The maintainer (not so much a dumb trickle charger) is a good idea. I see no need to charge the main battery unless you are expecting frigid weather. Leave the charge at about 40-50%.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.