Charging ?

ARK

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Thanks for the info, I will ignore miles and just look at Battery %. If I brick on the road with just watching battery %, I will call you for a Tow.. :)
P.S I see that percentage and that is what I thought. How can it die if I go by %
I think you have the AWD ER Mach-E - EPA range is 270 miles on this model.

You can get stranded if you assume a 50% charge necessarily means you will get half the EPA range, i.e. 135 miles. You won’t necessarily get that, it depends on temperature and how you drive and where you drive and a few other things.
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Go by the battery percentage. The miles you are seeing are from what is nicknamed the guess-o-meter (GOM). It is a conservative projection of range based on driving history. It is dynamic and often changing day to day, week to week.

Particularly if the vehicle has not been touched for two months, the GOM might be a bit off, however, know that depending on driving style, you may often fall short of the EPA range (for example, if 90% of your miles are spent at 85mph on the freeway, you will be way below EPA range).

Also, as others have said cold weather reduces your range - 50s is suboptimal for an EV.
If 50f is sub optimal, then those of us in cold winter regions that see sub zero f at night are looking at a 40% hit in range.
 
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Mr.Doug

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If 50f is sub optimal, then those of us in cold winter regions that see sub zero f at night are looking at a 40% hit in range.
Yes, that is Crazy.. We have 2 Tesla's Model Y's and they only take a hit of MAYBE 3-5% depending on the current daily temp and conditions .. Tesla calculates out the Temps every day to project what are miles remaining and battery % .. Ford engineers may want to take redrive in a Tesla in cold weather conditions and learn to give accurate daily miles remaining and battery percentage on a daily basis like Tesla.. No math required..
Tesla builds cars and SpaceX can FLY Rockets.. If Musk and SpaceX can fly Rockets, they can build that technology into their cars and that is what they do.. Ford has a lot catch up to do.. I still Love my MME..
 
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There is a pending update that may fix this.
 

ARK

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Yes, that is Crazy.. We have 2 Tesla's Model Y's and they only take a hit of MAYBE 3-5% depending on the current daily temp and conditions .. Tesla calculates out the Temps every day to project what are miles remaining and battery % .. Ford engineers may want to take redrive in a Tesla in cold weather conditions and learn to give accurate daily miles remaining and battery percentage on a daily basis like Tesla .
Tesla’s range estimates are well-known to be overly optimistic and not realistic when actually tested for real world usage.

This is because Tesla uses a legal loophole to game the way the EPA sets its range estimate for electric vehicles.

The temperature effect on range is something inherent to all lithium ion batteries. It doesn’t matter if we are talking Ford, Tesla, Nissan, Rivian, or if we are even talking about something other than cars like iPhones, iPads, Samsung Galaxies, Google Pixels, and the like. If it uses a lithium ion battery, cold weather will effect it in a similar way, it’s a limitation inherent to this type of battery technology.
 
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Mr.Doug

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Tesla’s range estimates are well-known to be overly optimistic and not realistic when actually tested for real world usage.

This is because Tesla uses a legal loophole to game the way the EPA sets its range estimate for electric vehicles.

The temperature effect on range is something inherent to all lithium ion batteries. It doesn’t matter if we are talking Ford, Tesla, Nissan, Rivian, or if we are even talking about something other than cars like iPhones, iPads, Samsung Galaxies, Google Pixels, and the like. If it uses a lithium ion battery, cold weather will effect it in a similar way, it’s a limitation inherent to this type of battery technology.
But if the temperature changes, so should the batteries ..Tesla adjusts that depending on Temps..
 

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But if the temperature changes, so should the batteries ..Tesla adjusts that depending on Temps..
Tesla’s range estimates are considered a bit too optimistic by most people who have tested the projection versus how many miles they were able to actually get in the end. On the other hand, Ford has taken an approach that is a bit too pessimistic, telling people they will be able to get less miles than they are actually able to get in the end.

If with your driving style, you generally meet the Tesla projection, you most likely would beat the Ford projection.
 

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But if the temperature changes, so should the batteries ..Tesla adjusts that depending on Temps..
According to Tesla, the range that‘s displayed is the rated range, not dynamic. Just because you like the bigger number better doesn’t mean that it’s accurate.
 

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Yes, that is Crazy.. We have 2 Tesla's Model Y's and they only take a hit of MAYBE 3-5% depending on the current daily temp and conditions .. Tesla calculates out the Temps every day to project what are miles remaining and battery % .. Ford engineers may want to take redrive in a Tesla in cold weather conditions and learn to give accurate daily miles remaining and battery percentage on a daily basis like Tesla.. No math required..
Tesla builds cars and SpaceX can FLY Rockets.. If Musk and SpaceX can fly Rockets, they can build that technology into their cars and that is what they do.. Ford has a lot catch up to do.. I still Love my MME..
AGAIN THE HIT IS ON THE GUESS-O-METER. At 50 degrees F you'll see a small ACTUAL decrease in range. At 30 you'll see a little bit bigger one, depending upon if you precondition and if use the heated seats or cabin heater more.

Your Tesla underestimates the range hit from temps, the Mach E overestimates. What matters is the actual change to mi/kwh (or kwh/ 100 miles or whatever Tesla reports) you get while actually driving.
 
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My MME shows 61% Charge Level on Battery Icon, and Estimated Distance 106 miles Est Distance BOTH on Dash and App.. Should I go by Battery 61% or 106 miles Est Distance?
This happened after coming out of Deep Sleep for 2 months.. when came out it was accurate to 270 miles @ 80%... I drove it and ran it down to 50% and this is what I get now.. so bottom line is, do I go by miles Est Distance or by remaining battery % at 61%.. I don't like range ANXIETY ! :)
Thanks in Advance
Getting back to the key question here: t
The % charge in the battery pack is MEASURED.
The distance is ESTIMATED.

I hope it is clear from that difference that you always trust the % charge and use the range estimate as a guide.
 

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Thanks for the info, I will ignore miles and just look at Battery %. If I brick on the road with just watching battery %, I will call you for a Tow.. :)
P.S I see that percentage and that is what I thought. How can it die if I go by %
Figure out how many miles you drive per percent. If you are at 59% now then note now many miles you traveled when you get down to 49%. Do it again when you hit 39%. That will give you a pretty good idea of your remaining range. Slow down if you are marginal.

When you get to 0% then the car will probably shut off. Sort of like reaching E on an ICE vehicle.
 
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Mr.Doug

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Getting back to the key question here: t
The % charge in the battery pack is MEASURED.
The distance is ESTIMATED.

I hope it is clear from that difference that you always trust the % charge and use the range estimate as a guide.
Hi, So for example: if my GOM reads 20 miles and battery level is say 45% can I run it down to 20% and not worry even if GOM says 0 miles ?

P.S. I want to thank you all for the awesome replies.. very helpful..
 
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ARK

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Hi, So for example: if my GOM reads 20 miles and battery level is say 45% can I run it down to 20% and not worry even if GOM says 0 miles ?

P.S. I want to thank you all for the awesome replies.. very helpful..
Yes, that's correct. Everyone who has posted here unanimously agrees.

Your battery percentage is an accurate read of the energy left in the battery. The GOM is just a 'smart' projection, a best guess of how far you can go based on the car's interpretation of what you can do with the remaining battery. How smart or not smart the GOM is is up for debate, just as with any other car.

This is how it works on your Tesla too. The Tesla tells you much raw energy your battery has, and then the car's computer gives you a mileage projection, the car's interpretation of how far you can go based on how much battery you have left.

Even gas cars from the last 20 or so years are like this. The fuel gauge tells you how much gas is in your gas tank, and then the car's computer gives you a projection of how many miles you can drive based on how much gas is in the tank. Your fuel level is accurate, the mileage projection may not be and, in fact, depends on how you drive.

If your gas car says your 1/8 tank is going to get you an additional 20 miles, do you agree that whether or not you will actually get those 20 miles depends on whether you are, for example, cruising down a residential road at 25 mph versus redlining the engine on the freeway at 140 mph? Exact same principle applies with electric cars.

The battery level/fuel level is the one that is very accurate. But how far you can go is always up to interpretation and some cars are better or worse at making the range projection.
 

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Yes, that's correct. Everyone who has posted here unanimously agrees.

Your battery percentage is an accurate read of the energy left in the battery. The GOM is just a 'smart' projection, a best guess of how far you can go based on the car's interpretation of what you can do with the remaining battery. How smart or not smart the GOM is is up for debate, just as with any other car.

This is how it works on your Tesla too. The Tesla tells you much raw energy your battery has, and then the car's computer gives you a mileage projection, the car's interpretation of how far you can go based on how much battery you have left.

Even gas cars from the last 20 or so years are like this. The fuel gauge tells you how much gas is in your gas tank, and then the car's computer gives you a projection of how many miles you can drive based on how much gas is in the tank. Your fuel level is accurate, the mileage projection may not be and, in fact, depends on how you drive.

If your gas car says your 1/8 tank is going to get you an additional 20 miles, do you agree that whether or not you will actually get those 20 miles depends on whether you are, for example, cruising down a residential road at 25 mph versus redlining the engine on the freeway at 140 mph? Exact same principle applies with electric cars.

The battery level/fuel level is the one that is very accurate. But how far you can go is always up to interpretation and some cars are better or worse at making the range projection.

Actually that's not how it works in a tesla. The distance shown in a tesla is just a raw mapping of epa range to battery percentage. That's why it's incredibly inaccurate.

Hi, So for example: if my GOM reads 20 miles and battery level is say 45% can I run it down to 20% and not worry even if GOM says 0 miles ?
yes, but actually no. Because the system will adjust it's estimate if you still have 20% left. The estimate will be adjusted to be more accurate.
 
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Mr.Doug

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Hi, Me again.. OK, I charged my car again to 100% and GOM went up to 249, a gain of approx 60 miles from previous results, so all is well.. I have learned a lot.
On another subject, My OLDER brother has a MME as well, and cannot renew his Drivers License because of his age and health conditions.. He said for me to drive it for a year or so and sell it.. How can I delete his MME from FPass and add his to mine FPass? I'm assuming to just remove vehicle from his FPass and start over with my credentials. Your advice is Awesome..
Thanks,
Doug
 
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