Blue Sea BatteryLink (TM) 12/24V 120A Stud Mount Battery Voltage Sensing Relay 7611 69-0585

In a boat or vehicle with two battery banks, it is useful to be able to charge both banks while underway. Charge management devices allow two battery banks to be charged from a single source, such as an alternator. It includes an 1/0 AWG cable & 3/8 inch-16 stud. It features a clip-on cover stud insulation.