New Study: How Long Do EV Batteries Last?

[DanoiZ]

Saw this study mentioned on TFLEV and thought I would share. Answers a lot of the bad misinformation out there about EV battery failures and the general lies people push on social media and comment boards.

https://www.recurrentauto.com/research/how-long-do-ev-batteries-last

Here's a highlight. Enjoy!

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[Maquis]

A 1.5% battery failure rate doesn’t sound great. But without some details, it’s hard to really say.

 

[TheSteelRider]

A 1.5% battery failure rate doesn’t sound great. But without some details, it’s hard to really say.

Yeah that was my thoughts. 1.5% of 15,000 cars is 225. This seems like a very outsized failure rate to me, not "quite rare".

 

[Adventureboy]

Not enough information in the report to know what this means. Does battery replacement mean full replacement or module replacement? Ford, Polestar, VW, Volvo, etc. do not appear to be represented in the calculation that represents the 1.5% so it isn't clear what this means.

This was an interesting graph. Range estimates increased on the Select AWD and pretty flat on Premium RWD. Not sure Dashboard range estimates are a realistic metric to graph by and they leave out quite a few cars by only using data for two variants - Select AWD and Premium RWD Extended.

 

[Blue highway]

Really interesting... I'd like to see these graphed as state of health % because of the effect of temperature on the GOM number, but something is better than nothing.

So many questions -
I'd also like to know why early model S cars have big degradation for the big battery but not so much for the smaller ones. Are these the ones that are simply software locked or is this the real capacity... did something change in chemistry?

what is the sample size for each graph

Is there an updated version of the data... the data here is at least a year old.

 

[TheSteelRider]

Not enough information in the report to know what this means. Does battery replacement mean full replacement or module replacement? Ford, Polestar, VW, Volvo, etc. do not appear to be represented in the calculation that represents the 1.5% so it isn't clear what this means.

This was an interesting graph. Range estimates increased on the Select AWD and pretty flat on Premium RWD. Not sure Dashboard range estimates are a realistic metric to graph by and they leave out quite a few cars by only using data for two variants - Select AWD and Premium RWD Extended.

Agree, that seems like not a useful or meaningful graph. Clearly range will not increase over time, and graphing the GOM is a garbage-in/garbage-out proposition. Now it makes everything on their website suspect if they can't graph what is the main crux of their argument appropriately. Are we missing something profound here that we aren't understanding about their data/graph?

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