jbuntz wrote:Currently my stats are 50.44 Ah 63.46 SOH 60.59 Hx 21622 Odo 230Gid 4 bars down. Appmt for Tuesday to get tested for replacement.
I did a test yesterday drove 77 miles to 6 GIDs. 70 miles were at 70 mph and the rest at less than 30. LeafSpy reported 17660 Wh used .5kWh remains. I then charged to 100%. EVSE total input was 25 kWh. Input was at 6737 Watts. LeafSpy displays 5874 to battery 200 Aux.
At 90% charger efficiency that would add about 22.5 kWh. LeafSpy at 100% charge reports 17.8 kWh Remain.
There will be some loss between battery input and charge but this seems excessive. Maybe this is the bms reprogramming fix?
I also noticed that the car displayed 3.5 mi/kWh avg where LeafSpy showed 4.4 over the 77 mile trip. Or 22.65 vs 17.5 kWh used.
So what do you think the true capacity is and what are they going to tell me Tuesday?
A trip miles/kWh would have also been informative.
There is quite a bit of variation in charging efficiency so don't read a lot into one test. I think the *average* charging loss at L2 is 13% so if full battery charging over multiple tests averaged out to 25 kWh from the meter then battery capacity = 21.75 which would be about 21.75/28 = 77.6% of new.
I expect Nissan to apply the patch and tell you to return when you hit 8 bars capacity. Presuming the patch causes a reset, I'd expect the battery to settle down to 11 bars, but probably 10 bars by end of summer.
All told, this is one (for now) fuzzy data point that says that Nissan is telling a part truth: the capacity bars reported are indeed lower than actual, but the degradation is still bad.