Charging battery to 90% vs 100%?

[Buckets0fun]

With the warranty, charge to 100 regularly. Hope for a replacement pack before you’re out of warranty.

If it was bad to go to 100, wouldn’t they limit it? Granted, it’s a new product from a new company and the data doesn’t support it either way. Simple not enough units at higher mileage or total units with controls of charging style/type.

Same like the study about DCFC the data shows it’s much less of an issue and more of a hype/hysteria thing.

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[Redline]

The thing is, for most driving you don't want 100%. The charging speed between 20-70% is so much faster.

I won't keep this past its warranty end, but I'm still going to take care of the battery.

 

[Supratachophobia]

I keep hearing that we shouldn't consistently be charging our batteries to full, instead cutting them off at roughly 90%. At Rivian are we to take this info consideration? Would love to hear from the engineers

I have it on good authority that the absolute best practice is keep the battery between 30-70% and charging to 100% isn't bad so long as you leave immediately.

Absolute worst practice is to charge to 100% in high heat, leaving it full AND hot.

 

[ads75]

With the warranty, charge to 100 regularly. Hope for a replacement pack before you’re out of warranty.

"Hope" for a warranty replacement sounds like great advice.

 

[Buckets0fun]

"Hope" for a warranty replacement sounds like great advice.

Oh they denied your warranty? ?‍?

By your logic, every other item should be a concern too.

Those tenneco units, the inverters, the everything… gawd the sadness that comes from pointing out a warranty is absurd. Meanwhile, 13k miles in a month on our R1S, mostly charging to 95-100% due to towing hard and heavy. Beating the snot outta it all the time. ??‍

 

[emoore]

Oh they denied your warranty? ?‍?

By your logic, every other item should be a concern too.

Those tenneco units, the inverters, the everything… gawd the sadness that comes from pointing out a warranty is absurd. Meanwhile, 13k miles in a month on our R1S, mostly charging to 95-100% due to towing hard and heavy. Beating the snot outta it all the time. ??‍

That’s your choice. Good luck with getting a new battery under warranty.

 

[Buckets0fun]

That’s your choice. Good luck with getting a new battery under warranty.

Jokes on you, my warranty has been void for almost a year.

Wife and I have put a little over 600k miles on EVs in the last 12yrs. I’m not stressing on degradation one bit. This bucket of an suv will fail in many other ways before I stress on the pack, but thanks for the luck! ???

 

[Buckets0fun]

"Hope" for a warranty replacement sounds like great advice.

Hope was used since no one knows degradation on these packs or what rivian’s trigger point is for replacement.

But hey… semantics.

I’m becoming more and more sure that their burn rate will take the company before most are out of warranty. ?

 

[emoore]

Hope was used since no one knows degradation on these packs or what rivian’s trigger point is for replacement.

But hey… semantics.

I’m becoming more and more sure that their burn rate will take the company before most are out of warranty. ?

Ummmm ok. Cool theory man.

 

[Buckets0fun]

Ummmm ok. Cool theory man.

Yawn.
Typical post is typical.
Try again duder.

 

[Bart57266]

“Consistently charging to 100% capacity promotes the growth of lithium metal tendrils known as dendrites that can cause a short circuit”

Source:
https://www.midtronics.com/blog/is-it-bad-to-charge-an-electric-vehicle-to-100/

 

[R.I.P.]

With the warranty, charge to 100 regularly. Hope for a replacement pack before you’re out of warranty.

If it was bad to go to 100, wouldn’t they limit it? Granted, it’s a new product from a new company and the data doesn’t support it either way. Simple not enough units at higher mileage or total units with controls of charging style/type.

Same like the study about DCFC the data shows it’s much less of an issue and more of a hype/hysteria thing.

A significantly degraded battery will not automatically trigger a warranty event (read the fine print) but will lower the value of the vehicle for resale, so this would seem a poor strategy.
?

 

[R1Thor]

I'm having trouble finding a credible source, which I'm blaming on 'bad Googling' at the moment.
If I recall correctly, Rivian's expectation is that the battery life warranty (8 years/175k miles) is rated FOR 100% state of charge. That is: nominal degradation to that point that it's still functioning as designed.

And regularly charging to 85% would theoretically increase the battery longevity beyond that.

And regularly charging to 70% would theoretically maximize the battery longevity.

One thing that they haven't been shy about is continuing to test, gather data, and ALT their battery technologies, so I anticipate future guidance based on real-world and lab-tested data.

End of the day, I suspect very few of us are doing anything that's going to significantly ruin our battery's life. Maybe when Motor Trend intentionally ran the battery to 0%--I wouldn't do that repeatedly (or at all if you can avoid it...).

 

[Redline]

Yeah, I'm pretty sure that's just a stupid idea all around.

 

[iansriv]

In my long ownership history of about four weeks, I've been charging to 80%. After reading this, I'm going to change that to 70%.

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