I've got a 400w inverter I use with my aux battery.  I am thinking about
installing a switch that will switch the whole 110v wiring system of the
van to either the outside hookup or the inverter.  I would use a big DPDT
switch and switch both the hot and neutral lines.  Help me troubleshoot
this idea.  I'm trying to think of a situation where I might want to use
both power sources at the same time.  I can't think of one.  I typically
use the inverter to run the fridge while driving, and the occasional other
small AC load.  So it is awkward to crawl under the cabinet and switch the
fridge AC lead from the inverter to outlet or vice-verse.  Or to plug in an
AC light, camera battery charger, etc.  Hmm, just thought of the onboard
battery charger.  I would not want that to ever be plugged into the
inverter, charging the battery that is running the inverter.  Any thoughts?

Edward