johnlocke said:
Sorry, Dave but it probably does mean he's lost capacity. I just cleared 18,000 miles and I'm down to 322 GIDs, 70.51AH, SOH=89% Hx=84%. I can tell that I've lost some range just from daily driving. The loss isn't huge but it is noticeable. I drive the same route 5 days a week (55.1 mile round trip give or take a mile) and I used to get home with 45-49% battery left. Now the same trip leaves me with 39-43%. The number varies a little depending on A/C and heater usage but turning on climate control is only a 1 or 2 mile range penalty typically. If I'm lucky, battery degradation will slow over the winter but I expect to lose another 30 GIDs next summer. I'll be surprised if the battery lasts 4 years.
When I bought the car I really hoped that the battery was good for 100K and would still have 70-80% capacity but I bought it with the expectation that even with a 33% loss of capacity I could still use it as a daily commuter. That was why I had to wait for the 30KWH battery. The 24KWH battery was known to degrade and the 60K mile warranty didn't work for me with the milage I put on a car.
well, now that "I" have a 30 kwh pack, we shall see. I noticed the likelihood that a bit less percentage wise is available to the 30 kwh pack than the 24 kwh pack which likely means a shorter "float" time at the high end of the spectrum.
when I had the 24 kwh pack, my numbers were near 100% well into my 2nd year and we all know that would be impossible. time degradation would have seen to that. but then I (as have several others) would see a rapid drop to a level where it would stabilize again. guessing more instrumentation issues than anything.
But my new pack which is less than a week old dropped a few points almost immediately so we shall see where it goes. I know that even without fast charging I could boost my 24 kwh numbers by simply cycling it fully over 5+ days. I hope to see the same here so I won't be fast charging (at least not planning to for a least another 4-5 days or so...