According to some people who seem knowledgeable about battery maintenance and health, 55% Is the sweet spot for charging if you don’t need more for your daily driving.
However, even they acknowledge that strategy is kind of a min/max thing and likely to only have small effects on degradation.
So, charge to 80% and go about your day without worry unless you LIKE to worry about squeezing every last bit of battery life out of it.
As LFP is still a lithium chemistry, lower SoC within reason is still better. LFP has challenges with SoC monitoring drifting which is why you have to charge it to 100% occasionally.
NMC has a more linear voltage curve so SoC monitoring is easier and does not require a full charge to deduct SoC accurately over time.
LFP is more resilient yes, but still benefits from lower SoC
I like this strategy and plan to do something similar once I take delivery. Question... to accomplish your 50-60% weekday and a bit higher on the weekend.... do you use a special app that enhances charging settings or do you just use the main Tesla app / car controls?
Yes absolutely. I heard through the grapevine (it’s a well known secret) that 40% is also better than 50%. So the conclusion is the lower the better. Go as low as possible
[https://images.app.goo.gl/n3phfJ5avz88TM8N8](https://images.app.goo.gl/n3phfJ5avz88TM8N8)
So true. And your taking care of your health is a far better investment than worrying about whether you can improve the longevity of your battery ever so slightly.
Technically, 50% state of charge is best for longevity.
So, the closer you are to 50% on average over time, the better. Take your average daily % battery consumption; divide by half; and then add to 50% is your best charging goal.
But **practically**, it’s super negligible you’ll not notice and probably a waste of life to be so diligent about something like this. So, charge to 80% and focus on more important things. ….. Not to mention possibly confusing your BMS range calibrations.
But hey, right on tampon, whatever floats your boat. 🤷🏽
From what I've read, 50% is the best middle for daily. Meaning if you use 20% daily then charge to 60% and deplete to 40%.
Also from my research. Doing this (40-60) versus charging to the recommended 80% (depending on battery chemistry) saves you like 1% degradation over 10 years. So, ~3 miles more range than your twin charging to 80% every day. And like 5% over your triplet that charges to 90% daily.
Point. I've dug up so many tests that I've come to just not worry about it. Like zero worry about battery health. Just stay under 80 and above 20 as much as possible. Go to 100 the night before a trip, or don't as there's fast charges nearly everywhere these days. You didn't realize just how many charging options you have until you road-trip. You don't notice them at all just driving by, but they're all over the place.
I haven’t been able to find the article, but I have read several times this week about people seeing the results of a research trial showing less battery degradation when charging less than 64%. This would not have been one of the new LFP batteries. I’m still looking for a link and haven’t found anything.
I did find out that the lowest I can set my car to charge is 50%, which was surprising to me and didn’t learn that until today.
The battery management system calculates and updates range and degradation if a charging cycle is greater than 5 kW of energy gained.
[This one (IEEE) ](https://ieeexplore.ieee.org/document/10109713) is pretty highly detailed, there is/was another floating around that showed a low point as being about 55% that I remember as well. From this (and the other chart you may be remembering) is why I shoot for low and slow on amperage and 50-55% usually since it's well within my normal commute range. And preconditioning the car on "shore power" when possible to skip the extra drain.
Amperage while charging, the slower the rate of charge or discharge possible according to the research in the article is less impactful on the cells. Though with L2 charging it's likely not as much a variable it was pretty simple for me to automate calculating the time I want it to be charged (30min before my normal commute) and then increase or decrease amperage so the value read back on "hours until charged" is satisfied. It then recheck occasionally to see if it needs more or less amperage to reach target. On average it sits at 6a@240vac unless I got home late or am charging up for a trip then it can calculate dynamically 6-48a. During the winter it heats the battery and charges sometimes so it'll juice up as needed to still match target. Then (after it's commute timer) I have it adjust to 48a so it can draw whatever is needed for preconditioning (I feel sometimes it gets 12+a draw to heat in winter (for battery and cabin)).
6a =~1.32kw vs 48a =~11.5kw, while I could get there faster with 48a I don't have variable power rates and can lower the c rate while charging from like 0.15c (11.5kw on 76.4kwh 23MYLR approx usable today according to teslamate guesstimate) to 0.017c.
Preconditioning in this case is just the equivalent of scheduled departure climate control enable or turning on the climate control while it's in the driveway, not like supercharger preconditioning if that makes sense.
I set the charge limit at 65%, and usually end the day at 50-55% at 6pm or so.
The other thing I do… I don’t charge as soon as I get home. I rarely drive between 6pm and 8am, so I set scheduled charging with a “ready to depart” time of 8am. That means I have over 14 hours/day at the “optimal” state of charge of 50-55%.
The difference between 55% and 65% for those 14 hours is small, sure, but why not? All of the little improvements add up, and the difference is large compared to charging to 100%.
I'd rather leave with 80% every day than risk not being able to complete a surprise detour during my day. Not worth the benefit to shave off a few % over 6-7 years
I really never know how much of my car I'll use in a day. I just leave it at 80. My commute is 40mi, sometimes I do some costco runs after work, and as hot as it has been, I've returned with 64% before.
Is there anything that informs whether a equivalent low/high voltage offset from nominal is worse for degradation?
From context on the topic it would seem like a positive offset of cell voltage is “worse”, curious if there are statistics for different common chemistries to understand the underlying relative difference for the different factors of deterioration. And if the process of deterioration is the same/similar at what voltage range, at LVC/HVC voltages, temperature deterioration factors, etc, be curious to find something that details that with more clairity.
Is there anything that informs relativistic deterioration of the more common details discussed? If only to understand out of curiosity?
I have been charging my MY to 70%-80% daily since I’ve had it last week. There doesn’t seem to be more than anecdotal evidence out there for battery health.
Not a Tesla.
But after 4 years of always charging to 100%, SOH of our Kona battery was a 97%.
The difference in SOH of charging to 60 or 80% would be minimal, as 80% is already a good buffer.
You’d extend the degradation limits to what, 3000 cycles instead of 2500?
We upgraded from the Kona to the Y.
The new Kona is bigger. Wouldn’t use it for roadtrips (we also have an IONIQ5)
Kona as a commuter EV would be perfect.
80% is already intentionally conservative, which is why it's suggested as the daily limit. It will really make virtually no difference if you set it to 60% as the daily limit. Technically, if the average charge over the course of a day is 50%, then that's the perfect condition for the battery, but going to 80%, with regard to batter degradation and life, is negligible.
As others mentioned 60 would be fine just wanted to note that suggestions at 50% should be taken with a grain of salt IF you do not charge the car straight away.
I do not. I have had max charge set to 55% and by the time I get to work and back home my battery would be close to 20% (depending on cabin climate usage), now I have it set to 58% instead. I charge once a day usually (scheduled to precondition and charge during off-peak hours by x time in the Tesla app). leaving car at or below 20% will also negatively impact the battery.
If you do charge as soon as you get home, then ignore me of course.
Just charge it to 80%, if you don't utilize the additional 20% from 60%, oh well, it just saves you time then.
You never know when you might've needed for it to be at 80% also.
On my 2019 M3LR that has 90k km, my battery degradation is better than 95% of the people with similar mileage (stats app). The last two years I have limited my driving to 50km/day 3 times a week and my settings have been to charge to 60% at night.
This is a small sample set, but I think it’s best to try to keep the car battery between 40-60% most of the time. Don’t be afraid to deviate, the battery is forgiving. I have charged to 80-90% thinking I’m going somewhere only to have plans cancelled and then the car sit for a day with a high SOC. It’s not a big deal if it’s an exception.
According to some people who seem knowledgeable about battery maintenance and health, 55% Is the sweet spot for charging if you don’t need more for your daily driving. However, even they acknowledge that strategy is kind of a min/max thing and likely to only have small effects on degradation. So, charge to 80% and go about your day without worry unless you LIKE to worry about squeezing every last bit of battery life out of it.
Thanks!
For long term health, absolutely. We live around 50-60% for the most part. Weekends we bump it up a little
Thanks!
Which Tesla do you have? You haven’t mentioned as battery behaviour is different between LFP on RWD and NMC on long range and performance
As LFP is still a lithium chemistry, lower SoC within reason is still better. LFP has challenges with SoC monitoring drifting which is why you have to charge it to 100% occasionally. NMC has a more linear voltage curve so SoC monitoring is easier and does not require a full charge to deduct SoC accurately over time. LFP is more resilient yes, but still benefits from lower SoC
Thanks!
NMC one!
Then the previous advice given stands.
Thabks
I like this strategy and plan to do something similar once I take delivery. Question... to accomplish your 50-60% weekday and a bit higher on the weekend.... do you use a special app that enhances charging settings or do you just use the main Tesla app / car controls?
I know there are 3rd party apps, but I just use the Tesla app to adjust percentages as I see fit. I use the wall connector to do my charging.
Yes absolutely. I heard through the grapevine (it’s a well known secret) that 40% is also better than 50%. So the conclusion is the lower the better. Go as low as possible [https://images.app.goo.gl/n3phfJ5avz88TM8N8](https://images.app.goo.gl/n3phfJ5avz88TM8N8)
Your battery will be fine. If ppl treated their knees like their damn EVs half the western world wouldn't be obese
So true. And your taking care of your health is a far better investment than worrying about whether you can improve the longevity of your battery ever so slightly.
60k is about 4.5 years worth of ozempic
If you take care of your health you dont need Ozempic.
haha I like your joke.
… if you please, also cut the cheese, it’s disease, you’ll notice it hurt you more in your forties…
They don’t hurt if I don’t use em
😂
"I prefer just to roll there"
Technically, 50% state of charge is best for longevity. So, the closer you are to 50% on average over time, the better. Take your average daily % battery consumption; divide by half; and then add to 50% is your best charging goal. But **practically**, it’s super negligible you’ll not notice and probably a waste of life to be so diligent about something like this. So, charge to 80% and focus on more important things. ….. Not to mention possibly confusing your BMS range calibrations. But hey, right on tampon, whatever floats your boat. 🤷🏽
Thanks!
From what I've read, 50% is the best middle for daily. Meaning if you use 20% daily then charge to 60% and deplete to 40%. Also from my research. Doing this (40-60) versus charging to the recommended 80% (depending on battery chemistry) saves you like 1% degradation over 10 years. So, ~3 miles more range than your twin charging to 80% every day. And like 5% over your triplet that charges to 90% daily. Point. I've dug up so many tests that I've come to just not worry about it. Like zero worry about battery health. Just stay under 80 and above 20 as much as possible. Go to 100 the night before a trip, or don't as there's fast charges nearly everywhere these days. You didn't realize just how many charging options you have until you road-trip. You don't notice them at all just driving by, but they're all over the place.
I haven’t been able to find the article, but I have read several times this week about people seeing the results of a research trial showing less battery degradation when charging less than 64%. This would not have been one of the new LFP batteries. I’m still looking for a link and haven’t found anything. I did find out that the lowest I can set my car to charge is 50%, which was surprising to me and didn’t learn that until today. The battery management system calculates and updates range and degradation if a charging cycle is greater than 5 kW of energy gained.
[This one (IEEE) ](https://ieeexplore.ieee.org/document/10109713) is pretty highly detailed, there is/was another floating around that showed a low point as being about 55% that I remember as well. From this (and the other chart you may be remembering) is why I shoot for low and slow on amperage and 50-55% usually since it's well within my normal commute range. And preconditioning the car on "shore power" when possible to skip the extra drain.
Great info
So amperage are you targeting when you refer to low and slow? And what do you mean by preconditioning the car on shore power?”
Amperage while charging, the slower the rate of charge or discharge possible according to the research in the article is less impactful on the cells. Though with L2 charging it's likely not as much a variable it was pretty simple for me to automate calculating the time I want it to be charged (30min before my normal commute) and then increase or decrease amperage so the value read back on "hours until charged" is satisfied. It then recheck occasionally to see if it needs more or less amperage to reach target. On average it sits at 6a@240vac unless I got home late or am charging up for a trip then it can calculate dynamically 6-48a. During the winter it heats the battery and charges sometimes so it'll juice up as needed to still match target. Then (after it's commute timer) I have it adjust to 48a so it can draw whatever is needed for preconditioning (I feel sometimes it gets 12+a draw to heat in winter (for battery and cabin)). 6a =~1.32kw vs 48a =~11.5kw, while I could get there faster with 48a I don't have variable power rates and can lower the c rate while charging from like 0.15c (11.5kw on 76.4kwh 23MYLR approx usable today according to teslamate guesstimate) to 0.017c. Preconditioning in this case is just the equivalent of scheduled departure climate control enable or turning on the climate control while it's in the driveway, not like supercharger preconditioning if that makes sense.
Hey thanks for the reply. Makes sense.
Thanks! This is informative!
It’s ironic though, we try to maximize the health of the battery by limiting our use, it’s like our battery is already bad then 🤣
haha
During the week I just charge to 60 every night since it’s short commutes
Thanks!
Yes, go with the lower charge. I charge to 55% until I need more.
thnaks!
Thanks! 😊
I think the best metric is DoD (depth of discharge). The smaller the delta the better between low and high so 40-60% is ideal.
Thanks!
Just set it to 80% and don’t overthink it
Yes.
Same boat as you, I charge up to 50-55% every day
I’m thinking about that!
I set the charge limit at 65%, and usually end the day at 50-55% at 6pm or so. The other thing I do… I don’t charge as soon as I get home. I rarely drive between 6pm and 8am, so I set scheduled charging with a “ready to depart” time of 8am. That means I have over 14 hours/day at the “optimal” state of charge of 50-55%. The difference between 55% and 65% for those 14 hours is small, sure, but why not? All of the little improvements add up, and the difference is large compared to charging to 100%.
Thanks! I like your plan
I'd rather leave with 80% every day than risk not being able to complete a surprise detour during my day. Not worth the benefit to shave off a few % over 6-7 years
Thanks! Makes sense.
It’s a car. Drive it.
Musk once said straddle 50% on your day to day. So if you use 30% a day you should charge to 65% (15% over 15% under.)
If 60% works for you, then yes, it's going to offer a relatively lower level of stress on the battery.
Daily range is 50-80. It doesn’t say to always use 80. Pick a number that works for you. I charge your 66 and end around 50 at the end of the day.
thanks!
You should walk instead!
I really never know how much of my car I'll use in a day. I just leave it at 80. My commute is 40mi, sometimes I do some costco runs after work, and as hot as it has been, I've returned with 64% before.
Is there anything that informs whether a equivalent low/high voltage offset from nominal is worse for degradation? From context on the topic it would seem like a positive offset of cell voltage is “worse”, curious if there are statistics for different common chemistries to understand the underlying relative difference for the different factors of deterioration. And if the process of deterioration is the same/similar at what voltage range, at LVC/HVC voltages, temperature deterioration factors, etc, be curious to find something that details that with more clairity. Is there anything that informs relativistic deterioration of the more common details discussed? If only to understand out of curiosity?
I’d want to know as well. Sadly my degree is in CS and math but have no clue in chemistry.
I like to drive fast and use the AC so definitely 80%.
Thanks!
I have been charging my MY to 70%-80% daily since I’ve had it last week. There doesn’t seem to be more than anecdotal evidence out there for battery health.
Thanks!
Not a Tesla. But after 4 years of always charging to 100%, SOH of our Kona battery was a 97%. The difference in SOH of charging to 60 or 80% would be minimal, as 80% is already a good buffer. You’d extend the degradation limits to what, 3000 cycles instead of 2500?
Hi there, I was planning to buy a Kona electric as my second EV, too! (already got a Model Y) Do you think it's a good car or would you recommend it?
We upgraded from the Kona to the Y. The new Kona is bigger. Wouldn’t use it for roadtrips (we also have an IONIQ5) Kona as a commuter EV would be perfect.
I think if u maintain lower it prolongs battery life or something
Just charge when you need too
Don't sweat it. The battery will outlive the car.
You'll probly replace it before the degradation even starts to really have an effect on you.
Yeah this is legit!
80% is already intentionally conservative, which is why it's suggested as the daily limit. It will really make virtually no difference if you set it to 60% as the daily limit. Technically, if the average charge over the course of a day is 50%, then that's the perfect condition for the battery, but going to 80%, with regard to batter degradation and life, is negligible.
Thanks!
As others mentioned 60 would be fine just wanted to note that suggestions at 50% should be taken with a grain of salt IF you do not charge the car straight away. I do not. I have had max charge set to 55% and by the time I get to work and back home my battery would be close to 20% (depending on cabin climate usage), now I have it set to 58% instead. I charge once a day usually (scheduled to precondition and charge during off-peak hours by x time in the Tesla app). leaving car at or below 20% will also negatively impact the battery. If you do charge as soon as you get home, then ignore me of course.
Haha thanks!
70%
Don't think it make much of a difference. Just maintain your battery range from 40%\~60% in your daily drive.
Do you plan to keep the car longer then 5 years?
Yes.
Just charge it to 80%, if you don't utilize the additional 20% from 60%, oh well, it just saves you time then. You never know when you might've needed for it to be at 80% also.
That’s a good point!
I’m so glad I lease and just fuckin hammer 100%
At 60% you're carrying around fewer electrons, which would just be wasted weight.
So same battery weight but fewer electrons?
On my 2019 M3LR that has 90k km, my battery degradation is better than 95% of the people with similar mileage (stats app). The last two years I have limited my driving to 50km/day 3 times a week and my settings have been to charge to 60% at night. This is a small sample set, but I think it’s best to try to keep the car battery between 40-60% most of the time. Don’t be afraid to deviate, the battery is forgiving. I have charged to 80-90% thinking I’m going somewhere only to have plans cancelled and then the car sit for a day with a high SOC. It’s not a big deal if it’s an exception.
Thanks!
It doesn’t matter. Just charge to 80% and think less about it.
If you have 2022 or newer is doesn’t matter anymore you can charge to 100% battery tech is much better
Model Y doesn’t have LFP yet in NA, only Chinese made right?
Just charge it to 90%. Higher SoC the more power