DC-DC converters and battery chargers

DC-DC converters and battery-to-battery chargers adapt, stabilise or increase a direct-current voltage between 12 V, 24 V and 48 V systems. This category covers solutions for powering equipment and charging leisure batteries in campervans, motorhomes, boats, commercial vehicles and off-grid systems across Europe.

DC-DC converter or battery-to-battery charger?

A DC-DC converter provides a stable output voltage for equipment operating at a different voltage from the source battery. A DC-DC battery charger, also called a B2B charger or charging booster, uses the starter battery and alternator to recharge a leisure battery with a controlled charging profile. Not every converter is a battery charger, so check the operating mode stated on each product page.

How to choose the right model

• Input and output voltage: determine whether the system needs 12/12 V, 12/24 V, 24/12 V, 24/24 V, 24/48 V or another supported combination.
• Current and power: compare continuous amps and watts with the actual load or battery requirements.
• Isolated or non-isolated: galvanic isolation electrically separates input and output; the correct choice depends on the installation design.
• Charging function: for leisure batteries, confirm support for AGM, gel or LiFePO4 and smart-alternator detection where required.
• Installation conditions: check cooling, IP protection, cable size, fusing and available space.

Typical uses

These units can charge a leisure battery while driving, power 12 V equipment from a 24 V system, stabilise voltage in vehicles and isolate sensitive circuits. Depending on availability, the range includes Victron Orion, Orion-Tr, Orion-Tr Smart, Orion XS and IP67 models.

Frequently asked questions

Will a DC-DC charger work with a smart alternator?

Only when the selected model includes compatible detection or control. Check the product specification and the vehicle's charging system before installation.

Can it charge a LiFePO4 battery?

Yes, provided that the charger offers the correct lithium profile and the installation remains within the battery BMS limits.

Explore the Victron Energy range and our wider selection of battery chargers and power supplies. Before ordering, verify voltage, power, isolation, battery chemistry and installation requirements.