Energy efficiency

[NYUpstate]

I got my 2022 Mustang Mach-E GT in January. With the frigid Upstate winters I was getting around 2.7 - 3.4 mi/kWh. But now I'm getting this, and I want to know: is this normal? Is this a fluke? Many of my trip logs show 5+ mi/kWh. Am I being a naive newbie? Are we talking a software/reporting problem, or am I really getting this kind of efficiency (I hope)? Would love to hear from experienced owners. Thanks.

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[MachEMaster]

I find that I get those very efficient mi/kWh on the shorter trips. Efficiency comes down on the longer legs, with spirited highway driving. The summer like weather definitely helps us out! Enjoy!

 

[hybrid2bev]

Is this normal?

Yes. FordPass is notorious for providing bad data. Don’t trust it.

 

[mkhuffman]

Actually that is a bug in the software. The trip computer in the car fails to reset after a trip, so the FP efficiency includes miles from one or more previous trips but the energy used is for the last trip. It has been this way since the MME first came out, and I cannot believe it has not been fixed yet.

Do what I do: ignore the EV efficiency reports in FP. They are wrong most of the time.

 

[SWO]

It's a bug and as a data guy it aggravates the hell out of me.

 

[woody]

If I were actually getting the efficiency FP says, I would rarely have to plug in my MME!

 

[NYUpstate]

Well, thanks. I was all excited but then thought, if this were true, Ford would surely be touting it everywhere.

 

[satchel prefect]

Regen braking is overrated.

 

[HGxxx]

I got my 2022 Mustang Mach-E GT in January. With the frigid Upstate winters I was getting around 2.7 - 3.4 mi/kWh. But now I'm getting this, and I want to know: is this normal? Is this a fluke? Many of my trip logs show 5+ mi/kWh. Am I being a naive newbie? Are we talking a software/reporting problem, or am I really getting this kind of efficiency (I hope)? Would love to hear from experienced owners. Thanks.

This is a fordpass bug. What does your car say? I would guess it's half of what fordpass says

 

[RedStallion]

I took the mileage the car reported for the last two years and divided by the amount of energy my home charger reported plus what I used during the trips. The number came out at 2.62mi/kWh. This is wall-to-wheels efficiency, it includes charging-discharging losses.
Looking at the GOM ( I reset the Trip1 4000 miles ago), it shows 3.1mi/kWh -- a 15% difference.

 

[mkhuffman]

I took the mileage the car reported for the last two years and divided by the amount of energy my home charger reported plus what I used during the trips. The number came out at 2.62mi/kWh. This is wall-to-wheels efficiency, it includes charging-discharging losses.
Looking at the GOM ( I reset the Trip1 4000 miles ago), it shows 3.1mi/kWh -- a 15% difference.

A EVSE has a typical loss of 10%. So only being 5% off isn't too bad, IMO.

 

[Maquis]

A EVSE has a typical loss of 10%. So only being 5% off isn't too bad, IMO.

EVSEs have very low losses. The losses are in the onboard charger and overhead associated with the systems in the car that are active during charging.

 

[Garbone]

Pffftt.... that is nothing.

 

[Jiji]

I am also in upstate NY and here are some real efficiency values for the past week on my wife's MME GT, I would expect your results to be similar:

Your efficiencies should be around 3.3-3.5 mi/kWh in summer and perhaps 2.4-2.7 mi/kWh in the winter, less if colder or if driving on wet roads or in slush. Here are my efficiencies over the past year (the darker bars have more miles than the lighter bars):

Try the trip odometer in the vehicle for better results but even it is flawed as it often combines multiple trips into one. But at least it gets the efficiency right.

 

[mkhuffman]

EVSEs have very low losses. The losses are in the onboard charger and overhead associated with the systems in the car that are active during charging.

I agree. Thanks for helping clarify. And typically it is around 10%.

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