The 2025 Rivian R1S Large pack is...uh...not so Large (or efficient)

[Polar]

So we’re not talking about the size of the pack we’re talking about the efficiency; maybe fix the title of your post.

Also zero interest in watching embedded YouTube videos.

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[bfilippo]

Yeah, this is why I have a Gen2 Dual Standard R1T and Gen1 Quad Large R1S. I almost got the large for our first one the R1T, but then I read about the pack size differential and didn’t see the point in spending the extra money.

My standard pack Gen2 efficiency is 2 in winter in Maine, and looking like 2.6+ for April-October.

 

[carsly]

For reference, I went out and back repeating about 11+ miles of my journey with my aerodynamic triangle (Cybertruck AWD) running on 35" all terrains a few hours later, same ambient temps and NO pre-conditioning and averaged 2.93 mi/kwh. See the 'Since Charge' column.

Shouldn't the R1S Dual be more efficient with EPA range of 330 mi on a 109 kwh pack vs. 318 mi of EPA range on my Cybertruck with its 123 kwh pack?

Something is fishy...

 

[UnsungZero_OldTimeAdMan]

A large 7k lb rectangular mass with lots of daylight between belly and ground. Even with the wind tunnel work done by Rivian, this is about as good as it gets—until better battery chemistry and tire technology is available in the future. Ambient temp and elevation (air density), even wind direction, all play a role as well. Better charging infrastructure is still the one thing that can make the most difference now and in the immediate future. But "progress" is incompatible with current leadership.

 

[Kaiju]

Seems like something's amiss. I can get 2.4 going 65 in a dual large. Driving 30-40 usually lands me around 3.7.

Headwinds and road surface can have some surprising impacts, but you'd have to be driving into a 30mph+ headwind to get your efficiency hit like that.

Hard to say exactly what though. There's only so many things you can test. I wouldn't think there's too many systems that have that sort of power draw. HVAC, battery heating. I suppose it's easy enough to do a test with the HVAC off.

 

[Proxy]

Did a convoy with two Gen 1’s. An R1S dual max on 21” OEM’s followed by R1T Quad large on 20” OEM set to follow setting 2 on I-5 in CA. The S left the DCFC at 75% and the T left with 77%. Drove the speed limit to plus 5. The R1T battery was 10°F warmer than the S. R1S arrived at 20% and the R1T 18%. All purpose mode for the dual motor S and conserve for the Quad motor T. The T did have the advantage with the S punching a hole through the air. We probably should have switched half way but we were a little concerned that we would be cutting it too close since the T was on OEM All Terrain tires with a smaller battery. I think the EPA ratings are based on such a low average speed that the difference in rated range is only 2-3%. In the real world at higher speeds the difference in drag for an SUV and a Pickup makes a larger impact. I have noticed on multiple road trips with each one that the S always “loses” estimated miles and the T always gains. After more than 20,000 miles on each vehicle,, I estimate the dual max on 21” wheels will get 360 miles on a road trip 100-0% and the quad large (gen 1) will get 320 miles on 20” wheels. I am certain that if I switched wheels and tires the Quad pickup would go further.

 

[Schroederhc]

Gen 1 lrg Perf 22 darks 18,632 miles 2.3 lifetime

 

[SDH]

2.38 mi/kWh

Isn't that pretty much par for the course in the R1S?

I'd take that all day long with my LE R1T

 

[clostridium]

2.38 mi/kWh

Isn't that pretty much par for the course in the R1S?

Not for the speeds and conditions he describes. I would expect it to be significantly higher ie closer to 2.8-3mi/kwhwhen going under 50 mph in temperate conditions.

 

[DRJ564]

Gen 1 quad R1S on 22” original tires 30K miles 2.54 lifetime.

 

[narmstrong79]

Rivian, when switching to the new cell, reduced the capacity of large to make MAX look like it adds value, which it didn't on gen 1. Gen 1 large is the better battery pack.

 

[Donald Stanfield]

The Cybertruck could get 5 mi/kWh, and I still wouldn't care. I wouldn't drive a dumpster around unless it printed money while driving down the road.

 

[LL75]

2.38 is pretty damn good. i wished I could get that. My life time on my Quad R1s (35K miles) is 2.3 and my Dual R1T (11K miles) is 2.26. Both are gen 1.

 

[Goose]

Not for the speeds and conditions he describes. I would expect it to be significantly higher ie closer to 2.8-3mi/kwhwhen going under 50 mph in temperate conditions.

Interesting. Most of the anecdotal information I've seen indicates 2.4(ish)mi/kWh is pretty much the all around consumption for the R1S with 22's.

 

[BCondrey]

I think OPs issue is the 330 mile range, vs the 260 mile range his test yielded. He would have to get an efficiency of at least 3 mi/kwh to get that range. Is it possible? Sure, just drive 35 mph for 9 hours. One good thing about the gen 2, is that you can regularly charge it to 100%, right? Because it is LFP battery chemistry.

The other thing is about the "30 minutes of pre-conditioning". I haven't noticed that being plugged into L2 does ANYTHING when it is not actively charging. I stay connected to L2 90% of the time in the driveway, and I still take a huge eff hit when I start out.

I am still amazed that people spend this kind of money on a vehicle and are surprised by the real-world results that are well documented in forums like this. None of this should be a surprise to someone who researches before the sale.

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