Where's my range Ford?

[Mathington]

So I purchased a 2022 Mustang Mustang Mach-E RWD STD battery. It's supposed to have 70 kWh usable and 247 MI of range. Well at 100% the GOM only displays 191 miles which is actually extremely accurate because I did a full to empty range test and I got 192 miles. Before somebody says it's cold it was 95 today and the last 2 weeks has been 70s and 80s. I have OBD scan tools for the rest of this information, it seems Ford hides 5% at the top and 5% at the bottom which it's not abnormal. Other car companies also have buffers at the top or the bottom. The bone I want to pick is the 70 kWh usable figure. When the car shows 0% and 0 miles the OBD says there's 3.3 kWh still in the battery. So that's basically unusable bottom buffer. That's fine not that strange but when I charge the car up to 100% it shows 69.28. so that would mean subtract 3.3 from 69.2 that = 65.9 usable? Am I missing something here or do I have a legitimate concern? Maybe one of my modules is damaged? The OBD reader does say my battery state of health is 100% I would just like some other opinions on this maybe someone from Ford.

I'm really curious as to why your range is so low, but perhaps it's the heat. 95F is quite warm so I wouldn't be surprised if the low efficiency is due to the car having to cool the battery.

I have an 2021 AWD Standard Range (68kWh) and found that my range in the summer (85F/30C) is quite good and my GOM usually shows 375-385km range. I don't believe I drive that efficiently but I do try to drive smoothly.

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[Crazypostman]

I'm really curious as to why your range is so low, but perhaps it's the heat. 95F is quite warm so I wouldn't be surprised if the low efficiency is due to the car having to cool the battery.

I have an 2021 AWD Standard Range (68kWh) and found that my range in the summer (85F/30C) is quite good and my GOM usually shows 375-385km range. I don't believe I drive that efficiently but I do try to drive smoothly.

The wind around here is usually quite Gusty. That must be most of the culprit

 

[SnBGC]

Nice logging! I don't drive enough miles to charge to 100 that often. But every time I do from now on I'll be sure to note the temperature! I did glance at the temperature numbers yesterday but I honestly don't remember I didn't screenshot it.

When I first starting keep track of the estimated kWh to empty and actual vs displayed S.O.C.....I was making note of the ambient temp. At some point I realized that reading can vary wildly from actual ambient since so it's not very reliable. I then defaulted to the HVB temp reading from the scan tool since I think it's likely to be more representative and probably the value the car uses to calculate that kWh to empty anyway.

 

[hawkeye3point1]

Here are some readings taken at 100% displayed on different days over the past several weeks.
HVB temp and Estimated kWh to empty

• 17C 84.144
• 21C 85.570
• 22C 86.052
• 24C 86.298
• 24C 86.506
• 25C 86.448
• 25C 86.972
• 28C 87.556

This is useful info, to provide some data reduction, over this 20 deg. F range, a range increase of 12-13 mi. would be realized, if a very efficient 3.7 mi/kWh GOM factor is assumed.

I think it validates the assumption that EV range peaks at 80 deg. F batt. temp., the only time I see this in my climate is after a Level 3 charge session.

I often see 20 mis. of range disappear overnight with a 25 deg. temp change.

 

[Red Baron]

I understand, less worried about a few kilowatt hours I'm more worried about not getting closer to the 247 mile number I'm pretty far off in the 180s and 190s. 247 would be around 3.3 miles per kwh and I seem to only be able to get 2.7 on average. I think I drive average I don't think I push it hard. Next few days I'll go out of my way to drive like a grandma and see if I can get closer.

I have a RWD STd battery Premium and have been doing combined city/highway driving for the first 500 miles. So, far, I am averaging 3.9miles/kwh in Las Vegas - temperature mostly 60's and 70's.

 

[Crazypostman]

I have a RWD STd battery Premium and have been doing combined city/highway driving for the first 500 miles. So, far, I am averaging 3.9miles/kwh in Las Vegas - temperature mostly 60's and 70's.

3.9?!?!? How can I be that far off! we've had the same temperatures I've probably had a bit more wind the wind must be more of a factor than I realize... but I honestly haven't been driving extra hard or anything.

 

[TRP]

3.9?!?!? How can I be that far off! we've had the same temperatures I've probably had a bit more wind the wind must be more of a factor than I realize... but I honestly haven't been driving extra hard or anything.

I grew up in Oklahoma. It's windy as hell there. Yes, wind plays a big roll in an EV

 

[ripperAZ]

The battery capacity reported by the OBD isn't 100% accurate, because estimating battery SoC is very, very hard. Pack voltage is only a rough proxy, since other factor such as internal resistance/pack age, current draw, temperature, etc need to be taken into account. The only way to accurate figure out how much energy is left in a pack is by counting coulombs, and the BMS doesn't do that. No one is cheating you of anything; not everyone in life is out to get you.

Just sick and tired of people pretending to be smart and catching Ford in a "GOTCHA" moment.

Do you know ….it’s not paranoia if they are really out to get you……
Jes Sayin

 

[SnBGC]

I'm really curious as to why your range is so low, but perhaps it's the heat. 95F is quite warm so I wouldn't be surprised if the low efficiency is due to the car having to cool the battery.

I have an 2021 AWD Standard Range (68kWh) and found that my range in the summer (85F/30C) is quite good and my GOM usually shows 375-385km range. I don't believe I drive that efficiently but I do try to drive smoothly.

95F isn't a problem at all for the HVB. This car can easily manage the thermal gain with mild ambient temps in that range. Even at 95F ambient...the pack itself is quite a bit lower due to it's mass.

It really becomes a problem for those areas that have temps around 100F throughout the day. Eventually the area heat soaks and even when the sun is on the other side of the planet we still are quite warm because the structures radiate that heat back to the environment. I was driving my convertible a few days ago and the ambient temp was mid 90s and it was nice and comfortable on the freeway but I definitely could feel the heat radiating from the concrete as I pass under the road bridges that route surface streets over the freeway. For those moments, it's like I opened the oven door to check my dinner. Crazy hot here during the summer.

 

[Murse-In-Airy]

Maybe a fake supercharger will help with the asthma
https://www.carthrottle.com/post/ndgkkyk/

Asthma is more about air trapped inside and not being able to get the old air out, so no new air can get in. Forcing more air in is going to exacerbate (wont say what autocorrect tried to change exacerbate to) the situation. Might need a larger exhaust manifold to help with the exhaling.

 

[RickMachE]

I have a RWD STd battery Premium and have been doing combined city/highway driving for the first 500 miles. So, far, I am averaging 3.9miles/kwh in Las Vegas - temperature mostly 60's and 70's.

This is a great example of why comparing miles per kWh is an exercise in self-flagellation.

Do you drive in the city going 20 miles per hour? Do you never go on the highway? When you go on the highway do you drive 50mph?

My lifetime is 2.6 per Trip 2, which includes over 6,000 highway miles. The best efficiency I've ever gotten on the highway between two chargers is 3.1. Most of the time it's been around 2.8, sometimes 2.9, and in winter closer to 2.3 - 2.5.

I have an F-150 with a V-8. I believe my lifetime over 50,000 miles is under 18. People talk about how they get 20+. They must drive 50 miles per hour on flat roads, never tow, never load the bed.

Comparing this stat is basically a waste of time IMO.

 

[Maquis]

This is a great example of why comparing miles per kWh is an exercise in self-flagellation.

Do you drive in the city going 20 miles per hour? Do you never go on the highway? When you go on the highway do you drive 50mph?

My lifetime is 2.6 per Trip 2, which includes over 6,000 highway miles. The best efficiency I've ever gotten on the highway between two chargers is 3.1. Most of the time it's been around 2.8, sometimes 2.9, and in winter closer to 2.3 - 2.5.

I have an F-150 with a V-8. I believe my lifetime over 50,000 miles is under 18. People talk about how they get 20+. They must drive 50 miles per hour on flat roads, never tow, never load the bed.

Comparing this stat is basically a waste of time IMO.

It’s the age-old “mine‘s bigger than yours” game! ??
Anecdote: I once had to follow a guy towing a backhoe on a trailer at 45 MPH for about 50 miles. My F150 5.0 got 25.1 MPG for that trip. ?

 

[bruceski88]

Car and Driver does a test where they run at steady-state 75MPH. Results are here, though they don't appear to test a SR model.
https://www.caranddriver.com/shopping-advice/a32603216/ev-range-explained/

Pretty impressive result for an AWD 4X, 250mi at 75 mph

 

[Crazypostman]

Pretty impressive result for an AWD 4X, 250mi at 75 mph

Did they test it until it stopped moving or did they stop at zero?

 

[SnBGC]

Pretty impressive result for an AWD 4X, 250mi at 75 mph

That sounds about right. I sometimes drive to our factory in Tucson and it is 222 miles round trip. The GOM says about 28 miles remaining. I drive 75 mph most of the way. I would guess about 200 miles @ 75 mph and the remainder is 70 mph (because I am in a hurry usually).

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