The latest Ultra III conversion kit. Simple drop-in, "Plug and play" 3-stage converter/charger replacement kit for the Magnetek, Parallax, Phillips or B-W Manufacturers 6300 or 7300 Series converter/charger. Simple to install and includes mounting plate, DC fuse board, wires, and screw set. Also includes the popular book Managing 12 Volts by Harold Barre. Dont forget to look at the photos for the installation procedure. 3-stage charging voltages are perfect (14.4 boost, 13.6 nominal, 13.2 float) Compatible with standard lead acid or AGM deep cycle batteries. Two-year warranty.