Victron Battery Diode 80A Combiner | 2 Batteries
80A Continuous, Schottky Diodes, 0.45V Drop, 12V/24V, M6 Terminals
Blue Sea 24V 500A ML Series Auto Charge RelayDESCRIPTION
Victron 80A Diode Battery Combiner: Reliable Dual-Battery Isolation for Critical DC Systems
Continuous Power for Mission-Critical Equipment
The Victron 80A Diode Battery Combiner (model BCD 802) is engineered to maintain uninterrupted DC power to essential electronics, such as engine control units, navigation systems, and communication gear. By allowing two independent battery banks to feed a common load through high-efficiency Schottky diodes, this unit ensures that a failure in one battery source will not compromise the supply to your critical equipment. Whether you're operating a commercial vessel, an off-grid power system, or a remote monitoring station, this combiner provides the redundancy needed to keep vital systems online.
Unlike basic relay-based isolators, the diode design offers instantaneous, maintenance-free switching with no moving parts. The low forward voltage drop—approximately 0.3 V at low current and 0.45 V at the full 80 A rating—minimises energy loss while preserving isolation between battery banks. This makes it an ideal solution for 12 V and 24 V DC systems where reliability is non-negotiable.
Schottky Diode Technology: Efficiency and Thermal Management
At the core of the combiner are Schottky diodes, selected for their exceptionally low forward voltage characteristics. This reduces heat generation compared to standard silicon diodes, allowing the unit to sustain an 80 A continuous current without active cooling. The integrated aluminium heat sink with cooling fins dissipates thermal energy effectively, even in confined installations. For optimal safety, the combiner must be mounted on a non-flammable surface, as the enclosure can reach elevated temperatures during high-load operation.
The robust metal housing and blue anodised finish provide durability in harsh environments, including marine engine rooms and industrial enclosures. Pre-slotted mounting holes enable secure vertical or horizontal installation, while the M6 bolt terminals (approx. 1/4"-20) accept heavy-duty ring lugs for reliable, low-resistance connections.
Key Features
- 80 A continuous current rating for demanding DC loads
- Dual-battery input with isolated diode paths prevents back-feeding
- Low voltage drop (0.3 V at low current, 0.45 V at rated output) maximises available voltage
- Schottky diode design reduces heat and improves efficiency
- Integrated aluminium heat sink for passive thermal management
- M6 bolt terminals (approx. 1/4"-20) for secure, high-current connections
- Compact footprint (60 x 120 x 75 mm) suits space-constrained installations
- Compatible with 12 V and 24 V nominal battery systems
Applications Where Redundancy Matters
This diode combiner is purpose-built for scenarios where power continuity is critical. Common use cases include:
- Marine electronics: Supply navigation lights, GPS, and autopilots from two battery banks without risk of cross-drain.
- Emergency and safety systems: Keep fire alarms, bilge pumps, and communication radios powered even if one battery fails.
- Off-grid and remote installations: Combine solar-charged and generator-backed battery banks for uninterrupted DC supply.
- Vehicle and heavy equipment: Isolate starter and auxiliary batteries while sharing a common load like a winch or hydraulic pump.
By eliminating single points of failure in your DC power architecture, the Victron BCD 802 reduces the risk of unexpected downtime and protects sensitive electronics from voltage transients that can occur with relay-based combiners.
Installation and Safety Considerations
Installation is straightforward: connect each battery bank to the designated input terminals and the load to the common output. The diode arrangement inherently blocks reverse current, so no additional switching or control wiring is required. However, due to the heat generated at full load, the unit must be mounted on a non-flammable surface with adequate ventilation. The compact dimensions (60 x 120 x 75 mm) and lightweight design (0.8 kg) allow flexible placement in electrical panels or bulkhead mounts.
For optimal performance, use appropriately sized cables and ensure all connections are torqued to the M6 terminal specifications. The combiner is rated for both 12 V and 24 V systems, making it versatile across a range of DC architectures.
Secure Your Critical Power Path
When power continuity is essential, trust the Victron 80A Diode Battery Combiner to deliver reliable isolation and uninterrupted DC supply. Add the BCD 802 to your system today and ensure your mission-critical equipment stays online, no matter what.
SKU: Vic-BCD000802000
SPECIFICATIONS
Specifications
| Maximum Continuous Current | 80 A |
|---|---|
| Number of Batteries | 2 |
| Nominal Battery Voltage | 12 V and 24 V |
| Connection | M6 Bolts |
| Weight | 0.8 kg (1.8 lbs) |
| Dimensions H x W x D | 60 x 120 x 75 mm (2.4 x 4.7 x 3.0 inches) |
| Voltage Drop at Low Current | Approximately 0.3 V |
| Voltage Drop at Rated Output | Approximately 0.45 V |
| SKU: | Vic-BCD000802000 |
| Barcode: | 8719076020974 |
| Model #: | BCD000802000 |
| MPN: | BCD000802000 |
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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