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Battery chargers

A battery charger converts incoming AC power from shore or a generator into the correct DC voltage to safely charge your onboard batteries. Modern marine chargers automatically adjust the charging current and voltage based on battery type — whether AGM, Gel, or Lithium — preventing overcharging and extending battery life. Many models offer multi-stage charging, temperature compensation, and even smart monitoring through digital interfaces for optimal energy management.

Choose a Victron or Mastervolt charger for reliable performance, long lifespan, and maximum efficiency, ensuring your onboard power system is always ready when you need it most. Designed specifically for use at sea, these chargers ensure your batteries stay fully charged, protected, and ready for every voyage.

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Why are battery chargers important on a boat?

A battery charger is an electrical device that converts AC power (from shore power or a generator) into DC power suitable for charging onboard batteries. It regulates voltage and current to match the battery type and charging stage.

Battery chargers are essential because they:

  • Keep batteries fully charged when connected to shore power
  • Prevent overcharging and battery damage
  • Extend battery lifespan
  • Ensure reliable onboard power

Without a proper charger, batteries can degrade quickly or fail unexpectedly.

What specifications should I look at?

Key specifications include:

  • Input voltage (usually 230V AC)
  • Output voltage (12V or 24V DC)
  • Charging current (A): determines how fast batteries are charged
  • Supported battery types
  • Protection features: overheating, waterproofing, short-circuit, reverse polarity

What are the different Victron battery charger series?

Victron offers several battery charger ranges, each designed for specific use cases, system sizes and installation environments.

Victron Blue Smart Chargers

  • Compact, modern chargers with built-in Bluetooth
  • Suitable for small to medium battery banks
  • Support AGM, Gel, Lead-acid and Lithium batteries
  • Bluetooth monitoring and configuration via smartphone or tablet
  • Ideal for recreational boats and simpler installations

Victron Phoenix Chargers

  • Robust, high-quality chargers for permanent onboard installation
  • Reliable multi-stage charging
  • Suitable for continuous use
  • No built-in display, focus on durability and performance
  • Often used in standard marine electrical systems

Victron Centaur Chargers

  • Heavy-duty chargers designed for larger battery capacities
  • High charging current
  • Aluminum housing for improved cooling
  • Multiple battery outputs
  • Suitable for professional or intensive use

Victron Skylla Chargers

  • Advanced, professional-grade battery chargers
  • Designed for large battery banks and commercial vessels
  • High efficiency and reliability
  • Multiple outputs and advanced charging profiles
  • Suitable for demanding marine and industrial environments