Substantial Performance Drop Under 70 Percent SoC?

[Ranger Rick]

I took a shot at Google and searching previous threads, so maybe I'm not search for the right thing. Sorry if this is a redundant question.

I've noticed that in some earlier reviews of the MY21 Mach-E that users experience a significant decline in overall performance or responsiveness of the Mach-E when under a 70 percent SoC. I believe this is a separate issue from the GTPE throttling power after 5 seconds to protect the battery. I don't recall seeing any more recent videos talking about this issue, so this may have been addressed via OTA update or limited to a small number of vehicles.

Does this sound familiar to anyone? Was/is this a thing? If it is still a thing, how bad is the performance loss?

I appreciate the info.

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[Neil4Real]

When I had my Premium, I never felt a loss of power as my SoC went down. Although I never ran it below 25%/30%, I believe at some point it will start to reduce power to save battery, but probably around 10% to 20%. On my GTPE, lower SoC definitely reduces max power, as you get more grey bars so your power, uh, runs out quicker, I guess? Or caps faster?

 

[Ranger Rick]

When I had my Premium, I never felt a loss of power as my SoC went down. Although I never ran it below 25%/30%, I believe at some point it will start to reduce power to save battery, but probably around 10% to 20%. On my GTPE, lower SoC definitely reduces max power, as you get more grey bars so your power, uh, runs out quicker, I guess? Or caps faster?

Thanks for the reply.

Yeah, I figured there would be a "turtle mode" of sorts when the battery gets to an extremely low SoC, but nothing crazy that should kick in at 70 percent SoC.

Unfortunately these reviewers talk about it like it was a common knowledge issue and it was always in passing. Example, commenting about how a Model 3, "only beat me off the line because my State of charge is under 70 percent and this baby gets sluggish under 70."

I've that performance can vary with BEVs in general if there isn't enough juice to meet peak demand. Like you could have 40 percent SoC and it just cannot provide the same level of peak current as it would at 90 percent or something along those lines. However, it doesn't sound like the MME is any more notorious or hampered by this than anyone else.

 

[SnBGC]

My First Edition (Premium) does not appear to lose any power at lower states of charge.

 

[Pushrods&Capacitors]

I took a shot at Google and searching previous threads, so maybe I'm not search for the right thing. Sorry if this is a redundant question.

I've noticed that in some earlier reviews of the MY21 Mach-E that users experience a significant decline in overall performance or responsiveness of the Mach-E when under a 70 percent SoC. I believe this is a separate issue from the GTPE throttling power after 5 seconds to protect the battery. I don't recall seeing any more recent videos talking about this issue, so this may have been addressed via OTA update or limited to a small number of vehicles.

Does this sound familiar to anyone? Was/is this a thing? If it is still a thing, how bad is the performance loss?

I appreciate the info.

Fake news! Seriously, I’ve done multiple Dragy runs in our 4X in temps from the 30s to the 80s with SOC from 35% to 90% and only the cold affects the 0-60mph times, SOCs don’t seem to make much difference even down into the 30% range. Fastest time is a 4.64 w/1-ft roll out, slowest was a 5.0.

 

[macchiaz-o]

The only time I've noticed reduced power is when the car locks me out of drive modes. That's only happened on really hot days. (None in 2022 so far.)

It's pretty clear when that happens because you can't switch drive modes, the dash reverts to what looks the same as Engaged mode, and it seems like the AC isn't as powerful, either.

 

[SnBGC]

The only time I've noticed reduced power is when the car locks me out of drive modes. That's only happened on really hot days. (None in 2022 so far.)

It's pretty clear when that happens because you can't switch drive modes, the dash reverts to what looks the same as Engaged mode, and it seems like the AC isn't as powerful, either.

The heat is almost upon us again. I was surveying an apartment complex today for EV charging stations and there was a Tesla Model S cooling itself in the resident parking lot. It would run the A/C for a few minutes then turn off and then come on back again a few minutes later.

 

[Astraea]

I have noticed reduced performance in colder temps (32F and belowish) when the SoC is close to or under 20% but I wouldn't say it's substantial, just not nearly as snappy when it's 70F out and around the same SoC. But you would expect the car to not be as quick when it's freezing outside and running low on juice.

 

[phidauex]

There is no "substantial drop" below 70% SOC. The maximum power is probably slightly reduced, but "responsiveness" has nothing to do with maximum power. If you were going to be drag racing you might want to be at very high SOC, but in any other case the car feels just as spry at all but the lowest SOCs.

 

[krafty81]

No issues for me at all.

 

[Polar]

13k miles on my SR RWD and always run between 30 and 80 SOC.
seat of pants dyno - no loss of power

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