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EV batteries should last much longer than 10 years. Ideally, they should last the lifetime of the vehicle. Most manufacturers, including Tesla, provide an 8 ye

EV batteries should last much longer than 10 years. Ideally, they should last the lifetime of the vehicle. Most manufacturers, including Tesla, provide an 8 year warranty on battery and drivetrain.

sokoloff 7y ago
I believe the 8 year warranty is driven by the federal requirement to warrant emissions systems for 8 years/80K miles. I think that all EV manufacturers are providing at least that level of warranty for battery and electric motor and think that it's likely linked to the federal emissions control warranty requirement. There's a school of thought that past the warranty period, the traction battery is likely going to last the lifetime of the vehicle, by definition (in that when the battery dies, there is likely no economically sound way to replace with a new battery, so the choices are fit a junkyard battery or junk the car).
- VBprogrammer 7y ago
  > when the battery dies, there is likely no economically sound way to replace with a new battery While I can imagine that being a very likely scenario; I can also imagine a future where someone down at the local shopping mall will change the battery out for a Chinese compatible unit while you do your shopping. In the same way the currently do for phone batteries, screens etc. It would be great for standard agencies / governments to get out in front of the electric car industry and demand standardised form factors for batteries and charging infrastructure. At the moment it would probably limit innovation too much though.
  - Reason077 7y ago
    Exactly. In a decade or two, I can imagine thriving third-party shops specialising in battery upgrades for all popular electric vehicles. They don't really exist today, because contrary to what anti-EV FUDsters believe, there just aren't many EVs with worn out batteries yet. Perhaps there are a few, but the number of EVs written off in accidents (and thus making donor batteries available) is much, much greater.
    - bluGill 7y ago
      I wouldn't call them thriving. I agree they will exist, but unless the price of batteries come down a lot they won't be cost effective. By the time a car needs a new battery it will already have a lot of other wear and not be worth much. Spending $5000 on a battery for a car worth $3000 after the fix isn't a good deal for most people. (if you keep the car for 10 more years it is, which is why the industry will exist) Of course both dollar values are made up, they are realistic with today's prices but subject to change.
clouddrover 7y ago
Tesla's warranty is 8 years at 70% original capacity for the Model 3. For the X and S they don't warrant the capacity at all: https://www.tesla.com/support/vehicle-warranty https://www.tesla.com/support/vehicle-warranty You'll be getting less range over time as the battery degrades. Eventually you'll have to replace the battery to get the range back.
- Reason077 7y ago
  They don't explicitly state a warranted capacity for the Model S/X, but I've never heard of an S/X battery with more than ~20% degradation that wasn't considered faulty by Tesla. Whatever Tesla's reason is for not stating a specific capacity, it's not to screw over S/X owners, and I'm sure that 30% capacity loss within 8 years would be considered a fault. We don't yet know how they stand up over >8 years of service, of course, but there are many examples of very high milage Tesla vehicles (> 200,000 miles) that are still on their original battery and show only modest degradation.
  - clouddrover 7y ago
    > I'm sure that 30% capacity loss within 8 years would be considered a fault. Why are you sure? If it's not under warranty, it's not under warranty. If it's considered a fault then it would be warranted.

EV batteries should last much longer than 10 years. Ideally, they should last the lifetime of the vehicle. Most manufacturers, including Tesla, provide an 8 year warranty on battery and drivetrain.

sokoloff 7y ago

I believe the 8 year warranty is driven by the federal requirement to warrant emissions systems for 8 years/80K miles. I think that all EV manufacturers are providing at least that level of warranty for battery and electric motor and think that it's likely linked to the federal emissions control warranty requirement. There's a school of thought that past the warranty period, the traction battery is likely going to last the lifetime of the vehicle, by definition (in that when the battery dies, there is likely no economically sound way to replace with a new battery, so the choices are fit a junkyard battery or junk the car).

VBprogrammer 7y ago
> when the battery dies, there is likely no economically sound way to replace with a new battery While I can imagine that being a very likely scenario; I can also imagine a future where someone down at the local shopping mall will change the battery out for a Chinese compatible unit while you do your shopping. In the same way the currently do for phone batteries, screens etc. It would be great for standard agencies / governments to get out in front of the electric car industry and demand standardised form factors for batteries and charging infrastructure. At the moment it would probably limit innovation too much though.
- Reason077 7y ago
  Exactly. In a decade or two, I can imagine thriving third-party shops specialising in battery upgrades for all popular electric vehicles. They don't really exist today, because contrary to what anti-EV FUDsters believe, there just aren't many EVs with worn out batteries yet. Perhaps there are a few, but the number of EVs written off in accidents (and thus making donor batteries available) is much, much greater.
  - bluGill 7y ago
    I wouldn't call them thriving. I agree they will exist, but unless the price of batteries come down a lot they won't be cost effective. By the time a car needs a new battery it will already have a lot of other wear and not be worth much. Spending $5000 on a battery for a car worth $3000 after the fix isn't a good deal for most people. (if you keep the car for 10 more years it is, which is why the industry will exist) Of course both dollar values are made up, they are realistic with today's prices but subject to change.

clouddrover 7y ago

Tesla's warranty is 8 years at 70% original capacity for the Model 3. For the X and S they don't warrant the capacity at all: https://www.tesla.com/support/vehicle-warranty https://www.tesla.com/support/vehicle-warranty You'll be getting less range over time as the battery degrades. Eventually you'll have to replace the battery to get the range back.

Reason077 7y ago
They don't explicitly state a warranted capacity for the Model S/X, but I've never heard of an S/X battery with more than ~20% degradation that wasn't considered faulty by Tesla. Whatever Tesla's reason is for not stating a specific capacity, it's not to screw over S/X owners, and I'm sure that 30% capacity loss within 8 years would be considered a fault. We don't yet know how they stand up over >8 years of service, of course, but there are many examples of very high milage Tesla vehicles (> 200,000 miles) that are still on their original battery and show only modest degradation.
- clouddrover 7y ago
  > I'm sure that 30% capacity loss within 8 years would be considered a fault. Why are you sure? If it's not under warranty, it's not under warranty. If it's considered a fault then it would be warranted.