Yeah, I don't think anyone here is clear why Tesla can get away with UI to let you control charge end SoC along w/GM and now HyunKia.
Maybe Nissan got bit because they called 80% "long life mode" and had references in '11 to '13 manuals with stuff like this?
• Avoid sustained high battery state of charge (caused, for example, by frequently charging to 100% state of charge and/or leaving the battery
above 80% state of charge for long periods of time).
• Allow the battery charge to be below at least 80% before charging.
Above is from page EV-24 of the '13 Leaf manual.
And, maybe it's related to this that was written before Leaf shipped?
https://web.archive.org/web/20100112044 ... tes_page_3
that vehicle is tested in any driver-selectable mode, such as a transmission sport mode, that would worsen emissions. But for fuel-economy purposes, many things are up for discussion; it’s the automaker’s task to convince the EPA how the cars are likely to be driven in consumers’ hands.
The EPA’s Wehrly describes a hypothetical, but typical, discussion where an automaker wants to get around activating a particular feature that degrades fuel economy during the testing. Luxury automaker: “We have this feature, but no one uses it.” EPA: “Then why do you have it?” Automaker: “Because Mercedes has it. If we don’t have it, it looks bad.”