I'm running quite a bit off a 1 battery system and I'm wondering if I need to switch to dual. Beyond factory options, I'm running a roof mounted light bar, a front winch, and bumper mounted off road lights. I'm contiplating adding a winch in my bed just below the rear window because I'm getting too old to lug gear into the back. Of course I won't be running everything at once. The bed mounted atv winch would never run at the same time as the other things I mentioned. Is it time to suck it up and run dual batteries or can I pull this off with one? TIA!