Cybertruck - After 3 months and over 3000 miles, an efficiency metrics is wrong?

[kingq]

Had the CT AWD for just over 3 months, and got 3150 on the odometer, still love it.

My daily commute is 30mi, so the number really makes sense.

A couple of facts:
1) The 'Trips' page is showing that the EPA is at 338wH/mi, which sounded pretty good, as it's close to 3mi/kWh.
2) However, my phone app's 'Charge Stats' is showing 1536kWh total charged, which implies the actual EPA is about 500wH/mi.

So, what's wrong here? The odometer has to be right, and the charge stats should be pretty accurate. That leads to that the on-board trips calculator is incorrect, way off.

So far, I've only charged at home, having solar panels installed earlier. My longest trip was 70mi away, drove a few times, and my top speed is about 70mph. Figured the most efficient way is to drive at around 50-55mph, in the slow-and-go mode, as stop-and-go costing a lot more.

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[SSonnentag]

You shouldn't compare the EPA theoretical efficiency to actual and expect a match.
You should compare the vehicle's reported lifetime efficiency to the computed efficiency using the app's reported "Total Charged" and your odometer reading.

Some of the difference is made up of losses while parked. (sentry mode, cooling, etc.)
Some of the difference may be charging efficiency losses. The app may record power drawn while the car reports power used. There is a 5-10% loss during charging.


My 2023 Model Y Performance claims 300 Wh/mile lifetime while taking the Tesla app 's "Total Charged" value of 6,595 kWh and dividing by the number of miles on my odometer (19,858 miles) give an efficiency of 332 Wh/mile.

I don't have all the answers, but it is an interesting metric to examine.

 

[Outdoors]

For true efficiency numbers one should count power from the wall, and all the losses that come with it. Then measure the distance traveled. Yet no one does that. Those losses are real, and many other items we use have loses from the wall. So both are right, just what matters is the way one looks at it.

 

[Pops]

I run Sentry mode and Cabin Overheat Protection all the time, even at home. Total charged 1409 kWh, Total miles 1094.

1290 wh/m... ouch.

I plan to turn off Sentry and OHP once I clear out my garage and can fit it in. I am waiting for my powershare to be installed and I need to move a literal ton of bricks. Right now I am paying roughly $2.15 a day to keep both features turned on.

 

[Woodrick]

Had the CT AWD for just over 3 months, and got 3150 on the odometer, still love it.

My daily commute is 30mi, so the number really makes sense.

A couple of facts:
1) The 'Trips' page is showing that the EPA is at 338wH/mi, which sounded pretty good, as it's close to 3mi/kWh.
2) However, my phone app's 'Charge Stats' is showing 1536kWh total charged, which implies the actual EPA is about 500wH/mi.

So, what's wrong here? The odometer has to be right, and the charge stats should be pretty accurate. That leads to that the on-board trips calculator is incorrect, way off.

So far, I've only charged at home, having solar panels installed earlier. My longest trip was 70mi away, drove a few times, and my top speed is about 70mph. Figured the most efficient way is to drive at around 50-55mph, in the slow-and-go mode, as stop-and-go costing a lot more.

Have you ever sat in the Cybertruck looking or talking and the A/C was on?
Do you have Sentry Mode on?
Do you have cabin overheat on?

 

[kingq]

Have you ever sat in the Cybertruck looking or talking and the A/C was on?
Do you have Sentry Mode on?
Do you have cabin overheat on?

Haven't stayed in it with A/C on.
Only used Sentry for the first few days, as it doesn't fit my small garage, and found it drained too much so never turned it back on afterwards.
Cabin overheat was set only recently.

I now realize the difference between the 2 metrics is mainly CT's own/internal consumption, and partially the cabin overheat A/C.

 

[Woodrick]

Haven't stayed in it with A/C on.
Only used Sentry for the first few days, as it doesn't fit my small garage, and found it drained too much so never turned it back on afterwards.
Cabin overheat was set only recently.

I now realize the difference between the 2 metrics is mainly CT's own/internal consumption, and partially the cabin overheat A/C.

You haven't even left the door open while showing it off? I guess some of the novelty for the bay area has worn off.
Cabin overheat can be expensive, just like leaving the door open or sitting in it. Mine is in the garage and showing 100 degrees right now. Previous versions of overheat in the other vehicles allowed fan only, but I can't find that in the Cybertruck right now.

 

[Ri22]

Shouldn't you also deduct SOC KwH from Lifetime charging KwH? Then compute KwH/Mi.

 

[ScouterJohn]

Phantom drain can add up as well. Kinda implied from @SSonnentag 's post.

 

[CyberKnight]

I run Sentry mode and Cabin Overheat Protection all the time, even at home. Total charged 1409 kWh, Total miles 1094.

1290 wh/m... ouch.

I plan to turn off Sentry and OHP once I clear out my garage and can fit it in. I am waiting for my powershare to be installed and I need to move a literal ton of bricks. Right now I am paying roughly $2.15 a day to keep both features turned on.

Ouch is right. I was feeling wasteful for a moment, (but realized I won’t be setting any efficiency records as it has been 117 and above for a while here in Las Vegas) but I am getting 710 wh/m. I have had it only a couple of weeks but as this is my first Tesla, I am getting used to driving it. Still in love with it TBH.

 

[Woodrick]

Ouch is right. I was feeling wasteful for a moment, (but realized I won’t be setting any efficiency records as it has been 117 and above for a while here in Las Vegas) but I am getting 710 wh/m. I have had it only a couple of weeks but as this is my first Tesla, I am getting used to driving it. Still in love with it TBH.

Look at the energy graph page, I don't think that 120 degrees can account for 710 wh/mi.
The energy graph breaks out the different usages of power.

710 Wh/mi sounds more like you are really enjoying it.

 

[Haoooc]

I think your numbers are very expected. I didn’t turn on overheat protect but only sentry mode if not at home. I am in Texas and I do turn on AC earlier and sitting in the car with AC on a few times. All these power used will not be part of your wh/mi shown in CT. In my case my kWh used on driving is only ~63% of the total kWh charged.

 

[CyberKnight]

Look at the energy graph page, I don't think that 120 degrees can account for 710 wh/mi.
The energy graph breaks out the different usages of power.

710 Wh/mi sounds more like you are really enjoying it.

I have glanced at that page a few times. I will spend a little more time with it.

I stand corrected. From the Trip page it shows 475 wh/mi which still seems like it is not quite making the range others are making.

And just for clarification, I am driving in “Chill mode” and have used the brake 3 times. Most of my driving is city miles. I have yet to do a roadie. Perhaps this weekend.

Someone mentioned draining the battery down to <7%. I have to admit I am a recovering “topper” as I have spent more time topping off the battery instead of letting it deplete down to single digits.

 

[CyberKnight]

Shouldn't you also deduct SOC KwH from Lifetime charging KwH? Then compute KwH/Mi.

That sounds more correct. I was thinking that after I hit “Post”.

Thank you for pointing that out.

 

[Woodrick]

I have glanced at that page a few times. I will spend a little more time with it.

I stand corrected. From the Trip page it shows 475 wh/mi which still seems like it is not quite making the range others are making.

And just for clarification, I am driving in “Chill mode” and have used the brake 3 times. Most of my driving is city miles. I have yet to do a roadie. Perhaps this weekend.

Someone mentioned draining the battery down to <7%. I have to admit I am a recovering “topper” as I have spent more time topping off the battery instead of letting it deplete down to single digits.

It's quite easy to get bad mileage in Chill mode, just as it is easy to get good mileage in the other modes.
The biggest detractor is speed. Expect to lose about 10% for every 5 mph over 60 and gain it in the other direction (down to about a max at 30 mph).

I had a Leaf with 88 miles range. I had one trip that I did periodically that if, in the summer, I did at about 60 mph, I could round trip it easily.
But if I was in the HOV lane going 70 or above and/or cooler temperatures, I'd have to stop and charge on the way home.
Since in GA with an EV plate, I can travel for free in the HOV/HOT lanes, I avail myself of it. But there were many times that I'd hope that they traffic would get congested and slow down, so I didn't have to charge.

It just takes time.

And it really doesn't matter. How many times in your daily commute have you come anywhere near running out of charge? So is it a big deal if you get 350 Wh/mi vs 450?

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