michael said:
Once again, guys, you are relying on the car maker's estimate of battery condition.
I also monitor the energy used to recharge the car. Charging station logs it. So far, at least, that information is consistent with the LeafSpy estimates. Charged a few days ago from 35% SOC to full using 14.7kWh. 240V 30A L2 station. I compute about 92% of capacity.
Note that with LeafSpy full is actually 95% SOC, and stop is at about 2% SOC. The dash meter for state of charge reads 100% when LeafSpy reads 95%.
Now, if I was bored, I'd drive the car until turtle, park by a charging station and run the heat until shutdown. Then record the energy to recharge the car, and compare with the 25.4kWh needed to recharge the battery from empty to full when new. I'm not bored, yet.
michael said:
INL has tested 2013 Leafs, and typically their results show 15%-17% degradation at 15,000 miles and just over a year in service.
Which do you believe? Idaho National Laboratory? Or Nissan's on-board estimator?
My charging station's power meter.
There are a lot of things that can change how fast batteries degrade.
1) Temperature. Coastal WA is much cooler than Arizona. (3 to 4 times faster degradation in Arizona.)
2) Charging and discharging rates. DCQC all the time is fun, but heats up and otherwise degrades your battery.
3) Time spent at full charge. I use the timer to charge right before I leave in the morning. Did the tested cars?
(And more!)
How did the tests use and abuse the Leaf? Without knowing that, I can't compare.