Victron Battery Diode 40A Combiner | 2 Batteries
Schottky Diode Isolation for 12V/24V Systems - 40A Continuous
Victron Battery Diode 80A Combiner | 2 BatteriesDESCRIPTION
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.
SKU: Vic-BCD000402000
SPECIFICATIONS
Specifications
| Model | BCD 402 |
|---|---|
| Maximum Continuous Current | 40 A |
| Number of Batteries | 2 |
| Nominal Battery Voltage | 12 V and 24 V |
| Connection | M6 Bolts |
| Diode Type | Schottky Diodes |
| Voltage Drop at Low Current | Approximately 0.3 V |
| Voltage Drop at Rated Output | Approximately 0.45 V |
| Weight | 0.8 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
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 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 end user, with a maximum of 30 months from the Victron Energy invoice date, Lithium-ion batteries; 3 years from date of purchase by the end user. In addition to this proof of correct battery usage is required when making a battery warranty claim.
During this period, Victron Energy will, at its option, repair or replace 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: • Reverse of battery polarity. • Inadequate connection. • Mechanical shock or deformation. • Contact with liquid or oxidation by condensation. • Use in inappropriate environment (dust, corrosive vapor, humidity, high temperature, biological infestation...). • Breakage or damage due to lightning. • Connection terminals and screws destroyed or other damages, like overheat, due to insufficient tightening. • For any electronical breakage except due to lightning (reverse polarity, over‐voltage due to external cause), the state ofthe internal control diode and of the inputs/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 else than Victron Energy or one of its authorized Qualified Service Partners. In order to qualify for the warranty, the product must not be disassembled or modified.
Repair or replacement are our sole remedies and Victron Energy shall not be liable for damages, whether direct, incidental,special, or consequential, even caused by negligence or fault.
Victron Energy owns all parts removed from repaired products. Victron Energy uses new or reconditioned parts made by various manufacturers in performing warranty repairs and building replacement products. If Victron Energy repairs or replaces a part of a product, its warranty term is not extended. In case of replacement the new component has a warranty of 6 months, without effect on the initial warranty period. All remedies and the measure for damages are limited to the above. Victron Energy shall in no event be liable for consequential, incidental, contingent orspecial damages, even if having been advised of the probability of such damages. Any and all other warranties expressed or implied arising by law, course of dealing, course of performance, usage of trade or otherwise, including but not limited to implied warranties of merchantability and fitness for a particular purpose, are limited in duration to a period of two (2) years from the date of purchase.
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 the Victron Energy's product can be reasonably expected to cause 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.
As a product requires service, it must be brought back to the place of purchase. In case no contact can be taken with the merchant, or if he is either unable or not allowed to provide service, direct contact should be taken with Victron Energy.
Warranty on Repairs The warranty period on products or on printed circuits boards repaired by Victron Energy as well as on printed circuit boards for replacement is 6 months from delivery 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 set out above 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 remaining.
For Australia only Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
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