What's the problem of charging your truck to 100% instead of 80% once in a while?

[CyberGus]

Between a SoC of 60-100%, there's less than a 1% increase in loss.

...at 25ºC. Are you storing your truck in a refrigerated garage?? My outside temp right now is closer to the 40ºC line, which shows a greater degradation.

The difference between 5% and 6% is not "one percent". Let's say I get a 2% raise and my co-worker gets a 3% raise. There is now a 1% difference in our salaries, but my co-workers raise was 50% higher than mine.

So if I'm degrading at 1%, and you're degrading at 2%, your degradation is 100% faster than mine.

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[Woodrick]

...at 25ºC. Are you storing your truck in a refrigerated garage?? My outside temp right now is closer to the 40ºC line, which shows a greater degradation.

The difference between 5% and 6% is not "one percent". Let's say I get a 2% raise and my co-worker gets a 3% raise. There is now a 1% difference in our salaries, but my co-workers raise was 50% higher than mine.

So if I'm degrading at 1%, and you're degrading at 2%, your degradation is 100% faster than mine.

Wall Street math.

More specifically, in degradation we are talking 5% vs 6%. That's only a 20% difference



Okay, let's take it as the graph shows it, 0.95 and 0.94.

I'm pretty sure the difference between those two is 1%.


Can't take the truth huh?

 

[CyberGus]

Wall Street math.

More specifically, in degradation we are talking 5% vs 6%. That's only a 20% difference



Okay, let's take it as the graph shows it, 0.95 and 0.94.

I'm pretty sure the difference between those two is 1%.


Can't take the truth huh?

You clearly don't care about degradation. Everyone else should heed the science.

 

[Maaz]

Don’t let the nerds ruin your experience. Charge to 100 if you need or if it brings you peace of mind. I charge to 100% once a week.

 

[Crissa]

Don’t let the nerds ruin your experience. Charge to 100 if you need or if it brings you peace of mind. I charge to 100% once a week.

The nerds are telling people it's okay to charge to 100 whenever you need to.

They're just saying, don't sweat charging it past 50-80% if you're not going to use it.

Choose a charge level that fits your most common emergency scenario, like getting to the hospital, or evacuating out of a fire/hurricane area, and then... Just don't worry unless you need more to get somewhere specific. Your truck can know when to start charging if you give it a leave time to be ready by.

-Crissa

 

[rudedawg78]

The nerds are telling people it's okay to charge to 100 whenever you need to.

They're just saying, don't sweat charging it past 50-80% if you're not going to use it.

Choose a charge level that fits your most common emergency scenario, like getting to the hospital, or evacuating out of a fire/hurricane area, and then... Just don't worry unless you need more to get somewhere specific. Your truck can know when to start charging if you give it a leave time to be ready by.

-Crissa

Well stated, as an Emergency Manager for the last 27 years, I really wish I could just charge to 100% everyday, just to be ultra ready for any incident or disaster. But....stupid battery degradation.

 

[Crissa]

Well stated, as an Emergency Manager for the last 27 years, I really wish I could just charge to 100% everyday, just to be ultra ready for any incident or disaster. But....stupid battery degradation.

Yeah, but if you do that you're not charging when it's cheapest, either.

I know how it is, better safe than sorry, but even on my Zero 50% gets me to the beach (and back) so any more when I don't have a specific trip planned is silly.

And I'm the sort that has multiple extinguishers and just replaced the fire detectors even though we're in a budget stretch due to the tech bubble.

-Crissa

 

[TexDox4Christ]

Hey CTers,

So, I have been here for a long time and noticed that most everyone charges to 80% to ensure maximum longevity of the battery. It makes sense and even watched YouTube videos to understand the science of it. However, to the best of my knowledge, it is okay to charge to 100% if you just don't let your truck sit that long before you drive.

Is it okay or not okay to charge to 100% periodically? I would like the maximum charge possible if I go to concerts/tailgating/camping/etc. The family and I go to concerts a lot and we want to be able to tailgate with no worry about battery drain due to the fridge/freezer/electric grill/coffee pot/fans/etc.

I feel that some people on this forum go stir crazy when someone charges their Cybertruck past the 80% mark.

What say you? This will be my first EV and my Cybertruck should be delivered next week!

If I am traveling 120 miles or more within 12 hours of start of charge I go 95 to 100 as going below 20% getting home can also effect battery life. Last weekend I did over 700 miles total and was leepfrogging between superchargers in west texas at over 100degrees! The reality of my need today exceeded the possible eventuality of battery longevity in the future.

 

[Crissa]

as going below 20% getting home can also effect battery life.

This is a myth; it's storage at a low level, not excursions. Which is why Teslas default to charging back to 50% when you plug in. There is already a safety pad at the bottom below 0% to do that for you.

The only thing you gain by not going below 20% on a drive is time spent at the next charging point.

-Crissa

 

[rudedawg78]

Yeah, but if you do that you're not charging when it's cheapest, either.

I know how it is, better safe than sorry, but even on my Zero 50% gets me to the beach (and back) so any more when I don't have a specific trip planned is silly.

And I'm the sort that has multiple extinguishers and just replaced the fire detectors even though we're in a budget stretch due to the tech bubble.

-Crissa

Kudos to your emergency preparedness!

 

[jookyone]

Arguing percentages is a fools errand for people that try to manufacture evidence for narratives that don't legitimately prove anything practical. Fight me, I can prove this 100% of the time.

In this case the relative unit of scale for the purpose of arguing battery degradation is either "miles of range" or "average annual mileage" relative to resale car values.

I've only had 2 Teslas where the battery degradation really mattered at all in practical usage. The early 90kwh battery packs were complete trash and degraded horribly. That being said "horrible" amounts to 19% in a Model X that has towed north of 50k miles requiring a lot of 100% supercharges and has 220k miles now with 90% daily at home. (257 -> 208)

All of the following cars have at least half their miles on the road supercharging if not more, charging 90% daily.

• An early nosecone P90D with 142k miles at 10% (270 -> 242)
• A late model 90D with 162k miles with 7% loss (294 -> 272)
• A P100D Model X with 101k miles at 9% loss (289 -> 263)
• An early P3D with 35k miles at 8% loss (299 -> 275)
  (299 miles my ass, never hit it. Was down to 280 after 5k miles)

None of those ending range specs affected driving in any way with the early Model X as the exception but it's been exceptional the whole time with what it has been asked to do.

I've probably driven more than most people on this forum, with much more supercharging than an average Tesla owner. All of these numbers I can live with and other than the early Model X (5k VIN), it has never affected my ability to use them in the manner with which I bought them. This would have more effect on resale value than anything practical.

I've said this a lot (I have 12k on the CT already mostly supercharging) and it reads 316 vs 318 now I'm still doing 90% daily. Charge for your use case (have enough miles during the day) the rest is babysitting resale value which anyone in the used Tesla game knows is like tracking crypto.

Cheers!

 

[TeslaFANa]

Yep no problem with occasional full charge. On my S I have 173 charges at 95% or above. 11% degradation after 290k. Enjoy the car/truck.

2018 model X, my wife charges to 90% every day, 100% charge for trips 20 x year = 100+ charges to full. 75k miles on it. 7.7% degradation.

 

[Jhodgesatmb]

Hey CTers,

So, I have been here for a long time and noticed that most everyone charges to 80% to ensure maximum longevity of the battery. It makes sense and even watched YouTube videos to understand the science of it. However, to the best of my knowledge, it is okay to charge to 100% if you just don't let your truck sit that long before you drive.

Is it okay or not okay to charge to 100% periodically? I would like the maximum charge possible if I go to concerts/tailgating/camping/etc. The family and I go to concerts a lot and we want to be able to tailgate with no worry about battery drain due to the fridge/freezer/electric grill/coffee pot/fans/etc.

I feel that some people on this forum go stir crazy when someone charges their Cybertruck past the 80% mark.

What say you? This will be my first EV and my Cybertruck should be delivered next week!

I haven't noticed anyone getting weird about charging levels here. Tesla recommends 20%-80% normally. I watched the 15,000-mile review by 'Out-of-Spec-Reviews' and was shocked to find that Kyle only charges to 60% daily. I read an article a year or so ago that showed very long life if you only charge to 65% so I switched my regular routine from 80% to 65% a couple weeks ago. I do not leave my truck plugged in (nor my other Teslas). When I go on trips, and occasionally locally when we are expecting more than 100 miles one way, I charge to 100% at the beginning. I suspect that everyone has their use cases and schedules, and only time will tell how long the CT batteries will last. Probably/hopefully a long, long time.

 

[Woodrick]

You clearly don't care about degradation. Everyone else should heed the science.

I absolutely do care.
The graph that you posted? I've known about it and studied it a long time ago. I'm quite familiar with it.
Degradation is a given. Your battery will degrade. If you think that there is anything that you can do to keep it from degrading, you are fooling yourself.

Degradation conversations are in how much the degradation is compared to some other scenario. And in vehicle use, it's impossible to compare anything, since everyone drives differently.

Of I believe all of the published studies, they are on other batteries. And batteries do vary significantly, even though they are supposedly the same "chemistry"

Remember it was only just over a year ago when Tesla changed the cars from having a 90% max recommended charge to 80%.

And since the following report covers all of the years of 90% charging, so many statements by the backset battery experts are dubious.
Average Tesla Model 3, Model Y Battery Degradation After 200,000 Miles Impresses (insideevs.com)

Yes, on AVERAGE, the Model 3/Y batteries are passing 200,000 miles.
Does that mean that they won't make it to 300,000? No, there's just not enough vehicles to have driven that far yet.

And it's interesting how people assume that the Model 3/Y and S/X have the same batteries, but yet they are showing different results.
That's because all Tesla batteries aren't the same.

 

[Outdoors]

The problem I have with the charts mentioned is the age of them and the cells they are attributed to.

Battery University charts have nothing to do with 2170 or even later than 2015 18650 cells. For sure not the new 4860 cells. It is generality about cells and education. Please all don't give credence to a fellow from sweden that bench tests in his garage and regurgitates 10 year old data.

Bottom line is read the new study from Tesla it came out last week. Use a car for 200k you won't have to worry about the battery at all. They pretty much say that. Trust the BMS. https://www.tesla.com/ns_videos/2023-tesla-impact-report.pdf

So I say we need more electrification. Not waiting 10 more years for studies on how good things are. When we propagate these ideas that to baby the battery to make sure it is good for...... What to stare at and say it is good? These ideas have very little when I look at 100k cars compared to mine. The range difference is less than 2 miles. So we are all stupid or some are and some aren't.

These ideas of charging to 50% move people away from EV's not to EV's. Why do I need to charge to 50% in my EV when I can fill up my gas car to full? Crickets....................

I have mentioned early I don't subscribe to the 50% rule and have more miles than most everyone here. Yet my range is beyond anyone left. Charge to 90% every day.

Use the truck folks. Don't fall for the 50% unless it really is convenient for ya.

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