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Victron Battery Diode 40A Combiner | 2 Batteries

Schottky Diode Isolation for 12V/24V Systems - 40A Continuous


Regular price $69.30
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Victron diode battery combiner with three M6 terminal bolts

Victron Battery Diode 40A Combiner | 2 Batteries

DESCRIPTION

Victron Argo Diode Battery Combiner: Reliable DC Power Isolation for Critical Systems

Continuous Power Supply with Schottky Diode Technology

The Victron Argo Diode Battery Combiner is engineered to maintain uninterrupted DC power to mission-critical equipment by enabling parallel operation of two independent battery banks. Using high-performance Schottky diodes, it ensures that a failure in one power source does not compromise the load, making it an essential component for electronic engine controls, navigation systems, and communication setups where power continuity is non-negotiable.

Unlike generic diode combiners that suffer from excessive voltage drop and heat buildup, the Argo series leverages Schottky diode technology to minimise forward voltage loss. At low current, the drop is approximately 0.3 V, rising to only 0.45 V at the rated 40 A output. This efficiency reduces energy waste and thermal stress, contributing to longer service life and stable performance in demanding environments.

Key Features

  • 40 A continuous current rating for robust power handling in 12 V and 24 V DC systems
  • Dual battery input isolation prevents reverse current flow, protecting each bank from faults in the other
  • Low forward voltage drop (0.3 V at low current, 0.45 V at rated output) thanks to Schottky diodes
  • Integrated aluminium heat sink with blue anodised cooling fins for effective thermal management
  • M6 bolt terminals (approx. 1/4"-20) for secure, low-resistance connections with heavy-duty lugs
  • Compact footprint (60 x 120 x 75 mm) and lightweight 0.8 kg design for flexible installation

Engineered for Mission-Critical Reliability

In applications such as marine electronics, emergency systems, and off-grid power setups, a single battery failure can lead to costly downtime or safety risks. The Victron Argo Diode Combiner mitigates this by isolating each battery bank. If one battery develops a short circuit or becomes discharged, the diode path blocks reverse current, allowing the healthy battery to continue supplying the load without interruption. This isolation also simplifies maintenance, as batteries can be serviced or replaced individually without shutting down the entire system.

The device's M6 bolt terminals (approx. 1/4"-20) accommodate heavy-gauge cables, ensuring minimal resistive losses even at full 40 A load. The extruded aluminium heat sink dissipates heat efficiently, but note that the surface can become hot during operation; mount only on a non-flammable surface and allow adequate ventilation.

Versatile Integration for 12 V and 24 V Systems

Compatible with both 12 V and 24 V nominal battery voltages, this combiner suits a wide range of DC architectures. Whether you are building a redundant power supply for a marine navigation suite, a backup system for an off-grid solar installation, or a dual-battery setup in a vehicle, the Argo Diode Combiner provides a straightforward, solid-state solution with no moving parts to wear out.

Typical use cases include:

  • Electronic engine control units (ECUs) on vessels and industrial machinery
  • Redundant power for communication radios and navigation instruments
  • Dual-battery systems in 4WDs, caravans, and camper trailers
  • Backup power for security systems and remote monitoring equipment
  • Solar-charged battery banks where isolation prevents backfeed at night

Installation Considerations

For optimal performance, use appropriately sized cables to minimise voltage drop. The M6 terminals accept ring lugs suitable for high-current wiring. Ensure the mounting surface is non-flammable and allows airflow around the heat sink. While the diode combiner is inherently reliable, proper fusing on each battery input is recommended to protect against overcurrent conditions.

Secure Your Critical DC Power Today

Equip your system with the Victron Argo Diode Battery Combiner to achieve dependable power redundancy. Whether you are upgrading a marine electrical panel or building a fail-safe off-grid supply, this combiner delivers the isolation and efficiency your equipment demands. Add it to your setup now and ensure continuous operation when it matters most.

SPECIFICATIONS

Specifications

ModelBCD 402
Maximum Continuous Current40 A
Number of Batteries2
Nominal Battery Voltage12 V and 24 V
ConnectionM6 Bolts
Diode TypeSchottky Diodes
Voltage Drop at Low CurrentApproximately 0.3 V
Voltage Drop at Rated OutputApproximately 0.45 V
Weight0.8 kg (1.8 lbs)
Dimensions (H x W x D)60 x 120 x 75 mm
Dimensions (H x W x D in Inches)2.4 x 4.7 x 3.0 in

SKU: Vic-BCD000402000
Barcode: 8719076020967
Model #: BCD000402000
MPN: BCD000402000

WARRANTY

Victron Energy Limited Warranty Policy

Direct Customers

Victron Energy provides the following warranty to any direct customer (OEM, distributor or dealer) in relation to any products that Victron Energy has directly sold to the direct customer. This warranty is not an end-user warranty between Victron Energy and an end-user, and end-users shall not have any rights or remedies under this limited warranty towards Victron Energy directly. The direct customer shall, in turn, ensure that the end-user is provided with a warranty identical to this warranty, subject to applicable local mandatory law.

End-Users

Victron Energy may also provide a warranty directly to end-users, in which case the below warranty conditions equally apply to such warranty. In that case, end-users shall claim their warranty at their place of purchase or through the original direct customer of Victron, which can be found through the support section on Victron’s website. Hence, the direct customer shall on behalf of Victron Energy deal with any warranty claims made under any warranty that Victron Energy may provide directly to end-users. This support section on Victron’s website will provide further guidance on the procedure for end-users to make a claim under this limited warranty.

If the end-user is a consumer – a natural person who is acting for purposes which are outside that person's trade, business, craft or profession – the following applies. The rights and remedies granted to the consumer under this limited warranty are without prejudice to the consumer’s statutory rights. Furthermore, the consumer is entitled by law to remedies from the seller free of charge in the event of a lack of conformity of the goods (such as repair, replacement, price reduction or rescission), which remedies are not affected by this limited warranty.

Warranty

Victron Energy warrants its products to be free from defects in workmanship and materials for a period of 5 years from the date of purchase by the original end-user, with a maximum of 66 months from the Victron Energy invoice date. Exceptions on this are: lead-acid batteries: 2 years from date of purchase by the original end-user, with a maximum of 30 months from the Victron Energy invoice date, Lithium batteries: 3 years from date of purchase by the original end-user, with a maximum of 42 months from the Victron Energy invoice date. In addition to this, proof of correct battery usage is required when making a battery warranty claim.

For a 10% surcharge on the current net price for products that came with a 5-year warranty, an additional 5 years of warranty can be purchased by Victron’s direct customers, bringing the total warranty to 10 years. Warranty extensions need to be applied for ultimately one year before the expiration of the original term. Victron may ask proof that the product was still functional at the time of purchase of the extended warranty.

During the warranty period, Victron Energy will, at its discretion, repair, replace or (partly) credit the defective product free of charge. The warranty does not include performing or reimbursing de‐installation, transportation, and re‐installation.

This warranty will be considered void if the unit has suffered any physical damage or alteration, either internally or externally, and does not cover damages arising from improper use like:

  • Reversed battery polarity.
  • Inadequate connection.
  • Mechanical shock or deformation.
  • Contact with liquid or oxidation by condensation.
  • Use in an inappropriate environment (dust, corrosive vapour, humidity, high temperature, biological infestation, etc.).
  • Breakage or damage due to lightning.
  • Connection terminals and screws destroyed or other damages, like overheating, due to insufficient tightening.
  • For any electronic breakage except due to lightning (reverse polarity, over‐voltage due to external cause), the state of the internal control diode and/or the input/output X and Y capacitors determine the warranty.

This warranty will not apply where the product has been misused, neglected, improperly installed, or repaired by anyone other than Victron Energy or one of its authorized Repair Centres. In order to qualify for the warranty, the product must not be disassembled or modified.

This warranty and our warranty obligations thereunder (repair, replacement or credit) are the direct customer’s and, if applicable, the end-user’s sole rights and remedies and our sole obligations with respect to any defective and/or non-conforming product or breach of warranty and is subject to and without prejudice to the limitations of liability in this warranty.

Victron Energy shall not be liable for damages, whether direct, incidental, special, or consequential, even caused by negligence or fault.

As a product requires service, it must be brought back to the place of purchase. In case no contact can be made with the merchant, or if he is either unable or not allowed to provide service, direct contact should be made with Victron Energy through the support section on Victron’s website.

In case Victron Energy replaces a product, it will own the replaced product. Victron Energy owns all parts removed from repaired products. Victron Energy uses new or reconditioned parts made by various manufacturers when performing warranty repairs or building replacement products.

If Victron Energy repairs or replaces a part of a product, its warranty term is not extended: the warranty will apply for the remaining term of the original warranty term. For example, if Victron Energy replaces a product with a 5-year warranty after 3 years, the warranty of this product will apply for another 2 years, with a minimum of 6 months.

All remedies and the measure for damages are limited to the above. Victron Energy shall in no event be liable for consequential, incidental, contingent or special damages, even if having been advised of the probability of such damages.

The foregoing limited warranty provided by Victron Energy is in lieu of any other warranties, express or implied arising by law, course of dealing, course of performance, usage of trade or otherwise, of any kind whatsoever including, without limitation, warranties of merchantability or fitness for a particular purpose, with respect to any product. The above is without prejudice to the arrangement for consumers detailed above.

Life Support Policy

As a general policy, Victron Energy does not recommend the use of any of its products in life support applications where failure or malfunction of Victron Energy's product can be reasonably expected to cause the failure of the life support device or to significantly affect its safety or effectiveness. Victron Energy does not recommend the use of any of its products in direct patient care. Victron Energy will not knowingly sell its products for use in such applications unless it receives in writing assurances satisfactory to Victron Energy that the risks of injury or damage have been minimized, the customer assumes all such risks, and the liability of Victron Energy is adequately protected under the circumstances.

Warranty on repairs for products outside their warranty period

The warranty period on products that are outside their warranty period and have been repaired by Victron Energy or one of the Victron Energy Repair centres is six (6) months from delivery. The same applies to spare parts and circuit boards that have been supplied or repaired by Victron Energy.

Transport

It is the responsibility of the sender to sufficiently package these products. The transport must be organized in a way to avoid any damage, especially when a single unit or heavy unit is sent.

Severability

If a part of the terms and conditions of this warranty is held invalid, void or unenforceable due to any particular national or international legislation, it shall not affect other parts of the terms and conditions of this warranty.

Applicable law

This warranty is exclusively governed by the laws of the Netherlands, to the exclusion of the UN Convention on Contracts for the International Sale of Goods.

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