Long Term Leaf Storage

[LeftieBiker]

But with EV it boils down to having two chargers attached to the 12v at the same time. One being the trickle, and the other being the traction battery. As the charging function from the traction battery kicks in, it may not properly detect the voltage of the accessory battery.

If the accessory battery is kept fully charged by the maintainer (NOT a trickle charger, which is another, more primitive device) then the full battery the charging system detects will, in fact, be a full battery. That doesn't look like a problem to me.