Best ratings
1 . NAUTIC POWER - Lossless Diode Distributor / 90 A / 2 batteries
„Easy to fit.“
2 . VICTRON ARGO 120-2 Isolation Diode / Shottky / 120 A / 2 battery banks
„After winter storage, the engine had a problem when running. Overvoltage of around 15.7V on the batteries. First I replaced the alternator, but nothing. After that I replaced this Victron isolating diode block. Now everything is OK. For the first time in winter I left the two large supply batteries, each with 120AH, in the boat, only removed the separate starter battery and fully charged it before installing it. This difference in charge must have destroyed the "old" diodes.“
3 . VICTRON ARGO 80-2 Isolation Diode / Shottky / 80A / 2 battery banks
„Great product, the price is ok too. I would be happy to order again from the SVB. I don't know what's going on with the squad, but the advisory staff got 100 stars from me. So far I have not known any shop that can offer professional and good advice on products that are so friendly. The staff is so friendly that you are motivated to order something from them again. Thank you very much for your great commitment and stay professional and friendly. Will soon find something for me in your shop again“
Isolating/Coupler Diodes for Boats
Isolation diodes allow for the simultaneous charging of multiple boat batteries from an alternator or a battery charger without needing to connect the individual batteries in parallel. Looking to buy isolation diodes? Explore our selection of isolation diodes for 2 batteries and 3 batteries for your boat. Discover various options to separate your onboard charging system. With us, you’ll find lossless charge distributors from VICTRON and QUICK, isolation diodes, automatic charging relays, and battery switches. Learn what you need them for and the advantages of each method.
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Order by
Ratings
Price range
€
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Operating voltage
Charging outputs
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Height
mm
Max. charging current
A
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kg
Width
mm
VICTRON
BCD402 Diode Battery Combiner for two batteries / 40A / 12/24V
only
€44.95
2
VICTRON
BCD802 Diode Battery Combiner for two batteries / 80A / 12/24V
only
€54.95
4
-7%
VICTRON
ARGO 80-2 Isolation Diode / Shottky / 80A / 2 battery banks
€63.07
only
€58.95
10
-13%
VICTRON
ARGO 100-3 Isolation Diode / Shottky / 100A / 3 battery banks
€85.68
only
€74.95
4
-12%
VICTRON
ARGO 120-2 Isolation Diode / Shottky / 120 A / 2 battery banks
€96.39
only
€84.95
8
-9%
VICTRON
ARGO 140-3 Isolation Diode / Shottky / 140 A / 3 battery banks
€121.38
only
€109.95
5
Made in Europe
NAUTIC POWER - Lossless Diode Distributor / 90 A / 2 batteries
only
€109.95
11
NAUTIC POWER - Lossless Diode Distributor / 90 A / 3 batteries
only
€149.95
2
Isolation Diodes for Boats
- Charge up to 3 batteries simultaneously -
What is important when choosing isolating diodes & charging relays?
When choosing isolating diodes/relays, always keep in mind the maximum possible charging current. For example, if your alternator has 50-70 amps output, a 70 amp isolating diode will be enough.
What are the advantages of isolators on board?
Isolators are used so that individual batteries do not need to be connected in parallel. This prevents starter batteries and batteries that supply other devices, such as the lighting or bow thruster with power from being mutually dishcarged.
What are the advantages of isolators with integrated compensating diode?
Commercially available isolating diodes cause a voltage drop of between 0.3 and 1.2 V, depending on their design. This may not sound like much, but the result is an incomplete charging process and batteries will not be charged 100%. Our isolating diodes feature Schottky diodes with a voltage drop of 0.7 V. Using isolating diodes with integrated compensating diode reduces the voltage drop to almost 0.005 V. For these diodes a cable must be connected from D+ alternator to the diodes distributor.
Customer ratings & reviews
All reviews (203.675)
Ivan M. on 05.06.2026
Objednavka dosla vporiadku dakujem
Michael P. on 04.06.2026
Ordering process great, communication fantastic, DHL delivery was also great, I use SVB a lot!
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