How long do you expect your EV's battery to last?

[RobDickinson]

With 'free' power it's a decent option for longer term or industrial level storage sure

[Jag_luvver]

Chris-S said:

...
then having talked ourselves into a big budget, we drifted in to a new one when I spotted the C350e. We did look at used ones as they are much better value of course, but still not cheap, and decided that if we were spending a lot, we wanted what we wanted, not what was available IYSWIM.
...

I can appreciate that. My only reason for not getting bangers is if there's something specific that I would like, which is the wanted vs need/availability thing.

Max_Torque said:

Your ICE powered car is designed for a service life of 150k miles and 10 years

Your EV powered car is designed for a service life of 150k miles and 10 years


(i should know, i design the them!)


The difference? The EV can tell you how "knackered" its battery is! The ICE relies on the buyer having 1) some mechanical skill to assess the (likely) state of the powertrain and 2) often a lot of luck

An ICE car at 10yo and 150k miles is, effectively worthless.

I mistook the "10yr/150k miles" in your previous post for an 'or' rather than an 'and' (makes a difference!) - hence me wondering why ICE cars were only designed to last for 10 years: a 15 yr ICE car that's covered 50k miles will still have plenty of (mechanical) life left in its powertrain. I don't understand how a 15yr EV could be designed such that it would have a similar proportion of life left if it, given that some usage-independent battery degradation occurs and that knowledge of the latest batteries has had a comparatively short time to be developed.

Part of my skepticism is that I know nothing about how a battery could be designed to meet a particular usage profile - do you work in this area, and could you enlighten me? What aspect of a battery's design are used to maintain its capacity over a given lifetime?