Oils4AsphaultOnly said:
ironmanco said:
So, what's the going theory on the biggest killer of the 30kWh packs? Would the fact that I do 50/50 L2/L3 charging be the cause of an 83% SOH after 34k miles? I can tell you that I adhere to all the other battery upkeep guidelines - rarely charge to 100%, never store @ 100% and I'm in a pretty temperate climate - if not on the cooler side.
I'm actually headed down to the Nissan battery plant in TN at the beginning of December, so I'm hoping to get a chance to talk with some of the folks there.
There seems to be 2 separate theories. DaveinOlyWA's theory is that any 30kwh leaf built before Feb '16 is defective and will degrade regardless of temp/environment/care. These folks WILL get a warranty replacement, because of how fast their capacity is degrading.
There's a second one that the 30kwh chemistry just plain sucks as compared to the 24kwh leaf's.
I think they're not mutually exclusive, because of my experience this past year. I'm not seeing the degradation rate that others with earlier builds (yourself included) are seeing. But my battery is degrading fast enough that I might qualify for a warranty replacement (something that wasn't possible with my 2013 (turned in after 3 years and 45k miles with ~79% degradation).
Nobody seems to have evidence that it's as durable or more durable than the 24kwh, but due to DaveinOlyWA's theory, it'll be another year before we can say one way or the other.
I think both is correct. The early packs are suffering degradation MUCH faster than the 2011 packs were in Phoenix.
On the 2nd theory; there is still much higher levels of degradation visible even in packs just a few months old and so we can posit the tech sucks, the BMS sucks or the SW sucks. I think its a combination of all three.
I ran a 7 month long experiment to try to test "something" and although results seem clear to me the reality is the only thing that is for certain is what didn't happen (degradation) in one of our longest and warmest Summers since I have lived here (30+ years)
But the fact remains is that we still have
People in cool climates seeing heavy degradation
People in hot climates that are doing MUCH better than their neighbors
And this is present in all packs made since Spring 2016.
This should bring up the an obvious conclusion that yeah the batteries are a problem but there are things we can do to mitigate the issues.