Victron Argodiode 120-2AC Battery Isolator - 2 Batteries - 120A 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 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.
Please see our book ‘Energy Unlimited’ or ask for specialist advice when installing a diode 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.
Maximum charge current (A) - 120
Maximum alternator current (A) - 120
Number of batteries - 2
Nominal battery voltage - 12V and 24V
Alternator Energize Input - Yes
Connection - M8 Studs
Compensation diode and Energize connection - 6,3mm Faston
Weight kg (lbs) - 0.8 (1,8)
Dimensions h x w x d in mm (h x w x d in inches) - 60 x 120 x 115 (2.4 x 4.7 x 4.5) | 
