Description
xVictron BCD 802 Diode Battery Combiner – 2 Batteries, 80A
The Victron BCD 802 is a diode-based battery combiner designed to charge two separate battery banks simultaneously from a single charging source, without allowing the banks to discharge into one another. It is suited to marine, vehicle and off-grid installations where battery isolation between a starter battery and a service bank is required.
Key Features
- Combines two battery banks from a single charging source using Schottky diodes, preventing reverse current flow between banks.
- Rated at 80A continuous current, covering the majority of alternator and charger outputs used in 12V and 24V systems.
- Supports two output battery connections, keeping starter and leisure or service batteries electrically isolated during discharge.
- Compact and lightweight at 0.49 kg, suitable for installation in confined spaces such as engine bays and vehicle battery compartments.
- No moving parts and no control electronics, giving a passive, maintenance-free installation.
- Compatible with standard alternator and battery charger inputs across 12V and 24V systems.
Product Overview
Diode battery combiners work by allowing current to flow from the charging source to both battery banks simultaneously, while the diodes block any current flowing back from one bank to the other. This means a flat service battery cannot drain the starter battery, and vice versa. The BCD 802 uses Schottky diodes, which have a lower forward voltage drop than standard silicon diodes, reducing heat generation and improving charging efficiency.
The 80A rating makes this unit appropriate for most single-alternator installations in boats, motorhomes, campervans and light commercial vehicles. It is a passive device with no relays, no control board and no software dependency. Once wired correctly, it operates without any user intervention. The voltage drop across the diodes (typically 0.3V to 0.6V for Schottky types) should be accounted for when setting the charging voltage on the source, particularly in temperature-sensitive battery chemistries such as lithium.
Specifications
- SKU: BCD000802000
- Model: BCD 802
- Number of battery outputs: 2
- Maximum continuous current: 80A
- Weight: 0.49 kg
- GTIN: 8719076020974
Applications
- Marine installations requiring isolation between engine start and domestic battery banks.
- Motorhomes and campervans with a split-charge requirement between vehicle starter and leisure batteries.
- Light commercial vehicles with auxiliary battery banks for refrigeration or equipment power.
- Off-grid cabins or vehicles where a single solar charge controller or alternator feeds two separate battery banks.
- Backup power systems requiring two independently dischargeable battery banks from one charger.
What Is Included
- 1 x Victron BCD 802 diode battery combiner
Installation Notes
The BCD 802 should be mounted in a well-ventilated location, as diodes generate heat under load. Ensure the mounting surface can dissipate heat adequately, particularly at sustained high currents. All wiring should be appropriately rated for the maximum current and protected with correctly sized fuses on each output. The inherent voltage drop across the diodes means the charging source voltage may need to be increased slightly to compensate, particularly for AGM or lithium battery chemistries with tight charge voltage tolerances. Installation should be carried out by a qualified auto-electrician or marine electrician familiar with multi-battery systems.
Return Policy
xWe offer a 14-day, no-quibble returns or replacement policy because we want you to be totally satisfied with your purchase.
If you are unhappy in any way with your purchase, you can return it for a refund or a replacement, as long as you return it in the same condition as it arrived (original/undamaged packaging and product) and within 30 days of receiving it. We will pay for your return postage on a faulty item as long as you send it using Royal Mail 2nd class recorded delivery (for EU or International Shipments, you have to use our UPS account, we will provide you with a return label)
Please keep in mind the following:
- Non-faulty items returned after 14 days and/or not in their original, undamaged packaging can only be exchanged for store credit - 15% off the items returned.
- Items returned within 14 days but not in their original and undamaged packaging will also incur a -15% charge per package.
- If you return an item that doesn't adhere to our returns procedure or doesn't include a returns form, you may be liable for a £10 administration fee
- Individual items from a bundle can't be returned, refunded or exchanged. If you want a refund/credit/exchange for a bundle, all items must be returned to us.
Before you return your item, please make sure that:
- You follow our returns process (outlined below)
- The goods and packaging are undamaged
IMPORTANT: We need to be able to identify an item with your order. We can only do this if you follow our returns process. Please do not send us items back that do not follow this process as they cannot be identified properly and will not be replaced or refunded.
What delivery method do I need to use when returning an item?
You must send the goods back to us via Royal Mail 2nd class recorded delivery. Refunds on faulty items returned are reimbursed within 5 working days.
Can I return just one item from multiple purchases?
Yes. Once you start the returns process you will go to a page that will allow you to choose which items you want to be replaced or refunded.
Returning faulty goods
If your item is faulty, you need to follow the returns policy, where you will be able to state that it’s faulty. The product will then arrive at our warehouse for testing.
If your purchase is not within 14 days
You can still exchange your item for a different product or for credit to use on the Voltacon Solar or Ledison-led-lights.co.uk websites (-15% from the credit amount).
Returns outside of the 14-day period do not qualify for the free returns policy.
Returning an item within the warranty
If you have a warranty and want to return a faulty item, you just need to follow our standard returns process. When we receive your item, we will then check that it’s within warranty and for any faults before arranging a replacement.