This will likely end in tears as they say, but here is one BIG tip: Do NOT use the Accessory mode to run accessories. If you are in the car, always use Ready mode (yellow-green car icon lit, car ready to drive) to keep the DC-DC converter running the accessories. You will still likely have to use a battery maintainer, and I strongly suggest you install a larger deep cycle or at least "marine" type battery. No make that definitely a deep cycle battery, preferably AGM type.
2013 "Brilliant Silver" SV with Premium and no QC, a 2009 Vectrix VX-1 W/18 Leaf modules, and 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.