HerdingElectrons said:
danrjones said:
Does anyone have a leafpy reading for SOC at zero usable range?
I did from some testing I did awhile back. Let me see about getting that uploaded to the internets. And I also showed about 9.2% via LeafSpy with dashes where the remaining mileage would normally be on the dash
Thanks! I guess this also means one must define what "empty" means. Are the dashes when you hit turtle mode? My idea was to assume Nissan is holding back 4 of the 40 kWhs, therefore, when you hit "empty" you can take that as the bottom for your calculation. But then everyone may treat empty as slightly different - 0 miles on the GOM. Or turtle mode. Or when the car refuses to move. I'd argue empty is when you hit turtle since turtle isn't a super useful car but YMMV. But It should really be empty when Nissan won't let you use the hidden portion of the battery.
One can do some sensitivity analysis on my previous calculation. I have two pieces of data for empty - rounding them we can say 10% SOC and 9%. I'll also toss in 8% just to see what that would do. (Reminder my data was at 5% usable and that equated to 10% on Leafspy so I'm using that and adjusting)
(miles driven/Eff = kWh used -> kWh used/battery % used = usable batt capacity -> usable batt cap / original usable = remaining capacity)
(Empty is 10% SoC) 126/4.1 = 30.7 kWh -> 30.7/0.95 = 32.3 kWh -> 32.3/36 = 89.7%
(Empty is 9% SOC) 126/4.1 = 30.7 kWh -> 30.7/0.94 = 32.7 kWh -> 32.7/36 = 90.8%
(Empty is 8% SOC) 126/4.1 = 30.7 kWh -> 30.7/0.93 = 33.0 kWh -> 33.0/36 = 91.7%
Further I'm not confident on my 4.1 miles per kWh number, so we can re-run the analysis using some variations with that as well.
(Efficiency 4.1) 126/4.1 = 30.7 kWh -> 30.7/0.95 = 32.3 kWh -> 32.3/36 = 89.7%
(Efficiency 4.4) 126/4.4 = 28.6 kWh -> 28.6/0.95 = 30.1 kWh -> 30.1/36 = 83.7%
(Efficiency 3.8) 126/3.8 = 33.2 kWh -> 33.2/0.95 = 34.9 kWh -> 34.9/36 = 96.9%
Seeing this data I'd argue that the bottom SOC makes a difference but having the correct efficiency into my calculation makes a much larger difference, and I'm not confident on that 4.1 number. I'll need to repeat the experiment but reset my trip meter and write down the readings from MyLeaf app for each trip in the experiment.