9mo efficiency check-in on the 2025 Gen 2 Dual Large - TL;DR surprisingly bad

[iamnid]

I don't know what you all are up to but I'm getting under 2 miles/kwh.

I'm in the standard pack R1S and here is a screenshot of the 1 year and approx 9,500 miles I've traveled.

I should note this is in sunny SoCal, so weather shouldn't be an issue.

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[carsly]

Tesla doesn't account for all energy usage, like phantom drain or sentry mode in it's trip data like Rivian does. That's likely the reason you're seeing better efficiency overall in your Tesla.

I think that's definitely a contributor. But I've also done 185 highway miles at a stretch in the Cybertruck AWD on 35" all terrains and used just under half the battery equating to a tick over 3 mi/kwh. No aero advantage for the Cybertruck vs. the R1S I'd think and the tire advantage would definitely be in the Rivian's favor.

 

[carsly]

Not that it is the culprit here but you claim you are within 1 psi of factory specs for the 22” wheels but your video shows 45psi which is lower than the factory recommended 48psi.

Good catch!

It was a cold morning here in NJ. 30+ at night and 60 during the day so I haven't yet adjusted my tire pressure for Fall. On the list for this weekend. I typically adjust every 6 weeks or so whenever the temps steadily swing more than 10 degrees in one direction or another.

 

[kurtlikevonnegut]

The trip calculator includes idle battery usage. If you use climate hold or precool or heat your cabin at all it will drive your efficiency according to your trip calculator down significantly.

Example, on my drive to work I'll be at 2.8kwh or so when I park, but running climate hold and using climate scheduling by the time I get ready to leave work my trip efficiency will be at or below 2.0.

TL;DR, the trip calculator isn't good for long term efficiency calculations.

 

[riverie]

the trip calculator isn't good for long term efficiency calculations.

I agree 100%. Plus there was a stretch of time where it was not calculating correctly at all. I keep a spreadsheet.

And other than it's a fun number to know, having that number doesn't affect my behavior.

When I charge at home the efficiency doesn't really matter that much.

On a trip, I just need to know when I need to charge. And my highway efficiency is different than my day-to-day around town numbers.

 

[MountainBikeDude]

I think that's definitely a contributor. But I've also done 185 highway miles at a stretch in the Cybertruck AWD on 35" all terrains and used just under half the battery equating to a tick over 3 mi/kwh. No aero advantage for the Cybertruck vs. the R1S I'd think and the tire advantage would definitely be in the Rivian's favor.

What was the Rivian on the same stretch/conditions? Just curious.

If you're going to compare an apple to an orange, they should at least be in the same basket.

Also, to be totally impartial, I would honestly expect the cybertruck to be more efficient, otherwise it wouldn't say too much for Tesla's powertrain investments to date.

 

[SeaGeo]

As couple of other folks noted, there was a bug on Gen2 builds on 2025.22 that had energy usage wildly incorrect. it was fixed in 2025.26. When I say bad, I mean like.... more than shifting a decimal in the wrong direction incorrect. The vehicle said I used more than a max pack of energy to drive about 20 miles that month.

https://riviantrackr.com/2025-26/

 

[Riviot]

Not that it is the culprit here but you claim you are within 1 psi of factory specs for the 22” wheels but your video shows 45psi which is lower than the factory recommended 48psi.

@carsly if your video is showing 45psi in the morning, that's actually a reading from warm temps and driving the day before when you pulled in the garage. Rivian, and all TPMS, displays the last reading received. These are only fed after driving for a minute or so. A few things going on here...
1) Recorded psi is highest after driving the warmest part of the day, telling me your cold psi is way below
2) Rivian TPMS readings are generally 2-3 psi below reality

Get a compressor and a tire pressure gauge.

Check PSI at each wheel in the morning before leaving.

Fill to 48psi before driving.

 

[HaveBlue]

My lifetime efficiency for my DM Gen 1 over 16000 miles is 2.5 mi per kwh. About 1% of that is towing or offroading.

 

[MPGator]

@carsly this is where having something like ElectraFi subscription is really nice to help figure things out. You can see how much energy is used during drives, sleep, and park. I’d recommend it, even if just for the 7 day trial, to get a better understanding of your specific situation.

 

[eddysales001]

Never towed. I do have persistent red cloud/connectivity issues despite the vehicle sitting within 10 feet of one mesh router and 20 feet from another. My Tesla is actually on the far side of my driveway from the house and it has no such issues. Feels like something is definitely amiss. Maybe it's never sleeping? But then it always seems to be asleep when I try to remote activate climate/pre-condition and it never wakes up. Open to suggestions.

I have commented on the poor WiFi connectivity. My R1s sits very close to my wall charger and the wall charger has no problem connecting to the 2.4 GHz wifi channel. While I recognize 5 GHz does not penetrate as well as 2.4 I even went the route of reconfiguring my router to have a separate 2.4 and 5 GHz SSID so I can purposely force the R1S to the 2.4 channel and results were pretty much the same. Mentioned it to the mobile service tech on his last visit and pretty much shrugged his shoulders. I specifically asked what tools they have to see if the WiFi strength is in spec and really did not get a response. .

 

[SwampNut]

This is with a LOT of cabin cooling including dog mode for hours in summer. Some towing and some cargo. I run 45 psi on 116 load range AT tires.

 

[JacobAZ]

Others have already said this in pieces ... Just putting it all together. This summer something happened on an update which added a lot of KWH to stored trip data making calculations way off. In my case about 8,000 kwh used were added overnight. It was a onetime event. The trip meters must be reset to remove the error. Second point is Tesla and Rivian do not track KWh on trip meters the same. Tesla is only using KWH while actually driving the vehicle. With Rivian when driving to a destination the calculations are good. But when no trip destination is entered Rivian appears to be adding up all the KWh used, including when parked, to the trip meters. Bottom line, unlike Tesla, if you just leave a trip meter run forever the milage will be correct, but the KWh will include the phantom as well, so efficiency will calculate low. To get a good efficiency reading track reset meter and track individual trips. For me I average around 2.75 miles per kwh in mixed driving (Dual, large, 22" sport). Note to OP, the gen 2 in all purpose mode is always 4wd.

 

[Yossarian]

My 2024 Dual Large pack averages 2.48 over the last 10,000 miles.

My lifetime efficiency for my DM Gen 1 over 16000 miles is 2.5 mi per kwh. About 1% of that is towing or offroading.

The lifetime efficiency display for my Gen 1 2024 PDM Large pack R1T over about 11,300 miles shows 2.55 mi/kWh, roughly in line with what other G1's DM owners are seeing. I don't tow or off-road, but a lot of the mileage is around town, which I would think pulls the average down a bit. I'm running 60 series All-Season tires on 20" wheels however, which pulls things in the other direction. Regardless, an efficiency of 1.47 mi/kWh seems quite low. Hope it's just a display or calculation glitch but if not, it is surely something for a SC to look into.

 

[iowa_don]

Situation: I picked up a 2025 Gen 2 Dual Large in Feb 2025. So it's been the tail end of winter, spring and the early part of Fall here in NJ - all good weather for EV driving.



After almost exactly nine months I thought I'd check in on my efficiency -- and it was not at all what I expected given the little driver's graph seems to typically show me averaging 2.2-2.8 mi/kwh. My usage pattern has a lot of local driving in all-purpose mode, standard ride height, soft suspension and I plug in 4-6 times/week out of habit charging off-peak. Running OEM 22" sport brights which are always within 1 PSI of recommended pressures, I adjust regularly in spring and fall in particular given the temp changes.

I knew the Gen 2 dual large (default FWD) is less efficient than my Cybertruck AWD (default RWD), but this is less than half the efficiency of what I'm seeing in the Cybertruck. How is everyone else faring? I'm getting concerned for how much juice this monster will consume in the depths of a NJ winter...

You're telling us you were getting 4+ miles per kWh in a Cybertruck? Baloney. I had a Model S for 30,000 miles and averaged about 4 mi/kWh and it is WAY more efficient than a Cybertruck. The Dirty Tesla YT channel had a Cybertruck and he reported about 2 mi/kWh for a long road trip early on. In my 2025 Rivian dual max pack R1S I am averaging 2.68 (not including non-driving kWh) for about 5,000 miles including mountain driving.

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