. . . the choice is really a personal one . . . I run a reducer because I don't want to be bothered with another charger . . . others run an aux battery . . . if you choose to go the reducer route, just make sure you get one with sufficient amperage for what you are planning . . . most people select a 20Amp as minimum . . . many go the 30 Amp route for ability to add several accessories . . .