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

[carsly]

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...

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[Dave Cundiff]

No towing? This seems like unusually low efficiency, @carsly.

Worst-case phantom drain for 9 months might be maybe 700 kWh, which would lower efficiency by 700 kWh/3000 miles = maybe 0.23 kWh/mile.

I have no explanation for the rest of the discrepancy. Hopefully others in this community can help.

Best wishes!

 

[carsly]

No towing? This seems like unusually low efficiency, @carsly.

Worst-case phantom drain for 9 months might be maybe 700 kWh, which would lower efficiency by 700 kWh/3000 miles = maybe 0.23 kWh/mile.

I have no explanation for the rest of the discrepancy. Hopefully others in this community can help.

Best wishes!

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.

 

[Monty J]

One of the software updates messed up the calculation for efficiency. When the next update came out, that bug was fixed, but the old data and calculation remained. You should reset Trip A and B and follow that for a while as your effiicency should be more accurate at this point.

 

[carsly]

One of the software updates messed up the calculation for efficiency. When the next update came out, that bug was fixed, but the old data and calculation remained. You should reset Trip A and B and follow that for a while as your effiicency should be more accurate at this point.

Will give it a shot, thanks for the tip.

 

[CrazyOne]

3000 miles in 9 months. Short trips are bad for average efficiency.

 

[carsly]

3000 miles in 9 months. Short trips are bad for average efficiency.

I've done 8,000 miles in 18 months in the Cybertruck, it's not putting up numbers like this. Nowhere close.

 

[CrazyOne]

I've done 8,000 miles in 18 months in the Cybertruck, it's not putting up numbers like this. Nowhere close.

I don't know about Tesla. For Rivian, this is expected for G1 and don't expect it to be significantly different for G2.

Long trip efficiency is different. It's not too bad.

 

[Scottm]

My efficiency is over 2 mi/kwh for 35,000 in my gen1 quad R1T, so yours doesn’t make sense at all. When you open the app and you’re not around the car sites it ever show that it’s sleeping in the upper right corner? Not sure if the connectivity thing is related but I’ve never had that connectivity issue with home WiFi.

 

[Lrak1973]

Increase your tire pressure to the specified psi. That should help considerably. Running it at 45 will eat into your efficiency, in my experience. With the G1 Quad and the Goodyear Wrangler A/T 20s, I got about 2.35 for the same period of time that you looked through.

 

[VSG]

Your efficiency of 1.47 mi/kwh is very low. My Gen 1 Quad has a lifetime efficiency of 2.25 mi/kwh, and that's with 20" and a RTT and some towing (maybe 1-2% of the time). The Gen 2 Dual had better efficiency. Conclusion, 1.47 mi/kwh is "surprisingly bad", but that is not reflective of Rivian, that's something having to do with your vehicle (e.g. alignment), driving habits (e.g. use of regen, acceleration rates, hills in your area, etc.), and probably most importantly the short trips you take. Every driving session has a fixed overhead, and if you only go a few miles each session the overhead dominates your efficiency numbers.

Short trips are bad for average efficiency.

This.

Also, I don't know what Cybertruck has to do with this issue. The first thing you should be comparing your numbers to are other Gen 2 Dual/Large, rather than assuming that your particular vehicle is representative of all Rivians.

 

[riverie]

As mentioned by @MontyJ, don't believe that trip display. Mine was all over the place. I reset it after one of the summer updates and it has been accurate since.
Easy enough to look at your charging history vs your miles traveled and calculate your own number.

 

[carsly]

My efficiency is over 2 mi/kwh for 35,000 in my gen1 quad R1T, so yours doesn’t make sense at all. When you open the app and you’re not around the car sites it ever show that it’s sleeping in the upper right corner? Not sure if the connectivity thing is related but I’ve never had that connectivity issue with home WiFi.

This is what I'm seeing. Mind you, I drove the car yesterday for 40+ minutes and Spotify was working (meaning data connection was up) so not sure why the last sync was two days ago. Ideas?

 

[carsly]

Your efficiency of 1.47 mi/kwh is very low. My Gen 1 Quad has a lifetime efficiency of 2.25 mi/kwh, and that's with 20" and a RTT and some towing (maybe 1-2% of the time). The Gen 2 Dual had better efficiency. Conclusion, 1.47 mi/kwh is "surprisingly bad", but that is not reflective of Rivian, that's something having to do with your vehicle (e.g. alignment), driving habits (e.g. use of regen, acceleration rates, hills in your area, etc.), and probably most importantly the short trips you take. Every driving session has a fixed overhead, and if you only go a few miles each session the overhead dominates your efficiency numbers.

This.

Also, I don't know what Cybertruck has to do with this issue. The first thing you should be comparing your numbers to are other Gen 2 Dual/Large, rather than assuming that your particular vehicle is representative of all Rivians.

Cybertruck is similar size, weight, use cases, drivers, terrain, and identical environmental conditions - I don't own another Gen 2 Dual Large Rivian so it's as close as I have to a point of reference with all else being roughly equal. Trends should be similar, I get the exact numbers will differ due to different vehicles with different motors, batteries, aero, tires (Cybertruck is on all-terrains). That's why i posted here to hopefully get some additional data and insight since this feels aberrant.

 

[Scottm]

This is what I'm seeing. Mind you, I drove the car yesterday for 40+ minutes and Spotify was working (meaning data connection was up) so not sure why the last sync was two days ago. Ideas?

I’m not sure. Have you tried setting up a separate 2.4ghz and 5 ghz WiFi and see if you can get connected on one of them? Is it a satellite or mesh system? Assuming you’ve tried a hard vehicle reset you might try resetting routers to default settings see if it can connect. If it still won’t it seems like you need need a service visit.

also trying a service like electrafy would give you better visualization of power usage during the day vs each drive and how often it is sleeping.

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