Victron Energy Argo Diode Battery Combiner, For 2 Batteries, 12V and 24V, M6 Bolts

Overview

The Victron Energy Argo Diode Battery Combiner is a diode-based battery combiner for keeping a critical DC load powered from two available DC sources. It is used in 12V and 24V battery systems and is available in 40A or 80A maximum continuous current versions, both built around a two-battery layout.

On a boat, this type of unit is most often used where interruption is not acceptable, such as an electronic engine control system or another essential DC circuit. Two DC power sources can feed the same load in parallel, and if one source drops out, the other can continue supplying the critical load.

The combiner uses Schottky diodes for low voltage drop, with approximately 0.3 V drop at low current and approximately 0.45 V at rated output. Both variants use M6 bolt connections and share the same 60 x 120 x 75 mm housing size, which helps when planning a battery compartment, technical locker, or protected electrical panel installation.

Key features

• Combines two DC power sources to supply one mission-critical DC load.
• Available in 40A and 80A maximum continuous current versions for different load requirements.
• Suitable for 12V and 24V battery systems commonly found on marine DC installations.
• Schottky diode design keeps voltage drop low, approximately 0.3 V at low current and approximately 0.45 V at rated output.
• Failure of one connected source does not interrupt power to the critical load.
• M6 bolt connections support secure cable termination in a vibration-prone onboard electrical space.
• Compact 60 x 120 x 75 mm footprint with the same 0.8 kg weight across both variants.

Variants

This product is offered in two configurations that differ by maximum continuous current rating.

Both variants are made for two batteries, work with 12V and 24V nominal battery systems, use M6 bolt connections, and share the same dimensions and weight. The current rating is the key selection point when matching the combiner to the protected DC load.

• BCD000402000: Maximum Continuous Current 40A. This is the lower-current configuration in the range and keeps the same two-source, one-load layout as the 80A version.
• BCD000802000: Maximum Continuous Current 80A. This is the higher-current configuration in the range while retaining the same voltage support, connection style, and housing size.

Installation and setup

Mount the unit close enough to the batteries and protected load to keep cable runs sensible, while still leaving room for properly sized conductors, terminals, and service access. Because the housing can become hot in operation, it must be mounted on a non-flammable surface with adequate clearance around it.

The three-bolt layout is straightforward: each DC source connects to an input, and the protected DC load connects to the output. Cable sizing, overcurrent protection, and installation practices should match the current rating selected and the vessel’s DC electrical standards.

Electrical and system integration

The Argo Diode Battery Combiner is a simple fit for boats that need a dedicated backup path for an essential DC consumer without adding switching complexity at the load. It can be used in installations where two batteries or DC sources are available and the priority is keeping one critical circuit alive.

This product is a practical match for marine electrical refits, engine control power feeds, and other onboard DC systems where a single source failure should not shut down the connected equipment. It is not a charger or a battery monitor, so it should be integrated as part of a complete DC system with correct fusing and wiring.