flyingpertyhigh wrote: ↑
Mon May 27, 2019 9:06 pm
MrDRMorgan wrote: ↑
Fri May 24, 2019 12:35 pm
2014 spark EV no DCFC: @ 14,144 miles, 17.2 kWh; @ 18, 474 miles, 16.2 kWh. Degradation rate: 4330 miles per kWh. (TorquePro)
2015 spark EV with DCFC: @ 1414 miles, 18.8 kWh; @ 18,900 miles, 17.1kWh. Degradation rate: 10,286 miles per kWh. (calculated method)
2016 spark EV with DCFC: @ 10,284 miles, 16.6 kWh; @ 19,041 miles, 15.5 kWh. Degradation rate: 7,960 miles per kWh. (TorquePro)
Sorry - I'm not sure I understand your metric of degradation rate (x miles per kwh). Can you please explain what this means: "Degradation rate: x miles per kWh."
1. For my 2014 Spark EV - My data shows my HV battery degrades 1 kWh for every 4330 miles driven.
2. For my 2015 Spark EV - My data shows my HV battery degrades 1 kWh for every 10,286 miles driven.
3. For my 2016 Spark EV - My data shows my HV battery degrades 1 kWh for every 7960 miles driven.
For comparison purposes, assume 1 kWh = 5 miles of GOM range.
The data for my 2014 and 2016 Spark EVs, which I still own, was taken using TorquePro running on a Nexus 7 Android tablet and an OBDLink MX OBD2 adapter.
The data for my leased 2015 Spark EV, now returned to the dealer, was calculated using the data from the Energy Information screen in the car.
As an added note, for the last 1000 miles, neither my 2014 Spark EV nor my 2016 Spark EV has shown any evidence of further battery degradation. I need to gather much more data but I attribute this to limiting charging to 80 to 90% SoC. I need to continue to gather data for each car for 10k miles or more to see if this is true or not.