To start with, I'm not asking this question to attack Teslas or EVs in general. I love my model 3 and wouldn't change it for anything (well, perhaps a new model Y...)
How long do EV main battery packs really last before they fail entirely? I'm talking about battery failure making the vehicle unusable without battery replacement rather than degrading a manageable amount of range (perhaps as much as 50% of range for a 15-20 year old car). I'm assuming here that battery packs won't be repairable though it's interesting to read about repairers taking on this challenge.
I read breezy predictions of 15-20 year battery pack lifetimes with much evidence AFAICT from various sources promoting EVs.
On the other hand I see quite a few posts on here describing battery pack failures in Tesla cars. I also read about severe battery degradation in the first generation of Nissan Leafs.
Do most battery packs last for 15-20 years but an unlucky minority of cars fail before that? Is it correlated to which version of battery technology was used (e.g. Model S 85 vs later generations of Model S battery technology). Is it mainly limited to batteries that have been treated poorly - depth of discharge, frequency of rapid charging, extremes of climate?
Is battery technology too young to have any certainty about this question? Are we in a parallel situation to the early years of ICE engines where the technology was not mature and unexpected failures were common?
Will manufacturers move to making EV batteries more repairable and making the detailed health of the battery more transparent?
Many Tesla model S cars are out of battery warranty now (here in the UK they'll start coming out of warranty next year, I think). The battery replacement costs are huge compared with the value of an 8 year old car. I can see that people who want to own classic luxury cars like the Model S might be willing to take their chances with this.
Is this situation sustainable for mass market cars? In a mature EV market will the used value of a cheaper EV drop to a very small fraction of its value once out of battery warranty perhaps not much more than the salvage value of the failed battery for energy storage applications and just be scrapped as soon as the battery randomly fails one day?
Perhaps we'll go back to battery leasing schemes like Renault to warranty the battery remains usable underwritten by battery's salvage value.
As a contrast my ICE Mazda mx5 was still going strong when I sold it at 12 years old and is still running today at 17 years of age judging by the public MOT test results (the government roadworthiness inspection system here in the UK). Many other cars are running at much greater ages without requiring engine replacements.
How long do EV main battery packs really last before they fail entirely? I'm talking about battery failure making the vehicle unusable without battery replacement rather than degrading a manageable amount of range (perhaps as much as 50% of range for a 15-20 year old car). I'm assuming here that battery packs won't be repairable though it's interesting to read about repairers taking on this challenge.
I read breezy predictions of 15-20 year battery pack lifetimes with much evidence AFAICT from various sources promoting EVs.
On the other hand I see quite a few posts on here describing battery pack failures in Tesla cars. I also read about severe battery degradation in the first generation of Nissan Leafs.
Do most battery packs last for 15-20 years but an unlucky minority of cars fail before that? Is it correlated to which version of battery technology was used (e.g. Model S 85 vs later generations of Model S battery technology). Is it mainly limited to batteries that have been treated poorly - depth of discharge, frequency of rapid charging, extremes of climate?
Is battery technology too young to have any certainty about this question? Are we in a parallel situation to the early years of ICE engines where the technology was not mature and unexpected failures were common?
Will manufacturers move to making EV batteries more repairable and making the detailed health of the battery more transparent?
Many Tesla model S cars are out of battery warranty now (here in the UK they'll start coming out of warranty next year, I think). The battery replacement costs are huge compared with the value of an 8 year old car. I can see that people who want to own classic luxury cars like the Model S might be willing to take their chances with this.
Is this situation sustainable for mass market cars? In a mature EV market will the used value of a cheaper EV drop to a very small fraction of its value once out of battery warranty perhaps not much more than the salvage value of the failed battery for energy storage applications and just be scrapped as soon as the battery randomly fails one day?
Perhaps we'll go back to battery leasing schemes like Renault to warranty the battery remains usable underwritten by battery's salvage value.
As a contrast my ICE Mazda mx5 was still going strong when I sold it at 12 years old and is still running today at 17 years of age judging by the public MOT test results (the government roadworthiness inspection system here in the UK). Many other cars are running at much greater ages without requiring engine replacements.