Does Ideal Km/Miles after standard mode charge actually mean anything

[Eberhard]

I backed ten feet out of the garage and stopped, and it showed 296 km.

Its silly, thats american rounding method in miles calculated back to km

[NigelM]

I caught it last night running its cooling system when I hadn't prodded it, so apparently it periodically stirs the pot in hot weather.

This happens all the time and is a positive feature. My office is alongside my garage and and I hear it running from time to time during the day.

[hcsharp]

I would call 1% insignificant. I'd call 8% (down to 173 from 188) significant. My understanding is that "battery lifetime" is generally used to mean the time it takes for a battery to degrade to 80% of its original capacity. I'd think that a decline of 8% in 2 years is a lot. It would suggest a "lifetime" of 5 years, compared to the seven years Tesla has recently suggested. OTOH, for many people even a 50% decline would still be adequate. For others, a 10% decline would render the car unable to perform as needed.

You're assuming that battery decline is linear with time. In fact it's not. Li-ion cells generally degrade much faster in the first year and then lose capacity much more slowly after that. An 8% decline in 2 years would be more consistent with 80% of original capacity in 8 to 10 years.

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If 4% per year is the norm, that's still over 10 years. (One of the reasons I think I'd have been less happy with a Leaf is that it has too little buffer for battery degradation.)

The Leaf has very poor thermal battery management compared to Tesla. You live in a climate that does not have too many extremes but if you did, Nissan would probably not sell you a Leaf because the battery would deteriorate very quickly. My wife has a 22 mi each way commute and I determined (using Nissan's data) that she would not make it to work and back after 2 years in our climate. We often see -25 deg F when we leave for work and if you charge or discharge a Li-ion cell at that temperature it severely shortens it's life. Tesla has mostly solved that problem.

[hcsharp]

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The other day my Ranger said my battery was in unusually good shape for a 1 year old. Down only 0.5. I imagine the Ideal Range number will eventually start going down as the battery ages.
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0.5 what units? One half of one percent? 0.5 km? 0.5 KWh?

[Doug_G]

I believe he was referring to CAC - Calculated Amp-hour Capacity.

[Dragon]

The other day my Ranger said my battery was in unusually good shape for a 1 year old.

You should tell us more about that. Where do you keep the car, which temperatures are there, how many range/performance charges, do you plug in every time you can, how many miles did you drive, are you an aggressive driver etc. etc. etc.?

[Doug_G]

You should tell us more about that. Where do you keep the car, which temperatures are there, how many range/performance charges, do you plug in every time you can, how many miles did you drive, are you an aggressive driver etc. etc. etc.?

Total mileage is around 14,000 km.

I'm in Ottawa, Canada, so temperatures range from almost +40C down to almost -40C. I kept the car in storage mode through the worst of the winter, about three months (although I did drive it on occasion).

I plug in daily. I keep the car in my garage, which is insulated but unheated. This has the side-effect of making it a bit hot during charging in the summer, so I've backed the charge current down to 40A. At other times of the year it's nice and cool in there.

I've never done a performance mode charge.

I've only done two trips long enough to require charging on the road. I've done a range mode charge a grand total of 5 times, although I only let it run to completion on two of those. All except once I drove the car within 15 minutes of the charge finishing.

Aggressive... well... I like to use the acceleration capabilities. I wore out my factory rears (AD07) in 7000 km.

[Dragon]

Many thanks. You seem to be similar in behavior as me. Hope my battery will keep up as well. The only thing I can't do is driving the car everytime the charging finishes. How do you manage that if you plug in daily?
My ideal range dropped from 302 km to 298 km and I have 2500 km on the odometer.

[Doug_G]

Many thanks. You seem to be similar in behavior as me. Hope my battery will keep up as well. The only thing I can't do is driving the car everytime the charging finishes. How do you manage that if you plug in daily?
My ideal range dropped from 302 km to 298 km and I have 2500 km on the odometer.

I was only referring to Range mode charging. If I'm charging for a trip, then I charge in Standard mode overnight. When I wake up in the morning I immediately go to the garage and set it to Range mode 70A and hit Start Now. That way it finishes the Range Mode charge around the time I want to leave.

[Eberhard]

after more then 35.000km i still get 304km when charging with 10A only. with 32A i got 293km only.