Yes it will handle the power. SeaRay actually includes a cigarette lighter end connected to a 12-14 gauge wire fit with battery connections for exactly that purpose i.e., some people take their batteries out when the boat is stored in the colder/winter climates and connecting the cigarette lighter end to the 12 volt power outlet at the helm with the other end to a 12 volt battery pack works line a charm.
Trust me, with the amount or repairs that I had to do this past winter in my engine room (associated with Hurricane Sandy damage) it was the only way that I could lift the hatch.....