TickTock,
I have seen many references on multiple threads that seem to be referencing your statement:
...I drive almost 2X that which explains why I am sitting well below the Phoenix predicted curve at [email protected]....
As evidence that the "real" Phoenix/ hot climate capacity loss in the future cannot be expected to match that on the graph from Nissan you reconstructed (at the link below your comment I pasted below).
It seems to me (unless Nissan stated otherwise) that a significant factor explaining your car currently being "under the curve" is the seasonality of your ~16 month period of use.
If temperature exposure is the cause of "capacity loss", whether due entirely to battery degradation or with BMS operation as a contributing factor, then you would of course expect the curve for any individual LEAF
not to be a straight line, such as shown on the graph, but showing the seasonal effects of high temperature exposure, fluctuating markedly above and below the curve, which begins at-date of delivery?
So it appears to me that the curve Nissan presented to you, most likely was that produced by the
composite of all actual LEAF deliveries to those markets, over all months of the year, and at all seasonal ambient temperatures.
Your car, however, with a May 31 2011 delivery date, has experienced nearly two years worth of high heat exposure over just 16 months.
And your LEAFs individual capacity loss curve,
looking like something between the straight line and annual descending stairs, might be expected to show it's maximum deviation below the straight-line average in the Chart, right about now, would it not?
Unless I'm Missing something, eight months from now,
if your LEAF does experience a much lower rate of capacity loss during the lower ambient temperatures, your LEAF might actually be much closer to (though not above, unless BMS effects come into play) the generic curve, even with your relatively high miles driven.
TickTock said:
Here's my receation of the graph I think is most pertinent to all owners/buyers to decide individual course of action. The actual dots are numbers I wrote down, I filled in the gaps from memory based on the shape. Indeed there is a precipitous drop in capacity in the first 6 months and then the degradation slows and continues to slow over time. The key thing to notice is the 80%@5years we've all been using to base our decisions is actually only the median value and not what a Phoenician can use as an "expected value" These curves are based on average mileage per area: 7500 for Phoenix (I don't recall what the Boston number was except that it was higher then Phoenix).
I drive almost 2X that which explains why I am sitting well below the Phoenix predicted curve at [email protected]. This data is not LA4, but rather a 32.2A discharge rate to better match 55mph discharge rate.
The axis on the right was not on the graph I was presented. I added that based on the 84.7%SOH Nissan measured and the 74 mile range Tony measured shortly after so I can get a realistic idea how much range I will have at year 5. As you can see it will be well below the 65miles per day I require. If you stick within the 7500 miles per year (~30 miles/day), you should get 65 miles after 5 years and still be quite happy since you only need 30.
http://www.mynissanleaf.com/viewtopic.php?f=30&t=8802&p=230575#p230575" onclick="window.open(this.href);return false;
PS 8:30 AM:
I consider the fact that my LEAF has also gone through two not-as-hot-as-Phoenix North Valley/foothill Summers (last near-100 F degree day of the year is expected tomorrow) with so little range/capacity loss, very good news.
http://www.mynissanleaf.com/viewtopic.php?f=31&t=9064&start=30" onclick="window.open(this.href);return false;