I have a new Thunderbolt 386x12 that every time I put it in storage for even a week, it will draw the battery down to where it will not have enough power to raise the gear. I always turn off the disco...
Some fact switches do not completely shut if off. I always run EVERY load wire to the switch. Put the switch on the battery or close to them & make sure nothing else is connected to the pos side of the batt. If it is on the grd side & has a gen it will grd through the gen mounting & still draw.