Query, 8 June 2017: “Hi Henrik. A friend checked my Leaf’s battery health using LeafSpy (see attached screenshot). He was a little surprised that it was as low as 87% for a 2016 car with some 7000 k’s on the clock. Can you advise? Regards, Tony.”
Our reply: Yes indeed, 87% is a low score for battery health for a 2016 car. I attach the Benchmarking report for battery health vs Year of manufacture for May:
You can see this report on your second dashboard/sheet of reports. Just log in, and click on the right chevron ‘>’ at the top and it will take you to the ‘NZ Data’ dashboard. You can download the report via Excel or Pdf, or email it to yourself by clicking on the ‘Export’ buttons at the top. The report shows that so far yours is the lowest SoH for a 2016 vehicle in the Flip the Fleet panel.
There are several potential reasons for your low score: The car may have sat for a long time at full charge before you bought it, perhaps on a boat from UK, or sitting in the sales yard? This is almost the worst thing to do to a battery. A few other instances have been reported to Flip the Fleet of a rapid step down in battery State of Health (SoH) just after the car hits the road in New Zealand, but we need more data to see if this is a regular occurrence. I wonder if you could get a scan of the car from whoever sold it to you at the time it was registered in NZ so we can see if it rapidly dropped once used. It is also noticeable that you have a high proportion of Quick Charges – along the top of the scan you will see reference to 65 QCs (quick charges) and 51 L1/L2 (slow) charges. Most people are claiming that the number of quick charges makes little difference to battery degradation, but the fragmentary data in so far for Flip the Fleet is hinting that people may be underestimating this effect. It’s exactly the sort of question that we are trying to answer but it’s too early to make a call. Thirdly, your car may have come off the production line at the very start of 2016 and so have 12 month’s more wear compared to one manufactured in December.
You can see more discussion of battery SoH changes in Test Driver memo #7 posted earlier on these discussion pages.