Range and thoughts? (Gen2 R1S dual motor)

[bod925]

Question for you Gen2 R1S dual motor folks. I'm getting around 2.1 mi/kwh on highway driving 77-78mph. No towing, only myself in the vehicle. Outside temps are mid-high 70's
Have all purpose mode on with standard ride height. If my calculation is correct, with a nearly full charge on my Max battery, my range is 2.1 x 140 kw = 294 miles.
I know EPA says "410" and I don't expect to reach that, but this still seems a bit low. Was hoping for around 350 miles out of a full charge (2.5 mi/kwh).
Thoughts? What are you getting?

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[emoore]

2.1 is pretty good for all purpose (I assume it goes to conserve automatically) and 80 mph in standard height. Slowing down will help a lot.

 

[portdirect]

This is around what we get in our dual R1S (though a gen1 with 21s) @70-80f with no significant wind

 

[VandalSibs]

Remember, the EPA rating is a mix of highway/freeway and street driving. Think it essentially is the same as if you were always driving at about 48 mph. Going fasterwill always decrease range, be it EV or ICE.

2.1 mi/kWh is pretty good for the speeds you are doing - I personally never drive faster than 70-75 mph for any length of time, but speed limits where you are are likely higher than where I am

 

[Eeyore]

Yep, slower is more efficient for sure. Oregon's max limit is 65, so I try to stay under 75. For hypermile driving, I stay closer to 65.

I personally never drive faster than 70-75 mph for any length of time, but speed limits where you are are likely higher than where I am

Is that because the WSP have a solid reputation for enforcing the 70 MPH limit?
When I drive up to my son's in Shoreline, I try to stay at 72.

 

[VandalSibs]

Yep, slower is more efficient for sure. Oregon's max limit is 65, so I try to stay under 75. For hypermile driving, I stay closer to 65.

Is that because the WSP have a solid reputation for enforcing the 70 MPH limit?
When I drive up to my son's in Shoreline, I try to stay at 72.

I don't personally know how how vigilant WSP is, I just don't like going too far over the limit, and I also want to balance efficiency and not being a burden to traffic.

 

[evlavista]

Sounds about right. Driving ev's has taught me to slow down, be colder in the winter and follow semis. I'm older now and don't mind not getting somewhere in a rush.

 

[babock]

Driving to lake Tahoe and back for Los Angeles, We average around 2.5mi/KWh in our Gen 2 Dual motor R1T, going 71MPH. I am sure it would drop WAY down going another 5MPH.

Drive slower.

 

[TomServo2112]

Question for you Gen2 R1S dual motor folks. I'm getting around 2.1 mi/kwh on highway driving 77-78mph. No towing, only myself in the vehicle. Outside temps are mid-high 70's
Have all purpose mode on with standard ride height. If my calculation is correct, with a nearly full charge on my Max battery, my range is 2.1 x 140 kw = 294 miles.
I know EPA says "410" and I don't expect to reach that, but this still seems a bit low. Was hoping for around 350 miles out of a full charge (2.5 mi/kwh).
Thoughts? What are you getting?

I have a Dual Motor Large+ which is a Max pack software limited, so our vehicles are pretty much the same aside from max usable capacity. Oh wait, I don't know what your tire/wheel combo is. Mine is 22" Sport. Assuming you're looking at a 410 EPA range, I'm guessing yours are too?

My lifetime over 24k miles is 2.6mi/kwh and I road trip quite a bit through Nevada, Utah & Colorado. I also usually have my ride height set to Auto, so have a fair amount of those miles at Low instead of Standard. About 59% of my total mileage is above 55mph, and 69% of that is above 65mph.

On electrafi, my numbers say that my speed efficiency at 75-80mph is 13% worse than at 60-65mph. Apparently I don't have enough miles above 80mph to register (or their scale won't show them).

Real world when temps are warm enough (and little headwinds) I can knock out 305 miles from home to the Las Vegas RAN from 100% to 2-4%. That would map out to about 315 if I went 100 to zero, at 2.6mi/kwh. My avg mph during that drive is 60-65 (L.A. traffic sucks) with peaks over 80mph. That would be 364 miles on your Max pack.

Doing a reverse leg from Utah past Vegas to the Baker EA charger, I go from 100 to 12% over 292 miles which is about 2.77mi/kwh. It's a massive descent, though, but usually also with a lot of headwinds at an avg 65mph peaking well over 80mph since the I-15 has an 80mph limit in Utah. During this leg I could get just the EPA rating of 331miles if I drove to zero. The math says you'd get 388 miles. Seems like it would be more difficult for you to get the EPA rating than for me, since you'd have to hit 2.93 mi/kwh.

So if I pushed to 75-80mph for those stretches, at approximately 13% less efficient, it would be 265 miles going towards the Vegas RAN from home, and might not make it to the Baker EA from Utah and would have to stop at Primm EA in both directions (Blechh.).

In any case, I feel like you should be getting a bit better than 2.1 even driving at those speeds. Maybe not much better, but a bit. Perhaps Low ride height would help that?

 

[HaveBlue]

Question for you Gen2 R1S dual motor folks. I'm getting around 2.1 mi/kwh on highway driving 77-78mph. No towing, only myself in the vehicle. Outside temps are mid-high 70's
Have all purpose mode on with standard ride height. If my calculation is correct, with a nearly full charge on my Max battery, my range is 2.1 x 140 kw = 294 miles.
I know EPA says "410" and I don't expect to reach that, but this still seems a bit low. Was hoping for around 350 miles out of a full charge (2.5 mi/kwh).
Thoughts? What are you getting?

The Max Pack is rated at 410 miles with efficiency tires. Sport wheels/tires are rated for 380. I get about 350 miles with those but probably wouldn't if I drove 80mph for the whole pack.

 

[carsly]

Speed is an efficiency killer. Drive 55-65mph and you'll see quite a bump. On 65-70 mph highways my Dual/Large with 22's will usually do around 2.4 mi/kwh. I can get 2.8-3.0 mi/kwh if I take backroads and travel 35-55mph.

Mind you, my dual motor AWD Cybertruck on 35" all terrains will do 3 mi/kwh all day in moderate temps traveling sub-75mph. Somehow, the less aerodynamic wedge is much more efficient around town and on highways.

I also think the Gen 2 heat pump isn't very good - loud, seems inefficient and not particularly effective in terms of time/energy to create a specific thermal output (heating or cooling).

 

[HaveBlue]

Man Tesla really has the efficiency dialed in. Rivian does pretty well but wow.

 

[bod925]

I have a Dual Motor Large+ which is a Max pack software limited, so our vehicles are pretty much the same aside from max usable capacity. Oh wait, I don't know what your tire/wheel combo is. Mine is 22" Sport. Assuming you're looking at a 410 EPA range, I'm guessing yours are too?

My lifetime over 24k miles is 2.6mi/kwh and I road trip quite a bit through Nevada, Utah & Colorado. I also usually have my ride height set to Auto, so have a fair amount of those miles at Low instead of Standard. About 59% of my total mileage is above 55mph, and 69% of that is above 65mph.

On electrafi, my numbers say that my speed efficiency at 75-80mph is 13% worse than at 60-65mph. Apparently I don't have enough miles above 80mph to register (or their scale won't show them).

Real world when temps are warm enough (and little headwinds) I can knock out 305 miles from home to the Las Vegas RAN from 100% to 2-4%. That would map out to about 315 if I went 100 to zero, at 2.6mi/kwh. My avg mph during that drive is 60-65 (L.A. traffic sucks) with peaks over 80mph. That would be 364 miles on your Max pack.

Doing a reverse leg from Utah past Vegas to the Baker EA charger, I go from 100 to 12% over 292 miles which is about 2.77mi/kwh. It's a massive descent, though, but usually also with a lot of headwinds at an avg 65mph peaking well over 80mph since the I-15 has an 80mph limit in Utah. During this leg I could get just the EPA rating of 331miles if I drove to zero. The math says you'd get 388 miles. Seems like it would be more difficult for you to get the EPA rating than for me, since you'd have to hit 2.93 mi/kwh.

So if I pushed to 75-80mph for those stretches, at approximately 13% less efficient, it would be 265 miles going towards the Vegas RAN from home, and might not make it to the Baker EA from Utah and would have to stop at Primm EA in both directions (Blechh.).

In any case, I feel like you should be getting a bit better than 2.1 even driving at those speeds. Maybe not much better, but a bit. Perhaps Low ride height would help that?

Thanks for the details! I did some rough math and discovered, at least in my situation, I'm still better off driving a little faster and stopping to charge for a short time. Here is what I came up with:

300 miles to the Pooler, Georgia RAN from home. If I drive 70mph and can hit 2.5 mi/kwh then I would make it without stopping in 4.29 hours (300/70).

At 78 miles per hour, I can make it in 300/78 = 3.85 hours.
The difference is 0.44 hours = 27 minutes faster going 78mph versus 70 mph. But that takes me down to about 2.10 mi/kwh requiring an extra stop to charge.

ABRP says I would need to stop in Orangeburg, South Carolina for a 9 minute charge at Tesla charger.
Let's round up to 15 minutes for charging, getting off highway, etc.
So 27 minutes - 15 minutes = 12 minutes faster going 78 mph vs. 70 mph even with the short stop to charge.

Hope all this makes sense. Seems to me, I'm still better off driving faster than slower in this scenario.
I use 78 mph because that is my set cruise speed when I take an ICE on trips.

 

[jambaman84]

Anything over 75mph and your range will take a big hit. I drive around 70 and constantly get 2.4-2.7kWh. It's hard to drive that slow, but I do it for the improvement in range.

 

[TomServo2112]

Thanks for the details! I did some rough math and discovered, at least in my situation, I'm still better off driving a little faster and stopping to charge for a short time. Here is what I came up with:

300 miles to the Pooler, Georgia RAN from home. If I drive 70mph and can hit 2.5 mi/kwh then I would make it without stopping in 4.29 hours (300/70).

At 78 miles per hour, I can make it in 300/78 = 3.85 hours.
The difference is 0.44 hours = 27 minutes faster going 78mph versus 70 mph. But that takes me down to about 2.10 mi/kwh requiring an extra stop to charge.

ABRP says I would need to stop in Orangeburg, South Carolina for a 9 minute charge at Tesla charger.
Let's round up to 15 minutes for charging, getting off highway, etc.
So 27 minutes - 15 minutes = 12 minutes faster going 78 mph vs. 70 mph even with the short stop to charge.

Hope all this makes sense. Seems to me, I'm still better off driving faster than slower in this scenario.
I use 78 mph because that is my set cruise speed when I take an ICE on trips.

Yeah, makes sense. I struggle with that balance too. Usually on the road trips I was describing I'm pretty open-ended so don't mind charging for a bit longer, and if I stop at the Vegas RAN there's a huge mall with restaurants and shops to hang out at, so I'm usually in no rush. For me it's about getting to the *next* charger if I can. Instead of stopping at Primm, get to Vegas. Instead of stopping in Vegas, get to Baker, etc. It may be worth testing out driving on Auto to see if that makes a significant impact for you.

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