Victron Energy Argodiode Battery Isolator 140-3AC for 3 Batteries, 140A Capacity

Argodiode Battery Isolator 140-3AC - 3 Batteries - 140A

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.

The Victron Energy Argodiode Battery Isolator 140-3AC is designed to enable the simultaneous charging of up to three batteries from a single alternator without connecting the batteries directly. This feature is essential for maintaining the health and longevity of multiple batteries in applications such as RVs, boats, or commercial vehicles. The isolator ensures that discharging one battery, such as the accessory battery, does not affect the starter battery, providing reliable power separation and improved system efficiency.

Constructed with high-efficiency Schottky diodes, the Argodiode isolator boasts a low voltage drop, approximately 0.3 volts at low current and around 0.45 volts at rated output. This design minimizes power loss during charging, ensuring batteries receive optimal voltage for proper charging cycles. Additionally, all models incorporate a compensation diode that allows minor adjustment of the alternator’s output voltage to compensate for diode voltage drops, further enhancing charging performance.

Installation involves inserting the isolator within the wiring between the alternator and the batteries, which slightly reduces the charge voltage delivered to each battery. While this may prevent batteries from reaching a full 100% charge, it helps prevent premature aging and extends battery life. The device also features a specialized current-limited energize input, which ensures that the alternator receives the necessary DC voltage to start charging when the engine is running, even with a closed engine run/stop switch. This feature is particularly beneficial for systems requiring reliable startup conditions.

Designed for durability and efficiency, the Victron Argodiode Battery Isolator 140-3AC is ideal for demanding power systems requiring reliable battery management. Its robust construction and intelligent features make it suitable for a variety of vehicle and marine applications where managing multiple batteries is critical for operational success.

Features:

• Supports charging of three batteries simultaneously from one alternator

• High-efficiency Schottky diodes with low voltage drop (approximately 0.3V at low current, 0.45V at rated output)

• Includes a compensation diode to adjust alternator output voltage and improve charging efficiency

• Designed with a current-limited energize input for reliable alternator startup

• Constructed for durability and reliable performance in demanding environments