you might want to read this link:
viewtopic.php?f=41&t=6345&hilit=isolators
note that SMB is now using the blue sea 7622 MCR
SMB hasen't installed many 7622's with the full remote like I have mainly because the relay has full controls on the unit itself but I want a remote because it's difficult to reach my separator. Plus visually I can see how it's working (it has indicator lights). Mine is also wired to disconnect the house system when starting the vehicle. I want to know when I'm haveing issues with my starting battery system. If I need to jump start I'll manually close it to assist start.