Thanks for the real data points! Unfortunately I don't think I ever figured out the original useable capacity when I 1st bought my car, also a 2014 w/o DCFC.MrDRMorgan wrote: ↑Mon Feb 11, 2019 9:51 amHere are some battery capacity data points for my 2014 Spark EV w/o DCFC:
17 Aug 15 - 1661 miles - 19.86 kwh from Energy Information screen data
15 Aug 16 - 6021 miles - 18.60 kWh from Energy Information screen data
28 Jun 17 - 10550 miles - 17.73 kWh from Energy Information screen data
20 Jun 18 - 14318 miles - 17.2 kWh as measured by TorquePro
7 Feb 19 - 17076 miles - 16.4 kWh as measured by TorquePro
Note: My current TorquePro data for both my 2014 and 2016 Spark EVs show a ~1 kWh drop in battery capacity when the battery temperature drops from around 30 deg. C to 14 deg. C (Jun 18 to Feb 19). How much of this drop is due to battery temperature and how much is due to degradation I will not know until Jun 19 when the battery temperature will be back up to 30 deg. C.
I just got Torque Pro and the custom PID's figured out and it claims I have 16.2kWh total capacity. Which obviously doesn't agree with the energy information screen.
Any way you figure it, I am somewhere around 20-25 % degradation after ~5.5 years, if you assume a linear degradation scale over the 8 years to 35%, I am definitely scraping along that bottom line. I'll take it to the dealer if it gets much worse...