Yes, it should be. I believe all Axis/Vegas units have these.
I am posting a link to the page where you can see how this thing works. THIS is the document that I was remembering when I said that one thing should NOT be able to draw down both your house and coach batteries, even though they are connected.
Quoting from this document: "The Battery Isolation Manager
(BIM) isolates the two battery systems, chassis, and
coach, in a motorhome. This prevents loads in one
system from discharging both
. It also connects the two
battery systems together during charging. Both batteries
are charged if either is being charged. The coach
battery is charged while driving and the chassis battery
is charged while plugged into Shore Power at a