Ok... I have Never run a Cabo and I am not familiar with their set up BUT generally speaking battery chargers almost always have lower output than alternators installed on mains... I can't imagine a Cabo using that much DC Power that stock alternators can't keep up and need to rely on the battery charger. I would NEVER buy a boat where you must rely on the charger to keep batteries charged... That is a lousy setup as if the charger fails it s game over and you have to come home. As to chargers conflicting with alternators, it may be an issue on some older set ups (not sure how old is the raritan charger mentioned ) but once the alternators kick in the charger will sense the higher voltage and back off. Heck even my old Pro mariner does this on my 40 year old Hatt!