Francisco: Do a search here for for the following words: isolator, separator, blue sea, surepower, acr, 7622.....
there are lots of threads about isolators and separators
They are different; I would consider a blue Sea Separator
Sure Power makes isolators and separators as well....
Separators are available as one-way or bidirectional as well.....bi-directional is handy if you have solar and want to charge the starting battery as well as the house/coach battery.
2008 E350 RB passenger 4WD SMB penthouse
2013 KTM 350 EXC
2008 KTM 250 XCF-W
2000 KTM 200 EXC
2003 Honda Element