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Argodiode 140-3AC (140A) Battery Isolator– is a highly reliable diode isolator that allows you to simultaneously charge up to three batteries from one generator without disconnecting the batteries from each other. This approach prevents the starter battery from discharging when using additional consumers from other batteries, ensuring maximum reliability and protection of the power system.
This device uses Schottky diodes, which have minimal voltage losses, and is also equipped with an input connector for excitation of the generator — this is critically important for modern generators that do not start without a B+ contact.
Key advantages of the Argodiode 140-3AC battery isolator
- Charging up to 3 batteries simultaneously from one generator
- Separation of power circuits – starting, service, backup
- Protection of the starting battery from discharge by additional consumers
- High current: up to 140 A (charging and generator)
- Low voltage drop thanks to Schottky diodes (0.3-0.45 V)
- Built-in compensation diode line – generator charge correction
- Generator excitation input – to support B+ even with diode break
- Easy connection via M8 screw terminals
Technical specifications
- Article: ARG140301020R
- Maximum charging current: 140 A
- Maximum generator current: 140 A
- Number of batteries: 3
- Nominal battery voltage: 12 V or 24 V
- Voltage drop:
≈ 0.3 V at low current
≈ 0.45 V at rated current
- Generator excitation connector: yes (6.3 mm Faston)
- Connection: M8 screw terminals
- Dimensions (mm): 60 x 120 x 150
- Weight: 1.1 kg (2.5 lbs)
Usage scenarios
- Cars with dual or triple battery systems
- Boats and yachts – separation of starting, service and reserve batteries
- Reserve power systems with several batteries
- Campers and motorhomes with separate power supply for refrigerator, lighting and inverter
- Industrial reserve systems 12/24 V
Technological features
- Schottky diodes – high efficiency, less heating
- Starting battery protection – isolated power supply
- Automatic generator start with Energize input
- Possibility of voltage drop compensation via compensation diode
- Maintenance-free – completely passive element
- Works with any battery type (AGM, GEL, LiFePO₄)