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

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 efficiently manage the simultaneous charging of up to three batteries from a single alternator without the need for direct battery connections. This setup ensures that discharging the accessory battery does not impact the starter battery, providing reliable power management for automotive, RV, or marine applications. Equipped with high-efficiency Schottky diodes, this isolator features a low voltage drop—approximately 0.3 volts at low current and around 0.45 volts at rated output—minimizing energy loss during operation. The inclusion of a compensation diode allows for slight adjustments to the alternator's output voltage, counteracting voltage drops across the diodes to ensure batteries are fully charged and maintained properly. Simply inserting the isolator into the cabling between the alternator and the batteries provides an effective solution for managing multiple power sources while preserving battery health and longevity. When installed correctly, it helps prevent premature battery aging caused by incomplete charging cycles. The AC diode isolators also include a specialized current-limited energize input that enables the alternator to start charging when the engine run/stop switch is engaged, even if some alternators require a DC voltage on the B+ output for activation. This feature enhances compatibility across various vehicle setups, ensuring reliable operation without additional wiring modifications. Whether used in automotive, marine, or off-grid systems, the Victron Argodiode Battery Isolator offers a robust and efficient way to optimize battery charging and power distribution, contributing to system reliability and longevity.

Features:

• Supports simultaneous charging of three batteries from one alternator

• Low voltage drop thanks to high-efficiency Schottky diodes

• Voltage drop approximately 0.3V at low current, 0.45V at rated output

• Includes a compensation diode to offset voltage drop

• AC diode isolators feature a current-limited energize input for reliable alternator activation