Today, I learned the hard way about this myself. Dropped the rig off at the storage lot a few weeks ago, and turned the disconnect off; thinking that would kill off anything that may drain the battery. Returned today, hooked up truck, and when I went to retract the landing gear.... nothing but a weird grinding noise. I hooked the 7way to my truck and let it idle for about a half hour. Still not enough voltage to operate the landing gear. I was so upset, I didn't even think to go ahead and remove the battery and bring it home to charge... silly... I guess another hour round trip to the storeage lot is in my future. I just had to unhook and return home with my tail between my legs...
I'll reach out to Alliance and hopefully will better understand if there is a wiring issue, or if in fact I need to install another battery disconnect, maybe on the negative terminal.