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Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Posted: Tue Aug 07, 2012 1:44 pm
by SierraQ
opossum wrote:
edatoakrun wrote:The only way to I can see to reconcile your report of kWh use, 25%-30% below that usually seen on new LEAFs, and the "85% capacity remaining" report you state came from Nissan, is that your charge level was limited to a significantly lower percentage of total battery capacity, presumably by the BMS.
Agreed. I've seen one or two other possible explanations in the last few posts also. It's okay. Maybe Nissan will get a chance to explain to a lawyer why they market it as a 24 kWhr battery pack, if they permanently or seasonally limit people to perhaps 75% of it... but only after a year of ownership. Now wouldn't *that* be an interesting discovery process! :twisted:
Not necessarily. When is the last time you saw 500GB of usable space on your "500GB" hard drive or 12mb useful throughput from your "12mb" broadband line? I think there is precedent for not including necessary overhead in figures like this. However, a more challenging problem for them would be explaining the "100 mile" range figure which assumes no overhead but is like saying your ICE gets 75 MPG... so long as you drive it at 30 MPH with a healthy tailwind and never use the brake. Unreasonable.

A seasonal limitation, should it exist, would also be harder to explain away since they never mentioned it with respect to heat (they did for cold). Anyway, I think 85% is probably the entire pack but it would be very bad form for them to try to claim that this is okay.

Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Posted: Tue Aug 07, 2012 1:51 pm
by edatoakrun
Gonewild wrote:OK your bars are back but can you drive as far as you did a few month ago?

My guess NO they just reset the counter
If you were really paranoid, you might suspect TickTock's special treatment (being invited to have his car checked even before he filed a complaint, IIRC?) might have been followed up with a replacement battery, just to disrupt his ongoing surveillance of actual/available battery capacity...*

*please note the Ellipsis (...)

Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Posted: Tue Aug 07, 2012 2:06 pm
by LEAFfan
Ed, if that were the case, then those drivers that babied their cars here would still have 12 bars instead of 10 or 11. It's definitely not the cause of major degradation.

Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Posted: Tue Aug 07, 2012 2:19 pm
by TonyWilliams
While everybody is pontificating about temperature adjustments to available capacity, please address why I had 15-18% loss of RANGE / AUTONOMY in 75F temperatures? And a similar numbers of performance reduction from other LEAFs in other "hospitable" climates?

Is the rational that it would just get worse with temperature, and then magically improve as the temperature returns to hospitable? If so, then we can just take one of the many affected Arizona LEAFs, and air condition it overnight, and then wake up early with a full, cooler 100% charge in 75F early morning in Phoenix, and voila, range and capacity bars restored.

Good luck, but we don't have to guess. Another variable that is very easy to test for.

Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Posted: Tue Aug 07, 2012 2:25 pm
by OrientExpress
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Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Posted: Tue Aug 07, 2012 2:27 pm
by TomT
Well, add me to the list. I lost a capacity tick this morning... 22,000 miles, 2 QCs, normally charge to 80 percent, 17 months since delivery.

Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Posted: Tue Aug 07, 2012 2:29 pm
by TickTock
OrientExpress wrote:What if this whole thing is just a SW bug that is not accurately reporting the capacity of the battery?
Would be nice, but not a chance. We have confirmed the loss through many means: power from the wall, driving range, gids, bars, carwings, etc. All have consistent results.

Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Posted: Tue Aug 07, 2012 2:32 pm
by EdmondLeaf
TomT wrote:Well, add me to the list. I lost a capacity tick this morning... 22,000 miles, 2 QCs, normally charge to 80 percent, 17 months since delivery.
Sorry to hear that from people that are considered as not extremely hot climate inhabitants

Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Posted: Tue Aug 07, 2012 2:36 pm
by DesertDenizen
EdmondLeaf wrote:
TomT wrote:Well, add me to the list. I lost a capacity tick this morning... 22,000 miles, 2 QCs, normally charge to 80 percent, 17 months since delivery.
Sorry to hear that from people that are considered as not extremely hot

How do you know Tom is not hot? :lol:

Re: Early Capacity Losses-Was(Lost a bar...down to 11)

Posted: Tue Aug 07, 2012 2:37 pm
by camasleaf
SierraQ wrote:... A seasonal limitation, should it exist, would also be harder to explain away since they never mentioned it with respect to heat (they did for cold) ....
I believe Nissan owner manual says somewhere that the distance travel in one charge depends on many factors. Did they only listed low battery temperature in those factors? Or they just said temperature? I do not have the owners manual handy.