Stoaty said:
surfingslovak said:
However, I would not go as far as saying that the observed "rapid degradation" is erroneous. Even 15%, a number that reportedly came from Nissan, after one year is very significant. It's nearly unheard of in comparable lithium-ion EVs, at least in my experience. This figure would be OK as an outlier, but not if a significant number of owners experienced it.
Yes, Azdre/opossum were told that the
best Leaf that Nissan tested at Casa Grande had 14% capacity loss. That means every single Leaf that was tested (presumably those with 2-3 capacity bar loss) had capacity loss far greater than Nissan represented as the expected loss when they were marketing the Leaf. We know of 55 cases of loss of one capacity bar. I would guess the actual number to be at least 3 times that many.
Yes, a sampling of 6 (or 11?) LEAFs were selected
because their displays of 2-3 lost capacity bars indicated atypically high capacity loss. Unfortunately, only a few of those Casa Grande owners have reported both what Nissan told them about actual capacity loss, all reporting in the 14%-16% range, for their LEAFs and others, IIRC.
So apparently these reports indicate
all of those cars,
according to Nissan, were displaying losses of capacity bars, given the often quoted values those bars are believed to represent, larger than the reductions in actual battery capacity.
I don't Think it's out of the question that Nissan told Casa Grande LEAFs owners accurate reports of capacity loss. TickTock's long-term documentation of his LEAFs battery capacity, which, IMO, is be the most comprehensive, tends to indicate Nissan gave him an accurate battery assessment, from Casa Grande . Why his car got bars back, and no others have reported the same, is the unanswered question.
IMO, only when Nissan is forthcoming with further explanation, and/or LEAF owners better document actual capacity, by well-conducted range tests
with all variables controlled, over one or more years of seasonal temperature conditions, will we understand what bar losses actually indicate about capacity loss, temporary or permanent.