Discharging the accessory battery for example will not result in also discharging the starter battery.
Alternator energize inputSome alternators need DC voltage on the B+ output to start charging. Obviously, DC will be present when the alternator is directly connected to a battery. Inserting a Diode or FET splitter will however prevent any return voltage/current from the batteries to the B+, and the alternator will not start.The new ‘AC’ diode isolators feature a special current limited energize input that will power the B+ when the engine run/stop switch is closed.
Maximum charge current (A) - 80А
Maximum alternator current (A)- 80А
Number of batteries- 2
Alternator Energize Input- yes