Product OverviewThe MT005 is a voltage-controlled battery isolator designed for 12V DC dual-battery systems. It closes at a 13.3V cut-in threshold and opens again at 12.7V, holding the open state for a 5-second delay so a brief voltage dip under load does not split the battery banks unnecessarily.In practice, this means the auxiliary battery is charged whenever the alternator or charger is working, and is separated from the starting battery once charging has finished and