Do you occasionally charge to 90%?

[bobbyg123]

Hi everyone,

I set my charging max to 80% like a lot of people do, but I’m wondering how many of you crank it up to 90% or even 100% for the occasional longer trip. Has there been any data that talks about this being potentially harmful to the battery?

 

[Edsonbarron]

I’ve been charging to 90% since the day I got it. The “overcharging prompt doesn’t show up on the screen unless you charge to more than 90% a few times in a row. So 90 sounds good to me.

 

[jjrandorin]

Hi everyone,

I set my charging max to 80% like a lot of people do, but I’m wondering how many of you crank it up to 90% or even 100% for the occasional longer trip. Has there been any data that talks about this being potentially harmful to the battery?

There is more data than you could ever want, in the dedicated thread about battery health, which you can find here:

Range Loss Over Time, What Can Be Expected, Efficiency, How to Maintain Battery Health

When the eventual day comes I decide to move on from this car, I will probably change my charging habits away from an "80% every day" strategy. For an NCA battery, it is likely that the optimal battery preservation charging method for daily use is something like: Charge to finish shortly...

teslamotorsclub.com

Search for posts in that thread by @AAKEE and you will find more data than you could want on this topic.

 

[Tam]

...I set my charging max to 80% like a lot of people do...

I've set my 3 cars at 90% nightly for the past 10 years. I do set them at 100% for a road trip.

 

[jsmay311]

I do 80% in the warm months, 90% in the cold months, and 100% before a road trip.

 

[bobbyg123]

Thanks guys. I live in the mild Pacific NW and garage my car, so I’m feeling ok about charging to 90% occasionally, even in the summer.

Big help. Thanks again.

 

[Candleflame]

Hi everyone,

I set my charging max to 80% like a lot of people do, but I’m wondering how many of you crank it up to 90% or even 100% for the occasional longer trip. Has there been any data that talks about this being potentially harmful to the battery?

Charging to 100% just means you use 2 cycles as opposed to 1 cycle on a full discharge as opposed to 90% ( or better said 90% offers twice as much cycle life as 100%)But the effect diminshes with shallower discharges and most people dont do that anyway. I. E. You stsrt with 100% and then charge at 5% which is essentially just a 90% cycle anyway
So its fairly irrelevant. As far as storage is concerned 100% is still better than 80%.

 

[ucmndd]

Charging to 100% just means you use 2 cycles as opposed to 1 cycle on a full discharge as opposed to 90%. But the effect diminshes with shallower discharges and most people dont do that anyway. I. E. You stsrt with 100% and then charge at 5% which is essentially just a 90% cycle anyway
So its fairly irrelevant. As far as storage is concerned 100% is still better than 80%.

lolwut?

 

[OldPro]

Hi everyone,

I set my charging max to 80% like a lot of people do, but I’m wondering how many of you crank it up to 90% or even 100% for the occasional longer trip. Has there been any data that talks about this being potentially harmful to the battery?

Always 100% only for a long trip. Otherwise for daily use 80%

 

[AAKEE]

I charge to 100% whenever the range is needed. I have No worries about that.
I have averaged about once a month since the car was new.

100% cycles wear more than lower SOC targets.
Continously charging to 100% will shorten the cycle life to about half compared to 80%.
For a trip that need 100% there is nothing wrong in using that.

Its not recommended to charge above 90% on a daily basis when that range is not needed.

I stay below 55% SOC any time I do not need the range as I know calendar aging is the main battery degrador during the first years of a battery life.

My batterys degradation is lower than other M3P 21, so the low SOC approach work.

 

[Candleflame]

lolwut?

if you consider a 100 - 0% discharge 1 cycle then doing 90% to 0% puts about half the stress on the battery and double the life. I.e. doing a single 100% to 0% counts similar as doing 2x 90% to 0% discharges. this is the main reason the car is limited to 90% SOC for daily use. Contrary to popular belief storing the battery at 100% isnt actually that bad.

 

[UncertainTimes]

I’m super edgy and supercharge to 100%

 

[Soul Surfer]

We have a trip coming up in a few weeks. The last time we drove from Toronto to Montreal, I had charged up to 100% several times. In retrospect I don’t think I would go to that anymore, rather I would go to a max of 95% and have access to regen that way.

 

[3Volts2aTes]

Pretty much we go anywhere between 50 and 95 depending on the upcoming couple of days, and 100 when we are planning on leaving the next morning on a trip.

We don’t “need” 80 on a daily basis, so we just bounce it around depending on a mood. Some days 50, some 75, etc. All for no real real reason except to allow the BMS to get some sleep time at different states…which may or may not ever matter. But it makes a fun game.

 

[TigerNinety]

There is more data than you could ever want, in the dedicated thread about battery health, which you can find here:

Range Loss Over Time, What Can Be Expected, Efficiency, How to Maintain Battery Health

When the eventual day comes I decide to move on from this car, I will probably change my charging habits away from an "80% every day" strategy. For an NCA battery, it is likely that the optimal battery preservation charging method for daily use is something like: Charge to finish shortly...

teslamotorsclub.com

Search for posts in that thread by @AAKEE and you will find more data than you could want on this topic.

Is there a TL;DR somewhere for the “more data than you could ever want” in that thread?

 

[Lindenwood]

I charge to 90% every day to maximize available power for the commute home. That right pedal is what helps me shake off the longer days…otherwise I’d just have alcohol.

 

[RayK]

My usual top limit is 90%. I either get there using a CHAdeMO adapter at a ChargePoint station or a Supercharger. Rarely do I stop at less than 90%, doing so only if the SC station is being heavily used - favorite place is 72kW Urban chargers. Around town I recharge around 45-50%. On trips I get down to 25-30% before stopping to charge. I only charge to 100% just prior to a long trip. Car is four years old with 25K miles and 100% range of 298 miles. Been charging this way for 3 years.

 

[jjrandorin]

Is there a TL;DR somewhere for the “more data than you could ever want” in that thread?

Search for posts by @AAKEE and look for thumbnails with charts in them. @AAKEE has posted the same charts, with the same explanation, dozens and dozens of times in an effort to explain (and re explain, and re re explain, and re re re re re re re re re explain) the information they have researched on this, with the patience of a saint.

 

[thesmokingman]

I never charge to 90, instead to 60 daily. Only go higher when I actually need that range.

 

[paradoxical]

I charge to 90% every day to maximize available power for the commute home. That right pedal is what helps me shake off the longer days…otherwise I’d just have alcohol.

I read this and was really confused because I didn't remember posting this last night. You took the words right out of my mouth haha.