Argodiode Battery Isolator 180-3AC - 3 Batteries - 180A

Argodiode Battery Isolators allow simultaneous charging of two or more batteries
from one alternator, without connecting the batteries. Discharging the accessory
battery for example will not result in also discharging the starter battery. Low
voltage drop due to the use of high-efficiency Schottky diodes.

The Argo Battery Isolators feature a low voltage drop thanks to the use of
Schottky diodes: at low current, the voltage drop is approximately 0,3 V, and at
the rated output of approximately 0,45 V. All models are fitted with a
compensation diode that can be used to slightly increase the output voltage of
the alternator. This compensates for the voltage drop over the diodes in the
isolator. 

Simply inserting the isolator in the cabling between the alternator and the
batteries will slightly reduce charge voltage. The result can be that batteries
are not charged to the full 100% and age prematurely. 

Alternator energize input

Some 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.