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Argo Diode Battery Isolators 120A dual output View larger

Argo Diode Battery Isolators 120A dual output

€ 84,70 tax incl.

€ 77,00 tax excl.



Diode battery isolators allow simultaneous charging of two or more batteries from one alternator, without connecting the batteries together. Discharging the accessory battery for example will not result in also discharging the starter battery. 

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Argo Diode Battery Isolators 120A dual output

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.

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.

Technical Specification

Model: ARG120201020
Maximum charge current: 120A
Maximum alternator current: 120A
Number of batteries: 2
Alternator Energize Input: Yes
Connection: M8 Studs
Compensation diode and Energize connection: 6,3 mm Faston


2 years warranty


Connection Diagram



  Data Sheet EN [LINK]
  Product Manual Multi-Lingua [LINK]
  IEC Certification [LINK]
  Certification of Conformity EN [LINK]


  Per assistenza e configurazione impianti chiama il numero 0882 22 82 47
  Per richieste di assistenza tecnica, scrivi a [email protected]
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