Ours came with wiring from the battery to a spot behind a wall in the front storage bin, the solor controller with wiring to the roof for panels and from the controller to the Vault. I had to install the inverter, connect it to those pre-run cables, and add a short jumper inside the Vault between the fuse and the switch. I also could have installed the transfer switch so that power would automatically switch from shore to inverter, but chose not to and will just plug the shore power line into the inverter the few times we would do it. Ours had a disconnect right next to the pre-wired inverter cables to make that easy, though finding the right part with connectors was difficult. As an aside, from the factory they didn't connect he solar controller negative so had to fix that, sloppy. Other than fixing that wire which was difficult to get to, it was pretty easy if you are handy. There's a good youtube video walkthrough (I'll attach the link when my account lets me).