Parallax Power Supply 7345

Another thought, if you go to a 55 amp converter check to make sure the wiring is adequate to handle 55 amps. If you do much off the grid camping you might want to increase the wire size anyway to take full advantage of the faster charging ability of the 3 or 4 stage converter.

I replaced my Parallax 7345 with a PD and changed the wire between the battery and converter to #4 AWG.