I just installed a PD4045 in our
Uhaul but haven't really tested it, just a two night weekend trip. It has 12 wires out the back for the 12 volt circuits, they are numbered to match the fuses inside. A couple of the wires were labeled wrong, they didn't match up with the fuse numbers so check that out if you get one. It has room for 4 breakers, one is used as the main, I used another to power the converter section, that left two for
lights and outlets.