Tesla wall connector habits

[Attica]

Hello
I am retired and just don’t drive all that much is it better to charge up to 80% less frequently or is it better for battery degradation to charge to say 50% more frequently? I have only used my Tesla wall connector in my garage I have never used a supercharger.

2023 Model Y Long Range

 

[SkyDog]

General consensus is to keep a lower state of charge if that's all you need. So 50% would be better than 80%.

 

[Goobers]

There are some YouTube videos about a study made by a university researcher that claims multiple “shallow” charge cycles have less degradation than fewer deeper charge cycles.

Something like charging/discharging 10% everyday has less effect than 70% once a week.

Though they also say the difference is pretty insignificant.

Personally, I treat this the same as which state of charge to hit. 50% vs 80% isn’t that significant to me. Or rather, I haven’t seen anything that has definitively convinced me.

My current habit is to charge up to 75% (3/4 is just easier on my imagination than 4/5) and plug in every night. Though I have only basic level 1 charging, so it’s effectively the only way I can go. I plug in long enough to recoup about 25-30%, which is how much I use on an average day. I’ll use a supercharger if necessary (three times so far, in the year I’ve owned my MYP).

 

[zoomer0056]

From reading numerous posts by @AAKEE , I have set my limit to 55%. If I do an errand in town I'll plug when i get home. Even if the car is only down 2%. I never leave the car plugged in. If I need to go to Los Angeles, I'll charge just before leaving to 85% which is good for round trip. Then charge when I get home to 55%.

Thank you for calling it a wall connector. Most people erroneously call it a wall charger.

 

[Attica]

Thank you guys for your posts I appreciate it.
On another note I also own a Toyota Tacoma since at the time my daughter had graduated college and moved into a apartment as well as helping her move she needed a dependable vehicle to start her new job. I belong to tacomaworld.com a online forum as well, I have posted a few questions on that forum since I wasn’t very familiar with it when I bought it, long story short the replies and posts on teslamotorclub are pleasant and well informed in comparison.

 

[AAKEE]

There are some YouTube videos about a study made by a university researcher that claims multiple “shallow” charge cycles have less degradation than fewer deeper charge cycles.

Something like charging/discharging 10% everyday has less effect than 70% once a week.

Yes, smaller cycles wear less.

Cyclew are often counted in Full Cycle Equivalent (FCE), meaning 1 FCE = the amount of cycles needed to reach 100%.
Thats two 50% cycles or ten 10% cycles.

With FCE we can directly se which is better, the higher FCE number for a ceetain degradation the less degradation per mile.

But cycles are such little part of the degradation that we do not need to adjust for that as calendar aging causes about 10 times the degradation versus cycles early in the battery life.

Though they also say the difference is pretty insignificant.

Personally, I treat this the same as which state of charge to hit. 50% vs 80% isn’t that significant to me. Or rather, I haven’t seen anything that has definitively convinced me.

You havent looked that deep inte the facts then. There’s no need to though, if you’re happy with standard degradation rate.

My current habit is to charge up to 75% (3/4 is just easier on my imagination than 4/5) and plug in every night. Though I have only basic level 1 charging, so it’s effectively the only way I can go. I plug in long enough to recoup about 25-30%, which is how much I use on an average day. I’ll use a supercharger if necessary (three times so far, in the year I’ve owned my MYP).

 

[Goobers]

Thank you guys for your posts I appreciate it.
On another note I also own a Toyota Tacoma since at the time my daughter had graduated college and moved into an apartment as well as helping her move she needed a dependable vehicle to start her new job. I belong to tacomaworld.com a online forum as well, I have posted a few questions on that forum since I wasn’t very familiar with it when I bought it, long story short the replies and posts on teslamotorclub are pleasant and well informed in comparison.

Oh, I’m sure the ones that will piss you off will show up sooner or later. I know they have for me. I just try my best to ignore them on any forum.

You havent looked that deep inte the facts then. There’s no need to though, if you’re happy with standard degradation rate.

Considering most post, like yours, are more anecdotal. Very few if any link to actual case studies (not just random forums of people using EVs). And even those don’t say thing more than what I’ve already said, it’s not significant.

What is it you even claim is “standard degradation?”

 

[Goobers]

Oh, too late to edit.

Wanted to add, “never mind, not in the mood to listen to more anecdotal claims.”

 

[AAKEE]

What is it you even claim is “standard degradation?”

English is not my native language.

I did mean the usual degradation that people get from the usual usage, like charging to 80% and mostly have the battery SOC above 55%.

 

[MichaelSte2022]

From reading numerous posts by @AAKEE , I have set my limit to 55%. If I do an errand in town I'll plug when i get home. Even if the car is only down 2%. I never leave the car plugged in. If I need to go to Los Angeles, I'll charge just before leaving to 85% which is good for round trip. Then charge when I get home to 55%.

Thank you for calling it a wall connector. Most people erroneously call it a wall charger.

You want to try to keep it above 19%. So 20% minimum when done for the day. This is so the battery health stays longer for normal charging.

 

[ucmndd]

You want to try to keep it above 19%. So 20% minimum when done for the day. This is so the battery health stays longer for normal charging.

No. There are ZERO negative battery health effects related to discharging below 20%. Lithium ion cells are perfectly happy being stored indefinitely at low single digit percentage states of charge.

There is no magic damage switch at 19%.

There are some other valid reasons to stay above 20% - the car disables some features below 20% to maintain state of charge like sentry mode, cabin overheat protection, etc.

A note on forum etiquette: it’s generally bad form to resurface posts that are months old just to provide an additional answer to a question that has already been well covered.

 

[zoomer0056]

it’s generally bad form to resurface posts that are months old just to provide an additional answer to a question that has already been well covered

R U serious? So many newbies that have a LOT of catching up. You'll never school them all on all the info thats passed by. Ha. Only time can do that. I can't keep up myself.

 

[AAKEE]

You want to try to keep it above 19%. So 20% minimum when done for the day. This is so the battery health stays longer for normal charging.

Like @ucmndd says, there is no negative effects below 20% except that for example Sentry and cabin overheat protection is disabled.

The ”20%” us a battery myth.

All research shows the same, and no research supports the battery myths floating around these forums.

This is a good sum up* of literally hundreds of research reports. It shows the intensity of calendar aging/degradation from time for the three most common lithium battery chemistries.

The lower SOC, the better from a calendar aging point of view.

*) It is actually from actual tests, but it can serve as the average findings from lot of other tests. Only shows the first 10 months of calendar aging and the rate reduces with the square root of time so it takes in total about 40 months to double the defradation in the chart, and another 120 months (160 months total time) to double it again.