Willie, Not dynamically, just a one-time upgrade (dealer visit required). Many Leaf owners who lost the 4th bar and thought they qualified for the warranty battery replacement were miffed to see the dealer really enforcing the Nissan requirement that the warranty will only be honored after the mandatory re-calibration of the 12 battery bar gauge. Most owners found out that after re-calibration their earlier 4 bar loser no longer showed 4 bars lost so they no longer qualified unless they would again see 4 bars lost on the re-calibrated gauge. The first bar does not disappear until 15% is lost and each subsequent bar should stand for 6.25% so in theory you need a battery degraded to just over 66% of nominal capacity to qualify if the gauge will indeed drop to 4 bars right at that point. But reports I have seen of Ah capacity degradation suggest that the loss of the 4th bar happens later. I found it significant that Leafs can lose more than 40% capacity in about 50k mi while some Tesla drops only 6% in 200k mi.
Of course this is only one sample with a specific usage pattern, but I highly doubt an expansion of the samples will give different results, we'll see. Cor van de Water Chief Scientist Proxim Wireless office +1 408 383 7626 Skype: cor_van_de_water XoIP +31 87 784 1130 private: cvandewater.info http://www.proxim.com This email message (including any attachments) contains confidential and proprietary information of Proxim Wireless Corporation. If you received this message in error, please delete it and notify the sender. Any unauthorized use, disclosure, distribution, or copying of any part of this message is prohibited. -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Willie2 via EV Sent: Tuesday, October 04, 2016 11:18 AM To: Electric Vehicle Discussion List Subject: Re: [EVDL] To fully charge or not to fully charge that is the question On 10/04/2016 12:29 PM, Cor van de Water via EV wrote: > on the battery as the Leaf *does* degrade its battery by 40% to approx > 60% capacity in approx 50k mi in warmer climates (that is the point > where Nissan gives a warranty battery replacement, even though they > promised 70% but re-calibated the battery to lose the 4th bar around 60% > capacity and triggering the warranty if it occurs within the warranty > limits for time and mileage.) When I first got my Leaf, I was astonished at how crappy the instrumentation is/was. Coming from the conversion world, I expected to see, or find out, how much energy went into the battery and how much came out. Instead, I had these twelve "bars". Unacceptable granularity. Later, I found the "bars" were not even of equal value. After some pondering, I came to the conclusion that Nissan did things in that way to hide information from their customers. What other explanation could there be? Even more astonishing is how Leaf owners accept the situation and speak of almost meaningless "bars". I'm not surprised to learn that Nissan dynamically recalibrates "bars" to manage their warranty threshold. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)