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Victron Smart BuckBoost 50A DC/DC Charger – 12/12 Non-Isolated Battery to Battery Charger

The Victron Smart BuckBoost battery charger (sometimes referred to as a B2B or DC/DC) redefines adaptive DC-DC charging. For use in dual battery systems charged with an (intelligent) alternator, the charger intelligently and safely charges your leisure batteries from your vehicle’s starter battery whilst driving. The Smart BuckBoost is simple to install and simply requires access to the vehicle’s starter battery.

  • 50A (700W) charging current
  • For 12V systems
  • Intelligent charging to protect both batteries
  • Smart functionality allows settings and performance to be monitored


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Victron Smart BuckBoost DC-DC Charger non-isolated 12/12-50 700 Watt

The Victron Smart BuckBoost 50A non-isolated battery to battery charger (sometimes referred to as a B2B or DC-DC charger) redefines adaptive DC-DC charging. For use in dual battery systems charged with an (intelligent) alternator. This device not only ensures top-tier performance but also guarantees the safety of your system.

The Victron Smart BuckBoost battery to battery charger serves as a DC-DC battery charger or as a power supply, offering a wide input and output voltage range. This is especially significant in the case of vehicles with a Euro 5 or Euro 6 smart alternator, which often supplies too low charging voltage even when the engine is running or when extended cable lengths, as is often the case in boats and RVs, lead to voltage drops. In such scenarios, precise and controlled charging is imperative to fully charge the service battery while protecting the starter/input battery from discharge.


  • Adjustable charging current
  • Smart alternator compatibility
  • Adaptive 4-stage charge algorithm
  • Low temperature shutdown and input undervoltage protection
  • Remote on/off
  • Comprehensive electronic protection
  • Can be paralleled to increase output current
  • Bluetooth Smart enabled


Smart functionality

The Victron DC-DC chargers have built-in Bluetooth, allowing you to connect wirelessly to the VictronConnect App (downloadable from the Play store on Android and the App Store on iOS). You can monitor and program the unit via Bluetooth, and remotely control it via a remote on/off switch. It also has an engine running detection mechanism.

Screw terminal connection points

The Victron Battery to Battery Charger 50A has screw terminal connection points. So, you will need to strip your wires of a short length of insulation to fix them to the screwed terminal.

Battery to battery charger – use cases

It’s not possible to use a basic VSR in vehicles with a smart alternator (Euro 5 and above). The same goes for systems with a lithium leisure battery. You will therefore need a battery to battery charger in these instances. We also recommend B2B chargers as they can safely charge your leisure battery to 100% with the ‘absorption’ phase. VSRs don’t have this feature.

For use in dual battery systems in vehicles or on boats, where the (smart) alternator and the starter battery charge the service battery.

You can use the Smart BuckBoost charger for both lead-acid and lithium batteries. This model is 700W, and unlimited units can be connected in parallel to increase output power.

Suitable for high temperatures up to 55°C with a full rated output up to 40°C.

Products that give back

We are members of 1% for the Planet. This means that for every product purchased from Climbingvan, we will give 1% of the total cost to The Honnold Foundation, to provide solar power to underprivileged communities. If you want your electrical system to have more of a positive impact, purchasing your components from us at Climbingvan will mean you can give back as well as powering your off-grid system.

Product SKU: ORI121217040


Additional information

Weight 0.33 kg
Dimensions 13.73 × 12.31 × 4 cm



Output voltage


Current (A)




Smart functionality


Connector type

Screw terminals


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