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The Argodiode 80-2AC Battery Separator (80A) – is a highly reliable diode isolator designed for simultaneously charging two independent batteries from a single operating alternator. At the same time, galvanic isolation prevents energy flow between the batteries. This technical solution eliminates the accidental discharge of the main starter battery during intensive use of the service battery group, ensuring maximum autonomy and fault tolerance of the power supply system.
The device is based on high-grade Schottky diodes, characterized by extremely low voltage losses. A feature of the model is the presence of a special connector for alternator excitation — this is a vital element for the correct operation of modern car alternators, which require a B+ contact to start generating current.
The most important advantages of the Argodiode 80-2AC diode isolator
- Parallel charging of 2 batteries from a single alternator
- Complete separation of power supply circuits – starter, domestic, and backup
- Guaranteed protection of the starter battery from being drained by additional onboard consumers
- Impressive current output: support up to 80 A (both from the charger and from the alternator)
- Minimal voltage drop due to the use of Schottky diodes (within 0.3–0.45 V)
- Integrated compensation diode – for fine correction of charge parameters
- Initial excitation contact – supplies a starting B+ pulse to the alternator through the diode isolation
- Maximum reliable fixation of power cables using M6 screw terminals
Operational parameters
- Product code: ARG080201000 (R)
- Permissible charge current: 80 A
- Permissible alternator current: 80 A
- Number of serviced batteries: 2
- Operating network voltage: 12 V or 24 V
- Voltage drop:
≈ 0.3 V (in low current mode)
≈ 0.45 V (at nominal load)
- Alternator excitation terminal: present (6.3 mm Faston type connector)
- Terminal format: M6 screw contacts
- Physical dimensions (in mm): 60 x 120 x 90
- Device weight: 0.6 kg (1.3 lbs)
Spheres of practical application
- SUVs and expedition vehicles with two batteries
- Marine transport (boats, yachts) – to isolate the engine, living, and backup battery banks
- Powerful backup power stations with separate battery groups
- Motorhomes and camper vans with a complex electrical network (inverters, refrigerators, climate control)
- Industrial 12/24 V emergency power supply complexes
Features of applied technologies
- Schottky type diodes – provide high efficiency and reduce the risk of overheating
- Isolated power supply – 100% protection of the starter energy source
- Reliable alternator start thanks to the Energize input function
- Adaptive correction of voltage drop using a compensation diode line
- Passive and fail-safe operation – does not require programming and maintenance
- Versatility – excellently charges any batteries (including AGM, GEL, and lithium LiFePO₄)