

I would test this myself except no nearby mountains, unfortunately.

I was curious about this too. Did a mini test today. 12km hill (Mount Seymour, North Vancouver). Tested up and down the exact same stretch, it wasn’t a full 15 mins but shows some interesting data. Summary result - it looks like the trip data more or less ignores the time you spend in regen. My climb averaged 1.1 km/kWh (real). The descent (in regen the whole way except a couple of hairpin corners for a few seconds) shows 2.27 km/kWh (obviously way off as I added a bunch of range on the way down). The air was on and it would have been cooling the battery with so much regen, so I think it calculated based on how much energy was used in the very little time when not in regen and ignores the rest. So, not useful for small distances with any significant downhill.

first two pics = up
Last two = down

 

[cbrcanuck]

Also interesting how much power it used on the descent (5.3 kWh). Maybe a lot of battery cooling necessary? I forgot to note how much range/% I used and gained, unfortunately. I think 10% ish added on the down. So maybe 13 kWh added into the battery? Anyone smart enough to know if it would be 18 kWh of energy gained total to descend 800m elevation?

 

[jimmyb2]

Also interesting how much power it used on the descent (5.3 kWh). Maybe a lot of battery cooling necessary? I forgot to note how much range/% I used and gained, unfortunately. I think 10% ish added on the down. So maybe 13 kWh added into the battery? Anyone smart enough to know if it would be 18 kWh of energy gained total to descend 800m elevation?

Your test data is interesting. I’m not sure I understand the “whys” behind the numbers. Have to give this more thought.

This is a start towards understanding the different distance/kwh data sources in the vehicle … appreciate you taking the time to do this.

 

[MountainBikeDude]

I was curious about this too. Did a mini test today. 12km hill (Mount Seymour, North Vancouver). Tested up and down the exact same stretch, it wasn’t a full 15 mins but shows some interesting data. Summary result - it looks like the trip data more or less ignores the time you spend in regen. My climb averaged 1.1 km/kWh (real). The descent (in regen the whole way except a couple of hairpin corners for a few seconds) shows 2.27 km/kWh (obviously way off as I added a bunch of range on the way down). The air was on and it would have been cooling the battery with so much regen, so I think it calculated based on how much energy was used in the very little time when not in regen and ignores the rest. So, not useful for small distances with any significant downhill.

first two pics = up
Last two = down

Hahaha I did a spirited sport mode rip up Cypress at 530am this morning. From base to top was 14km and 11.1kWh used.

Way down was back to 9.5kWh, or 1.6 recouped on the decent.

Managed to hit 6.29km/kWh by the time I hit Park Royal.

Sport mode in the quad, on a windy, slightly damp road is a heck of a thing!

Edit*

On a side note, the Settings>Vehicle>About>trip B is a great way to track your real-time data. Keep in mind however, it doesn't go into negative kWh's used, so try to ensure if you're testing the energy use/gains, to reset it prior to a hill climb etc, so you can see power gained back via regen on a decent.

 

[cbrcanuck]

Hahaha I did a spirited sport mode rip up Cypress at 530am this morning. From base to top was 14km and 11.1kWh used.

Way down was back to 9.5kWh, or 1.6 recouped on the decent.

Managed to hit 6.29km/kWh by the time I hit Park Royal.

Sport mode in the quad, on a windy, slightly damp road is a heck of a thing!

Edit*

On a side note, the Settings>Vehicle>About>trip B is a great way to track your real-time data. Keep in mind however, it doesn't go into negative kWh's used, so try to ensure if you're testing the energy use/gains, to reset it prior to a hill climb etc, so you can see power gained back via regen on a decent.

530? Early riser! And a lot quieter than the motos that rip around early

 

[moosehead]

Not the left hand screen, but overall got to 6.3 kWh on descent from 11.3k' Berthoud Pass, CO to Denver circa 5680k'.

 

[jemkewl]

Not the left hand screen, but overall got to 6.3 kWh on descent from 11.3k' Berthoud Pass, CO to Denver circa 5680k'.

57.1 miles / 6.3kWh = 9.0364 miles/kWh

With the obvious out of the way...

Would be interesting in hearing from Rivian :
1) miles are from GPS, wheel rotation, combination, something else?
2) total energy is nominal energy from battery drain, net battery drain (regen), motor consumption only, something else?
3) Are the trip meter and 15 minute graph using the same math and variables?

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