Question on how this relates to Isolators though, If you take existing single battery banks, and turn them into "Big SPAM ALERT - REPORT TO ADMIN A" and "Big SPAM ALERT - REPORT TO ADMIN B" by combining batteries in parallel, Does this really matter to your isolator at all? You've greatly increased your available amperage, and possibly flow from the alternator to the batteries, so does the Isolator need to be upgraded? Do they (Isolators) have specific amperage ratings, or is that more dependent on what the alternator creates and connected accessories can draw than what the Batteries can deliver?
D.O.A. 1989 Chevrolet V3500 4x4 Type I