johnlocke wrote:WetEV wrote:johnlocke wrote:jury is still out on what the update does other than change the numbers that LeafSpy reports.
It seems pretty clear that the only thing the update does is change the numbers that LeafSpy reports, and that determine how many capacity bars to show.
The important question is: Is the new firmware more accurate than the old firmware?
Capacity estimation is a hard subject, there are some good papers on the difficulties, but they all seem to be behind paywalls. This is why most EV makers hide any capacity estimates from the user. Nissan is more open on this topic, and is due credit for being so.
If the firmware update changes the AH values then we should expect to see more GID's then before the update and an increase in range. People have reported the change in AH but so far I haven't seen any reports of higher GID's values or any increase in range. If the range doesn't change after the upgrade then Nissan is just jerking us around and trying to avoid warranty claims. If the car shows 12 bars but only gets 65-70 miles to a charge then the only thing Nissan fixed is their warranty issue not the battery. I can't make that comparison since I had the battery changed and the update done at the same time. We need owners who were down 2-3 bars and are now back up to 12 bars to report their GID's value at full charge from both before and after the update and if they have noticed any increase in overall range since the update.
We seem to be getting different stories here. The results of the update seems to fall into 2 broad categories.
1) User can't tell if range has changed mostly because their normal usage is well below the full charge range of the car both before and after the update
2) People who claim they have more range due to restored bars that likely boosted their confidence to drive farther.
Now there is also a smaller category of people who have simply lost trust in the car and won't challenge the range opting to gas it for trips longer than the shorter local distances.