This standardized requirement is probably not true, since the car reports trip miles/kWhSagebrush wrote: LeafSpy is only as good as the data the LEAF supplies. I'm going retro on this whole business of evaluating battery health. A charge to full (either 80% or 100%) followed by a 50 mile drive will give a remaining SoC that can probably be relied on. The 50 mile drive will have to standardized .
If meters are noted at the outset, so that
miles/kWh is reset;
Initial SoC is noted;
initial odometer is noted.
And then a nice long drive of 50+ miles is undertaken,
kWh consumption is trip_miles divided by miles/kWh. An ~ +/- 1% error is introduced by having only one significant digit
SoC use is initial Soc less final SoC
Total battery capacity is kWh_consumption divided by SoC_use
I tried this just now by charging up to 79% SoC and then driving 65 miles
My problem is that LEAF reported 10% SoC remaining while LeafSpy reported 19% remaining
LEAF may be relying on GIDs to calculate remaining SoC, while LeafSpy may be (??) relying of Ah*V measurements
I'll try a couple more long trips followed by charges to look for changes and hopefully get the GID and SoC meters aligned.