It has been two months since I got Leaf - and after a modest 1,000 miles on the odometere I propose that both Leaf & Carwings Miles / KWh are wrong.
We have has these assumptions in this forum for a while now
- Carwings m/kwh numbers are too optimistic and wrong (acknowledged by Leaf CS)
- Leaf has 24 kwh usable battery
- Leaf dashboard m/kwh is correct (somewhat unstated)
I've been collecting stats for almost 2 months now. We have also had many others posting their observations and stats. From all these we now have
- M/KWh reported by Leaf & by Carwings
- Miles traveled reported by Leaf & by Carwings
- KWh consumption at the wall reported by Blink/TED/kill-a-watt
The above three need to agree with each other and with the assumptions stated above. They don't.
- We already know that Carings m/kwh is too high. So, let us ignore that.
- We already know that Leaf reported Miles traveled and what Carwings reports are slightly different. Possibly due to GPS being less accurate. Let us ignore this difference.
- Leaf reports m/kwh in two ways. On the dash and on the central console. They are slightly different. The difference is explained by the difference in the mileage reported by Leaf dash & carwings. We can ignore this difference.
But we can't ignore the following.
of miles traveled divided by m/kwh reported when the battery is almost out (Turtle or near turtle), only give about 20 or 21 KWh.
- People are consistantly reporting above 4 m/kwh. If our assumption of 24 kwh battery is correct, we should be hearing a lot of above 100 miles of range achieved. But, we have almost never heard of anyone getting above 100 miles of range on one charge, though a lot of people have hit turtle and with better than 4 m/kwh efficiency reported by Leaf.
This can only mean one of 2 things.
i. Leaf battery's usable capacity is no more than 21 KWh OR
ii. M/KWh reported by Leaf is also bloated.
One interested aspect was brought up by bowthom
- Take electricity consumption reported by Carwings (motor + accessories)
- Look at the electricity consumption reported by Blink
- They are in fine agreement (within about 90%, as one would expect)
- Using this electricity consumption and the reported miles traveled, I seem to get more reasonable m/kwh, mainly below 4 as I expect in this cold weather and above 4 a couple of times. 10% to 20% less than what Leaf reports.
What this means is that M/KWh reported by Leaf is also bloated (ii above). There is still a possibililty that i above is correct i.e. Leaf battery's usable capacity is no more than 21 KWh.