JPWhite wrote:I noticed I had lost quite a bit of battery capacity in short order. I found it was Thursday (May 16th) and did an analysis of what was going on to cause the 0.3 reduction in Ah in a single day.
As one might predict based on what happened (and is happening) in Arizona, high battery temp is the culprit.
Battery Ah never recovered overnight after cooling.
Daily degradation appears to be .02 or .03 Ah. So once battery temp gets above 86 or so, the degradation accelerates by one order of magnitude !!
This is just one day, but it does look like single incidences can impact overall battery health.
Yep, a lot of research shows battery degradation begins at 87F. The App should stay yellow (up to 86F) until the BT reaches 87F.
You are, IMO, in danger of repeating the experience of those watching their gids last spring, who equated the decline in gid counts due to rising ambient temperatures with battery capacity
My indicated battery capacity has increased ~1% over the last few weeks (currently at 58.48 AHr and 88.26%) since my P 1 post below:
...My capacity reports at app-reported temps from ~59 f to ~86 F are extremely consistent, varying only ~0.20 % since the first capacity report I got at the SF BayLEAFs meeting over a month ago. Most recently:
That being said, I think they are consistently wrong,
in showing an ~12.5% loss of capacity, which has not shown up in my LEAF by either recharge or range capacity tests...
I don't think that my battery is healing itself and increasing in capacity. I just think the previously large error (likely a ~5% to ~10% overstatement) in capacity loss has decreased slightly.
My battery is ~20 f cooler today than it was in my post above, but the reported changes in indicated capacity do not seem to be reflecting a simple relationship with the current battery temperature.
Consistent with my p1 post, similar overnight temperature changes have not resulted in significant changes in the reported
AHr/capacity variations, but the current increases may have
been induced by my lower average battery temperatures over a longer period of time.