Most people just need to replace their old wiring or upgrade to something larger.

Old boats, for the most part, were never designed to have this much DC load on the bow of a boat. I too have an old boat and I ran a 6 gauge wire when I upgraded my troller to a 24 volt setup. I then used my old 10 gauge wire for the scope. I have no issues running my live well constantly on a timer and the scope for 8 hours with an $80 group 27 and staying well above 12 volts. A lot of wiring out there just needs to be replaced. DC voltage , oxygen, water and copper dont mix well over a decade or so. Moisture will creep up the copper wiring and lose its efficiency and conductivity and thats not even considering the length run for voltage loss. I still keep a cheap jump box with me just in case, and I would recommend everyone pick one of these up, especially if you spend a lot of your time on the AR river.