Recommended high and low level when charging

[GareBare]

For our 2024 MME that we purchased in January 2025, I am wondering if there is a sweet spot for charging. I was thinking 20-80, but thought I'd see what range others may use who have had MME longer.

G-

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[Sikkun]

Go read the manual.
Charge to 100 every night.
Never charge to 100.
Sometimes charge to 100.
Set it to 90, and always plug it in.
Set it to 90 but only plug it in when it gets to 20.
Keep it as close to 50 at all times.


I think that covers 99% of the responses you’ll see .

Personally I have mine set to 90 like the manual says and plug it in every couple days. 100 before going on a trip.

DC fast charging 20-80 is pretty much the optimal range.

 

[4wheeldog]

For our 2024 MME that we purchased in January 2025, I am wondering if there is a sweet spot for charging. I was thinking 20-80, but thought I'd see what range others may use who have had MME longer.

G-

Standard or extended range? The standard battery can be charged to 100% without limitations, other than the time it takes. The extended range battery is a different chemistry and will lose capacity a bit quicker if you charge to 100% too often or worse, store it with the battery at capacity.

 

[GareBare]

Interesting. We have the extended range AWD version. Thanks!

 

[Maquis]

Plug in every night and charge to 90% unless you need full range the next day.

 

[Zardoz]

I would also recommend to plug in every night for a couple reasons:

• There have been evidence that many small charges are better than fewer large charges.
• Having the charger power available allows the car to warm/cool the battery without using battery capacity, further limiting the amount of charging (wear and tear) you're putting into the battery, however minimal.

I charge to 90% at work, 85% max at home. Typically I charge to 60% at home. I do this because I don't regularly need the range and it's cheaper to charge at work. Charging to a lower SOC may be slightly better for battery longevity too. No matter the battery % I plug it in when i get home. All this goes out the window if I need the range; 100% with no question.

(I partially had to post because Sikkun didn't cover these charge preferences, and all options need to be covered)

 

[RickMachE]

Manual tells you exactly.

 

[Space_Pony]

Plug in every night before you go to work and set departure times for a warm cabin and battery when leaving for work. I set mine to charge to 90% as recommended in the manual for an extended range.

 

[Doobster6]

For our 2024 MME that we purchased in January 2025, I am wondering if there is a sweet spot for charging. I was thinking 20-80, but thought I'd see what range others may use who have had MME longer.

G-

I limit my upper level to 90% and always have the car plugged in,, so that the car can be pre-conditioned and the cabin warmed/cooled when I want it. As I understand it, the conventional thinking has been that these battery packs can survive a certain number of ‘full’ charge cycles, that is, from say 5% to 100%, which if done that way, could get you over 200k miles according to the latest data (around 700 of these charge cycles). My strategy means my car gets recharged from whatever-to-90% every day. So charging from say 80% to 90% is only adding 10%, and so is not a ‘full’ charge cycles, and theoretically the car could tolerate 10 times as many of those compared to full charges.
ALL THAT SAID, charging strategies are an evolving topic. Changes are occurring as new data from long-term owners is added to the data pool. This newer data has some surprising new data points that upend earlier thinking, such as: certain cars that have been charged exclusively at Tesla DC fast chargers, and whose capacity degredation curve is no worse than cars that were only charged at home on A/C. It turns out that conclusions drawn from laboratory controlled studies does not represent real-world experience, which includes batteries getting constantly recharged via regen braking, a feature that has not been a part of the lab studies. The bottom line is that earlier advice now seems unnecessarily conservative, and that these batteries will tolerate almost any kind of charging strategy.
The most conservative strategy, prompted by those lab tests, says you should keep your high and low states of charge around 50%. If you use 20% of your battery on average every day, then charge at 40% and only go to 60%, etc. I did that when I first got my 2024 seven months ago, but In the face of new data challenging that have changed my approach as described; I always want to have close to maximum range available every day, JIC, and I also want to be able to pre-condition my cabin on a whim, while using house electricity.
Finally; full disclosure…….I leased my car and only anyway drive around 7k miles a year. I’ll likely upgrade to whatever is the new 2027 model when the lease is up and so am not worried about whatever battery capacity may be left by then. Still, as the new data suggests, it should fine with what I’m doing.

 

[RonTCat]

 

[chillyWilly]

Standard or extended range? The standard battery can be charged to 100% without limitations, other than the time it takes. The extended range battery is a different chemistry and will lose capacity a bit quicker if you charge to 100% too often or worse, store it with the battery at capacity.

I thought the battery changed and up to a certain point 80% is recommended, after that 100% is ok.

 

[A-A-Ron]

I thought the battery changed and up to a certain point 80% is recommended, after that 100% is ok.

All older models, and any new model with the extended range battery are using Li-Ion batteries. You'll get the best life if you don't fully charge them (in the 80-90% range is best, but because Ford already caps off "full" and only uses a percentage of that, charging to 90% isn't actually 90% of the total capacity and is what Ford recommends).

Newer standard range batteries are LFP and do not have the issues Li-Ion have with charging to 100%. No reason not to charge them fully.

 

[RickMachE]

No thinking involved, nor opinions, when the manual tells you very clearly.

 

[A-A-Ron]

the manual tells you very clearly

Indeed, though it very clearly tells you different things depending on the revision. At least they seem to have stuck with the 90% recommendation for a few years now.

 

[Teslaeata]

For our 2024 MME that we purchased in January 2025, I am wondering if there is a sweet spot for charging. I was thinking 20-80, but thought I'd see what range others may use who have had MME longer.

G-

This is not a “do what I do irrespective of recommendations” post, it’s just my practical experience of charging which is dictated by work requirements imposed on the car.

108,000 miles & 44mths with HVB SoH at 93% which I think is pretty good and have charged to 100% very many times through the night when going out on road trip following day, otherwise to 95% when charge gets low - below 50miles on the GOM.

c25% of my charges are DCFC when I don’t go above 80% only really because I’m out on road waiting for the charge which slows right down at that part.

So, I suppose what I’m saying is that I believe if you don’t charge and leave at 100% for almost any time at all, just use, charge and enjoy the car?

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