surfingslovak said:
...what ultimately matters is actual measured range and any other data or assumptions should be backed up by range tests. These can vary (even with access to a dyno), but if conducted methodically, significant trends will emerge.
Yes, our instrumentation and execution are not ideal. However, if a number of owners reports 10% range reduction, what is more likely? That their vehicles have indeed less range or that they are all misreporting due to an instrument error or some mysterious BMS behavior?
And where do you suppose those "10% range reduction" figures coming from?
Do you really think they are all from
extremely well-conducted and accurate range tests, or much more likely, often a case of confirmation bias of erroneous reports from kWh use reports and gid counts?
As I have posted many times before, it was the results of a long series of range tests in controlled conditions that led me to believe, and post, last Summer, that my LEAFs kWh use reports were unreliable. But I also think it is impossible to determine exactly what the percentage error is, within a ~0%-10% range, since other uncontrolled variables in range tests conducted on a single LEAF over an extended period of time
may result in variations in distance driven approaching the same percentage range.
http://www.mynissanleaf.com/viewtopic.php?f=31&t=9064&start=20" onclick="window.open(this.href);return false;
The useful results of the Phoenix range test were to confirm that extreme variations in LEAF kWh use reports (between 3.7 m/kWh and 4.4 m/kWh) from near-identical driving conditions seems to confirm extreme inaccuracy of those reports, just as it showed gid report and capacity bar loss were also extremely inaccurate as indications of available battery capacity.
http://mynissanleaf.com/wiki/index.php?title=Battery_Capacity_Loss" onclick="window.open(this.href);return false;
And yet, forum participants continue to post the most unlikely (IMO) conclusions of their LEAFs efficiency and battery capacity, apparently based on "junk" data from these same discredited sources.
As an example, as posted recently:
tbleakne ...My LEAF has been getting 5.1 mi/kWh RT by driving freeways at 54-56 mph...
11% capacity loss
http://www.mynissanleaf.com/viewtopic.php?f=10&t=3281&start=430" onclick="window.open(this.href);return false;
Do we now believe a new LEAF has ~107 miles range at freeway speeds (21 kWh x 5.1 m/kWh) or do we conclude that it is far more likely that tbleakne's source for the 5.1 m/kWh is significantly overstating his LEAFs efficiency?
And as to tbleakne's 11% capacity loss? Did a gid count produce that figure, or is it from a more reliable and accurate source?
