Ideal Charging Frequency to charge to 80%

[Maxx]

Apologies for the silly question...I only have the ford mobile charger. I usually do not charge at home as I only have a regular outdoor outlet for level 1 charging. is there a way to plug in the vehicle but not charge, like to just keep the battery warm and in good shape but not draw a lot of electricity?

With these you can plug your Ford charger into your washer/dryer 240V outlet:

https://www.amazon.com/dp/B0821HJMJB?ref=ppx_yo2ov_dt_b_fed_asin_title

https://www.amazon.com/dp/B08XNX8KQ6?ref=ppx_yo2ov_dt_b_fed_asin_title

Edit: Sorry my bad. You can not do this with your Ford mobile charger. Forgot Ford charger is not adjustable and you may set your house on fire. I set my adjustable charger to 24 A. If you get an adjustable charger or 24 amp charger, you can do this.

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[topher10]

To extend on this conversation: Does speed/rate/amps of charging at home (Level 2) impact battery longevity? My daily commute is about 25 miles roundtrip, plus I have a second car (convertible) that I drive some days. So, day to day, I use relatively little battery power and generally charge every 2nd or 3rd day (keeping between 60-80%). Since these are small charges, I can reduce the amps of the charger from 48 down to 28 and still be ready the next morning.

TLDR: Would charging more slowly but for longer be better than faster (higher amp) charges for a shorter time each night?

 

[Grumpy2]

I have not stumbled over any scholarly study on that, probably there isn't anyone with money to support that study.
I suspect no appreciable difference ...

 

[Firn]

To extend on this conversation: Does speed/rate/amps of charging at home (Level 2) impact battery longevity? My daily commute is about 25 miles roundtrip, plus I have a second car (convertible) that I drive some days. So, day to day, I use relatively little battery power and generally charge every 2nd or 3rd day (keeping between 60-80%). Since these are small charges, I can reduce the amps of the charger from 48 down to 28 and still be ready the next morning.

TLDR: Would charging more slowly but for longer be better than faster (higher amp) charges for a shorter time each night?

I have not seen a study that dives into the difference for such LOW charge rates. Typically studies are done around a "C" rate, and iirc one C is the norm (the full capacity of the battery in one hour is one "C"). A 4C battery would be able to go from completely dead to 100% in 15 minutes.

With L2 charging at 48 amps you are around one TENTH of one C, which is very low. 24 amps would be a half that, but even 80 amp charging would still be less than one fifth of one C. These are very slow and comfortable numbers for charging from everything I have seen. But again, the only studies I remember seeing were alongside the lines of one C, 2-C, maybe half of one C, etc. Yes, slower is better, but there is a point of diminishing returns.

 

[Firn]

I, personally, find that graph really misleadning.

The 25-100% delta will reach the same throughput 7.5 times faster than the 65-75% cycle, so if they were scaled to look at throughput you'd be looking at a 92% vs. 90% capacity which is not a whole lot, but the graph makes it seem like you'r dealing with a dead battery vs. one with 92% capacity left at the point in time which simply isn't true.

The only ones you can compare is the two that are fixed to 50% and 60% respecively where the conclusion is that it's "bad" to always charge to 100% - which we knew already.

The Battery University article there isn't perfectly clear on the testing however it is the norm to run the battery through the same number of "cycles" (100% of capacity) for all tests.
In a case similar to the graph linked 25% to 50% (25%) would be done 4 times, 25% to 75% (50%) would be done twice, and 0% to 100% (100%) would be done once, to count a "cycle" of the battery.

 

[GoodSam]

I, personally, find that graph really misleadning.

The 25-100% delta will reach the same throughput 7.5 times faster than the 65-75% cycle, so if they were scaled to look at throughput you'd be looking at a 92% vs. 90% capacity which is not a whole lot, but the graph makes it seem like you'r dealing with a dead battery vs. one with 92% capacity left at the point in time which simply isn't true.

The only ones you can compare is the two that are fixed to 50% and 60% respecively where the conclusion is that it's "bad" to always charge to 100% - which we knew already.

Does this table below reflect what you are getting at? Mini-cycles look good for range, but one has only traveled 1/3 as far as the others?

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