Battery Range and FSD question

[Beetlebug62]

So doing the math as you showed, if I did it right I got 1230.8,
I took 382.8 x 209 % 65, the truck is currently charged at 65%. Did I do that right? And is that a good number?

123kWh is what the BMS is seeing as your pack size. Totally normal. Obviously, the service center used a lot of energy while your CT was in the shop.

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[Beetlebug62]

Ok so here's the data, I set it to show the last 100 miles since the last trip it had saved was only from the SC to home and not both ways. Can someone translate into English for me? I'm not great with interpreting it. It says my projected range is 209 miles.

Annotated with the things that stood out to me. You drove your Beast 24.1Wh/mi better than the EPA rating of 407Wh/mi.

You have 209mi of range left for your 65% of SOC, IF, you drive the same way.

And that dashed green line is your average. The solid white line is the EPA-rating. You're doing better.

 

[ABILISK]

Ok so everything is within range and seems normal to you?? The amount of drain for that SC drive seemed excessive to me and made me worry about it, but I really don't pay attention to the energy and drain all that much because like I said I don't really know how to interpret the data. I'm still fairly new to the EV world compared to others, I just know the battery is low, I charge it. Thank you for your help with it.

No idea - where do I find the lifetime Wh/mi info?

Should be in “Trips”

Mine has gone down to 450 Wh/mi since my first post. I’m now up to a 273 mi range! But, again, I drive like a bat outta hell and won’t change. Let me know yours as well as your wheel selection (I kinda assume with your username that you have a Beast)

 

[mongo]

Should be in “Trips”

Mine has gone down to 450 Wh/mi since my first post. I’m now up to a 273 mi range! But, again, I drive like a bat outta hell and won’t change. Let me know yours as well as your wheel selection (I kinda assume with your username that you have a Beast)

Only if you never, ever, never, never reset one of the trip meters (or have your computer replaced).

 

[CyberGus]

math doesn’t often lie

 

[That Beast Mode]

Annotated with the things that stood out to me. You drove your Beast 24.1Wh/mi better than the EPA rating of 407Wh/mi.

You have 209mi of range left for your 65% of SOC, IF, you drive the same way.

And that dashed green line is your average. The solid white line is the EPA-rating. You're doing better.

Awesome, thank you for the explanation, I'm actually learning from this thread. What are the super high yellow and green peaks about? Some are over 1k. The way I see it you'd think I did 3 beast mode launches - but I know I didnt, and im assuming green is re-gen.

 

[That Beast Mode]

Should be in “Trips”

Mine has gone down to 450 Wh/mi since my first post. I’m now up to a 273 mi range! But, again, I drive like a bat outta hell and won’t change. Let me know yours as well as your wheel selection (I kinda assume with your username that you have a Beast)

Thanks, I'll check it when Im home. Lol was it that obvious? Yes it's a beast and I have the all terrain tires but I don't use the cyber wheel covers (everyone said it was destroying their rims) I just have center caps that cover the bolt holes. I know the cyber covers are supposed to help with range too, although I don't know how much.

 

[mongo]

Awesome, thank you for the explanation, I'm actually learning from this thread. What are the super high yellow and green peaks about? Some are over 1k. The way I see it you'd think I did 3 beast mode launches - but I know I didnt, and im assuming green is re-gen.

That is where you are above or below the average power. Not to be confused with regen (five events below 0) vs acceleration.
Beast acceleration is up to around 750kW. 1000 Wh/mile at 60 MPH is an average output of only 60kW (roughly 80 gross horsepower).

 

[Beetlebug62]

Awesome, thank you for the explanation, I'm actually learning from this thread. What are the super high yellow and green peaks about? Some are over 1k. The way I see it you'd think I did 3 beast mode launches - but I know I didnt, and im assuming green is re-gen.

I don't think much about the peaks or troughs because they depend upon the time increment. So, bigger increments the flatter the peaks and shallower the troughs. The smaller the time increment, the peakier the peaks and the deeper the troughs. Doesn't mean much more than that's when you were going uphill or downhill.

 

[Jager]

Orange peaks in the energy graph are also strongly correlated with when the secondary motor(s) light up.

Whenever those secondary motor(s) join the party energy consumption jumps substantially (especially on the Beast). And they trigger with surprisingly little effort.

If you monitor the Energy App while driving you'll quickly come to see where your energy is going. Yes, the app is always reporting past tense, but the right-hand side of the graph is what just happened.

 

[mongo]

Orange peaks in the energy graph are also strongly correlated with when the secondary motor(s) light up.

Whenever those secondary motor(s) join the party energy consumption jumps substantially (especially on the Beast). And they trigger with surprisingly little effort.

Effect vs cause: acceleration requires more power, more power results in the other motor kicking in.
Secondary motors are also less efficient, so energy usage increases faster than mechanical power.

With a >7000 pound vehicle, a 5 MPH speed boost from 60 requires 200kJ or 56Wh. Doing that in 10 seconds requires 20kW additional power. 400Wh/mile at 60 is a baseline load of 24kW, so speeding up doubles power.
In a Beast, 60 to 65 in 2 seconds is 100kW extra.

 

[ikwill]

So for those of you out there that know the math on these things better than I do. Do you think there is an issue with my battery? I took the truck to my local SC today, it is 19mi each way. I left with 64% battery and returned with 47%. I drove there on chill mode, normal highway speeds 60-65, im not a lead foot. The truck was in service for about an hour just to factor that into the equation. To lose 17% charge over 38mi seems excessive to me. Based on my rough calculations it gives me a range of about 220mi. Shouldn't I be getting closer to 300mi with normal driving?

My next question, is there a "right" way to turn FSD off? I usually push the same button i use to turn it on. It gives me the pop up of FSD was deactivated, what happened? Nothing happened, I just wanted to take over. Just wondering if theres a proper way to deactivate it where it doesn't think something is wrong.

Thanks.

Check your energy app from the screen to get an idea where it was spent, also while on FSD, hit the brake and it may ask you if there was a problem to report, no need to answer but FSD will shut down unless you turn it off from the screen. You have to restart FSD and agree to the terms prior to engage it.

 

[Loudness]

I've been using FSD a lot more lately and I'm finding that it's incredibly efficient. I let it handle the entire ride home from the Atlanta airport yesterday evening, a 45 mile trip over highways and surface roads. About a mile from home I snapped this shot, under 300Wh/mile!

Shout out to Peachy Parking, they have indoor parking at the ATL airport with EV charging, no need to engage low power mode on a 4 day trip.

 

[Willinak]

Regarding FSD efficiency, when the CT starts from a complete stop, it lurches most of the time. I always wonder why it doesn’t progressively increase speed. A big battery waster.

 

[mongo]

Regarding FSD efficiency, when the CT starts from a complete stop, it lurches most of the time. I always wonder why it doesn’t progressively increase speed. A big battery waster.

The difference in efficiency between levels of acceleration does not have a huge impact.
Especially at low speeds.

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