Range drop?

[Daraiders76]

It feels weird- this is my second issue come up today and in my month of owning my MME I didn’t have any. So this morning after charging last night my range was 300. I drove to work with no climate control. It’s 32 miles. My range went down to 270. I worked 4 hours and when I got in my car to leave my range said 211. WTF? Where did it all go?

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[Murse-In-Airy]

Did it get colder? Did your car go out for lunch without you? Did the battery SOC percentage change between these two times?

 

[Daraiders76]

Did it get colder? Did your car go out for lunch without you? Did the battery SOC percentage change between these two times?

Did not get colder(pretty mild weather here in CA). I’m pretty sure the percentage was about the same though don’t know for sure. It was pretty weird. There was some type of warning that popped up on the speedo display. I didn’t catch it until right before it turned off

 

[Trede]

Did the temperature change? Did you get the same mi/kwh on that drive that you've gotten on most of your other drives? The listed "range/dist-to-empty" is going to vary a lot more in an EV than an ICE vehicle because more variable affect them. ICEs are like 12-30% thermal efficiency (depends on the engine), EVs get 70-90% (part depends on motors, but also temp/SOC/driving style/etc can make it vary more widely).

 

[Murse-In-Airy]

Did not get colder(pretty mild weather here in CA). I’m pretty sure the percentage was about the same though don’t know for sure. It was pretty weird. There was some type of warning that popped up on the speedo display. I didn’t catch it until right before it turned off

I would have bet on a cold front. I can lose 60 miles of “range” on the GOM overnight prettt easy. 72° when I close up the garage and 27° when I want to go to work. Maybe it knew you were going to be in a hurry to get home and drive faster, therefore decrease your efficiency. Or maybe you had road rage going in to work and while it sat there thinking it decided to recalibrate for your driving style. It’s just a GOM. You didn’t lose any actual range. Though it would be curious what made the computer change its calculation.

 

[shutterbug]

It feels weird- this is my second issue come up today and in my month of owning my MME I didn’t have any. So this morning after charging last night my range was 300. I drove to work with no climate control. It’s 32 miles. My range went down to 270. I worked 4 hours and when I got in my car to leave my range said 211. WTF? Where did it all go?

Did the charge level change? If not, just ignore.

 

[dbsb3233]

Did the charge level change? If not, just ignore.

Yep. The GOM is just a step above permanently ignoring anyway. I wouldn't quite say it's worthless, but, well, not too far removed. It's too weighted toward recent driving history, IMO. One poor stretch (uphill, cold, high seed, etc) and it's likely to drop the whole GOM range.

Battery% is what matters. Won't take long to get used to what that typically means for the type of driving planned. The big thing is accounting for the much higher varability of negative factors. The car can't know that (unless a route is set in the nav). This example is a good one to illustrate how widely the range/mileage varies in a BEV based on various conditions.

 

[Trede]

Did not get colder(pretty mild weather here in CA). I’m pretty sure the percentage was about the same though don’t know for sure. It was pretty weird. There was some type of warning that popped up on the speedo display. I didn’t catch it until right before it turned off

The warning that popped up on my speedo display (I wasn't quick enough to get a pic of it this morning, sadly) said something along the lines of "Estimated range modified due to external temperature". Could have been that? (edit: I know you said it didn't change, but from the car's perspective sun vs shade could have caused something like that?)

 

[c max]

It feels weird- this is my second issue come up today and in my month of owning my MME I didn’t have any. So this morning after charging last night my range was 300. I drove to work with no climate control. It’s 32 miles. My range went down to 270. I worked 4 hours and when I got in my car to leave my range said 211. WTF? Where did it all go?

Funny, a similar situation came up with me yesterday......I moved my car from the driveway to the street so I could take my c max for a little ride-around, EST Range 252 miles.......came home 20 minutes later, moved the Mach e back into the driveway, still 252 miles......4 hours later had to make a brief store run, EST Range down to 165 miles.......so I drove to the store, somewhat confused.......as I was driving about 15 miles all together, the EST Range was adding not taking away miles, by the time I came home the EST Range went up to 172, even after driving 15 miles......so I decided to charge this morning.....its been charging 5 hours and the EST Range has gone from 172 to 266 EST miles......I am charging on a 120 line ONLY so I should average about 5 added miles to EST Range per hour (that's my history in 2 months ownership as per Ford Pass stats).....????.......was there an OTA????.......I'll see what today brings....Oh temps here in NJ yesterday 60's, today 70's......and the loss of miles happened during the day not night....


UPDATE......charged to 91% EST Range 274.....drove 12 miles to garden center......got back in car EST Range dropped to 175 in the 45 min we were at the garden center.....drove home 12 miles EST Range ADDED 4 miles during the trip home, DID NOT LOSE any EST miles on the way home.....have had the car for 2 months, this didn't even happen during the cold of FEB......temp today in NJ 77degrees

 

[Rob FFE]

It feels weird- this is my second issue come up today and in my month of owning my MME I didn’t have any. So this morning after charging last night my range was 300. I drove to work with no climate control. It’s 32 miles. My range went down to 270. I worked 4 hours and when I got in my car to leave my range said 211. WTF? Where did it all go?

It didn't go anywhere. The car's estimation of how far you can drive on the present state of charge changed because of how its algorithm works.

Please understand that the Range indication is NOT a measure of what is left in the battery and it doesn't even mean that you will be able to drive that number of miles on the charge that is left. It is an estimate (and mostly a very pessimistic one) of how far some algorithm determines you may be able to drive on the battery's current state of charge. Most drivers are accustomed to a fuel gage and the percentage indication of battery capacity is much more like the fuel gage. It seems that Ford has not made this clear and new EV drivers are seeing the larger Range display and treating it like a measure of battery state of charge.

 

[c max]

Funny, a similar situation came up with me yesterday......I moved my car from the driveway to the street so I could take my c max for a little ride-around, EST Range 252 miles.......came home 20 minutes later, moved the Mach e back into the driveway, still 252 miles......4 hours later had to make a brief store run, EST Range down to 165 miles.......so I drove to the store, somewhat confused.......as I was driving about 15 miles all together, the EST Range was adding not taking away miles, by the time I came home the EST Range went up to 172, even after driving 15 miles......so I decided to charge this morning.....its been charging 5 hours and the EST Range has gone from 172 to 266 EST miles......I am charging on a 120 line ONLY so I should average about 5 added miles to EST Range per hour (that's my history in 2 months ownership as per Ford Pass stats).....????.......was there an OTA????.......I'll see what today brings....Oh temps here in NJ yesterday 60's, today 70's......and the loss of miles happened during the day not night....


UPDATE......charged to 91% EST Range 274.....drove 12 miles to garden center......got back in car EST Range dropped to 175 in the 45 min we were at the garden center.....drove home 12 miles EST Range ADDED 4 miles during the trip home, DID NOT LOSE any EST miles on the way home.....have had the car for 2 months, this didn't even happen during the cold of FEB......temp today in NJ 77degrees

 

[Trede]

This is just the guessing-computer recomputing its guesses far more frequently than an ICE car, and with more room for shifts because ICE cars' baseline thermal efficiency sucks by comparison and doesn't shift as much due to external temp/driving habits/heat being on/etc...
It'd be like watching your estimated range in real time in a V8 while going down a hill (woo 500 miles of range!) and then immediately up a mountain (50 miles of range? Where did it all go?).
The battery % is what you should watch, the GOM being more "active" just takes more getting used to.

 

[c max]

This is just the guessing-computer recomputing its guesses far more frequently than an ICE car, and with more room for shifts because ICE cars' baseline thermal efficiency sucks by comparison and doesn't shift as much due to external temp/driving habits/heat being on/etc...
It'd be like watching your estimated range in real time in a V8 while going down a hill (woo 500 miles of range!) and then immediately up a mountain (50 miles of range? Where did it all go?).
The battery % is what you should watch, the GOM being more "active" just takes more getting used to.

This does NOT explain how the car can have an EST Range of 252 miles, move from my driveway to the street, then back to the driveway, and 4 hours later WITHOUT any driving, drop to 165 miles........AND if this is NORMAL why has it NOT happened before, BUT happened again today.......today charged to 274 EST Range, drove 12 FLAT, LOW SPEED (25-35) miles........parked, got back in the car and EST Range dropped to 175.......I COMPLETELY UNDERSTAND THE EST RANGE concept........this is entirely new to this car......I mean EST Range 252, 4 hours later with NO DRIVING, in the same driveway, dropped to 165?????????????????????????????

 

[timbop]

It's almost like the range estimate displayed by the car is a guess....

 

[timbop]

This does NOT explain how the car can have an EST Range of 252 miles, move from my driveway to the street, then back to the driveway, and 4 hours later WITHOUT any driving, drop to 165 miles........AND if this is NORMAL why has it NOT happened before, BUT happened again today.......today charged to 274 EST Range, drove 12 FLAT, LOW SPEED (25-35) miles........parked, got back in the car and EST Range dropped to 175.......I COMPLETELY UNDERSTAND THE EST RANGE concept........this is entirely new to this car......I mean EST Range 252, 4 hours later with NO DRIVING, in the same driveway, dropped to 165?????????????????????????????

DID THE CHARGE PERCENTAGE CHANGE AT ALL?
THE GUESS-O-METER HAS ZERO AFFECT ON YOUR MI/KWH, AND THUS NO BEARING ON HOW FAR YOU CAN ACTUALLY DRIVE.

WHY ARE WE SHOUTING????????

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