Do I really need to stick to recommended charging range of 20-80% ?

[agordon117]

I think it's a bit silly to worry about when it comes with a 150,000 mile/8 year powertrain warranty that includes early death of the battery.

Just charge it as high, and drain it as low, as your daily needs require. It goes 0-100% for a reason.

Yeah but they will only replace the pack if it has degraded 30%, which is almost impossible in that timeframe unless you got very unlucky with your pack.

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[HaulingAss]

Yeah but they will only replace the pack if it has degraded 30%, which is almost impossible in that timeframe unless you got very unlucky with your pack.

Exactly! That's my point. It would be like worrying about flooring your ICE truck, or towing a heavy trailer with your ICE truck, because it might lead to an early death of the engine and transmission.

Don't get me wrong, I take good care of my battery, right now it's only charged to 70% because that's all I need, even accounting for contingencies. If I need more range, I wouldn't hesitate to charge to 100%, because that's what it's there for.

 

[CyberGus]

The BMS will protect you from destroying your pack, but there are behaviors that will minimize degradation: basically, spend as little time as possible at high SoC.

 

[inierdepry999]

If you’re worried about range charge to 120%.

You can also throw a gas generator in the trunk and charge right on the spot

Honestly, I'm more old-school about batteries; I wouldn't risk deep discharge.

 

[HaulingAss]

You can also throw a gas generator in the trunk and charge right on the spot

Honestly, I'm more old-school about batteries; I wouldn't risk deep discharge.

Tesla is more old school about batteries than you. They set the lower discharge limit at a safe place, it's not really "zero". What you don't want to do is leave it at zero for an extended period of time - it's OK to drive it to zero, or very near zero, and then charge.

I knew a guy who bought a mountain bike, then he didn't want to ride it through any dirt (because it might shorten the life of the derailluer and chain/sprockets). I told him it was meant to ride through dirt, that's why it came with knobbies, but he was all about "protecting" his new baby.

So sad! I went on the ride without him.

 

[Outdoors]

I think it's a bit silly to worry about when it comes with a 150,000 mile/8 year powertrain warranty that includes early death of the battery.
Just charge it as high, and drain it as low, as your daily needs require. It goes 0-100% for a reason.

[QUOTE="HaulingAss, post: 245999,
Don't get me wrong, I take good care of my battery, right now it's only charged to 70% because that's all I need, even accounting for contingencies. If I need more range, I wouldn't hesitate to charge to 100%, because that's what it's there for.
[/QUOTE]

If one takes the time to read my points that's exactly what I said. Addition try to time departure around the end of charging if you need a high state of charge.

Interesting you follow up with that you take care of your battery. Thats all I am saying. Charge to 100 just don't leave it there. If you see the OP has never owned a Tesla before.

Everyone is also different. I will be through my warranty in 2.5 years for new Tesla's. 3 is out so will be my Y, and my Cybertruck. My S will have 400k as a 100d when its 8 year battery and motor warranty expires. I keep almost every car I have owned for a decade+. I have homes in 3 states.

The new warranty on Tesla's require more care if you drive high miles. 690 miles for me just to get to North Dakota.

So sorry it isn't silly as you make it out to be. It is a chunk of 100k driving around. I want it to last. Not going to pass it off in 3 years for the next joy ride. Tesla learned its lesson with grandiose battery warranties. Those days are gone.

 

[HaulingAss]

If one takes the time to read my points that's exactly what I said. Addition try to time departure around the end of charging if you need a high state of charge.

Interesting you follow up with that you take care of your battery. Thats all I am saying. Charge to 100 just don't leave it there. If you see the OP has never owned a Tesla before.

Everyone is also different. I will be through my warranty in 2.5 years for new Tesla's. 3 is out so will be my Y, and my Cybertruck. My S will have 400k as a 100d when its 8 year battery and motor warranty expires. I keep almost every car I have owned for a decade+. I have homes in 3 states.

The new warranty on Tesla's require more care if you drive high miles. 690 miles for me just to get to North Dakota.

So sorry it isn't silly as you make it out to be. It is a chunk of 100k driving around. I want it to last. Not going to pass it off in 3 years for the next joy ride. Tesla learned its lesson with grandiose battery warranties. Those days are gone.

Sorry, it sounded like you were suggesting that people keep it between 20-80% until we have more battery data. I'm just emphasizing that you shouldn't worry about going outside of 20-80% if 60% of the battery's capacity is not enough for that day. Just charge to whatever level you need, it's not going to ruin the battery unless you let it sit at high or low states of charge for extended periods.

 

[MajorVictory]

Reminds me of the saying about saving money, if you don’t fly first class your kids will. Why slave from 20-80% when most of us flip into a new vehicle every 3-5 years? Yeah I always think I’ll keep this one forever…. I had an 2018 M3 with the acceleration upgrade, charged to 90-100% and discharged below 20% most of the time driving like I stole it. Before it was submerged in a hurricane, with about 50k miles its range, it had degraded to 286 miles from 310 miles new.

My 2022 M3, also with 2180s, but from Panasonic has 353 miles of range with 16k miles still.

I believe the battery chemistry and production process has been upgraded. I suspect the 4680 batteries are also upgraded.

Go first class and range/charge stress less recommended as id bet those of us who are dropping over $100k on these deserve too. ?

 

[Zoomit]

it's not going to ruin the battery unless you let it sit at high or low states of charge for extended periods.

I'd like to see evidence that supports your concern about low SOC. There's plenty of evidence to the contrary, such as this:

 

[HaulingAss]

I'd like to see evidence that supports your concern about low SOC. There's plenty of evidence to the contrary, such as this:

The graphs you show are of storage with no load applied. An EV parked at a very low state of charge continues to draw power, even when it goes to sleep, which will eventually become inopperative after the low voltage battery runs flat and there is no way to charge it from the traction battery.

All the storage temperatures in those graphs are above room temperture. Do you have any for sub-zero temps? Where I live the battery would be unlikely to be at 25C except during a summer heatwave.

 

[Crissa]

Then I will keep min 20% for my next road trip to Tahoe where its cold.

You only need to do this for hops where there's risk you might end up waiting or have to limp to a secondary charging target.

There's no reason to, otherwise.

-Crissa

Aside from the vehicle shutting down, no, there's no risk to letting batteries freeze.

...However, they don't like to sit around empty. No one has handy charts of that because there's nothing to chart, just 'percent of cells failed when left discharged'.

And there's no damage from deep discharges because the BMS won't let you. It'll just say 'nope' and stop the discharge. It's that when this happens, you'd better get it charged today.

 

[Woodrick]

Compared to most models Tesla sells, the Cybertruck is a lower range vehicle.
If the OP is charging from 20-80% they are going to get 150 miles in good/average conditions, they will get less than 90 miles of range when towing, and could get under 100 if cold or driving on the highway.

It's essentially EXACTLY the SAME range as the Model 3 and the Model Y.

 

[Woodrick]

Got my first Tesla 2 weeks ago. The efficiency is not bad at all, 358Wh/m during the first 300miles(driving very slow tough). but its very inconvenient if I follow 20-80 rule. basically range is ony 150miles.
question is what will happen if I do 10-90? i know it might damage battery, but how much? any data ?

How much do you drive every day?
Are you charging at home?

For most, this isn't an issue, some even go lower than 80%. You plug it in and night, it charges and unless you drive 200 miles per day, it shouldn't be an issue.

Going above 80% will invoke the app to recommend staying at 80% to enhance the longevity of the battery. That was actually changed early last year and was previously 90%.

 

[Woodrick]

You can also throw a gas generator in the trunk and charge right on the spot

Honestly, I'm more old-school about batteries; I wouldn't risk deep discharge.

Which old-school battery technology are you comparing against? The rules change dramatically with battery chemistry and the rules of a Lead-Acid Car Battery have nothing to do with current rechargable batteries.

 

[Woodrick]

I'd like to see evidence that supports your concern about low SOC. There's plenty of evidence to the contrary, such as this:

You do realize that your graphs prove @HaulingAss's point.
If you leave the car at 100% for 10 months at 77F, you only lose 5%.

I'm not leaving my car plugged in continuously for 10 months. I'm going to use it.

But if I were to leave it plugged in for 10 month, I'd drop it to about 50% and know that I'd still lose 2.5%.

Moral of the story?

Use the car, don't worry about charging.

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