I'd like to do some more analysis on the parameter Greg discovered in the Group1 data called "perhaps health" by Greg and Hlth in the leafApp. While it does seem to be a good indicator, I don't think it is really what we are looking for based on my observations.
Below is some information I've previously reported along with additional data from 5b3
2 which I believe is the true SOH as defined by Nissan:
- Just before update:
9 capacity bars
62.4% Hlth
68% SOH
45.59 Ah
Just after the update (measured in the parking lot):
12 capacity bars
100.0% Hlth
100% SOH
65.60 Ah
Upon arriving home:
12 capacity bars
50.9% Hlth
100% SOH
65.60 Ah
The next day:
12 cap bars
50.9% Hlth
72% SOH
46.92 Ah
15 days later:
12 cap bars
51.7% Hlth
73% SOH
48.3 Ah
Today:
12 capacity bars
51.7% Hlth
72% SOH
47.42Ah
LEAFfan's 2013:
12 capacity bars
90.6% Hlth
90% SOH
59.37Ah
Based on this, it appears:
- 1) SOH is pretty nearly Ah divided by 65.6. Probably exactly that post-sw-update (good news if you are not able to monitor canbus)
2) Since Hlth was able to update mid drive home but SOH (5b3:d2) and Ah didn't get updated until after a full charge, it appears hlth is not a measure capacity (maybe resistance or something else that also degrades with age).