If there is any "consensus" at all, it is that the Leaf should charge the 12 volt battery periodically, but that it may not, in some circumstances, do a great job of it. My 2018 has been measured by me at about 12.3 volts, which is too damned low.
Somewhere in the distant past, a big mistake was made: so-called "nominal" voltage was used to categorize the group of batteries now known as "12 volt." In fact, 12.0 volts is very nearly dead, and 12.3 volts is something like 45% charged. a "full" 12 volt battery will read just under 13.0 volts, and a "12 volt" AGM battery will read about 13.35 volts when fully charged.
Wow that's unfortunate for that owner. No Lithium Ion battery should EVER be stored or left unused at 100% SOC. Ideally keep them around 40%. I only charge my handheld power tool packs to 50% until I need to use them for the same reason & get years & years of service out them.Dala wrote: ↑Thu Apr 16, 2020 1:55 pmI followed a Leaf FB discussion, one local left his 40kWh 100% charged for 6 weeks, when he booted it up and drove it SOH dropped by over 2%. It might bounce back, but still it felt bad for him.
It seems to be more important for 40/62kWh Leafs to make sure SOC is in the middle since these batteries charge to 4.20V/cell.
The older 24/30kWh packs only go to 4.13V, so "100%" SOC on these are not as bad.