The Victron Orion-Tr 24/48-8.5A is a galvanically isolated DC-DC converter that steps up a 24V DC input to a 48V DC output at up to 8.5A, delivering 400W of continuous power. It suits off-grid systems, marine and vehicle installations, and any setup where two DC bus voltages must be bridged without an electrical connection between them.

Key features of this victron dc dc converter

• Galvanic isolation, transformer-based, so input and output share no direct electrical path, avoiding ground loop issues.
• Voltage conversion, 24V input to 48V output at up to 8.5A continuous.
• Power output, 400W continuous, regulated.
• Housing, enclosed metal casing suited to fixed installation in panels, enclosures and vehicle builds.
• Regulated output, protects connected 48V loads and battery banks from fluctuations on the input side.
• System compatibility, works within Victron system architectures, including monitoring via VictronConnect where supported equipment is used.

Product overview

The isolated topology matters when connecting two battery banks of different voltages, integrating a 48V inverter system with a 24V auxiliary supply, or working in marine environments where galvanic corrosion from ground loops is a real concern. The isolation barrier also offers a degree of protection against fault propagation between the two DC systems.

At 400W continuous, it is sized for meaningful loads: charging a 48V battery bank from a 24V source, powering 48V inverters or motor controllers from a 24V house bank, or supplying 48V DC distribution in a mixed-voltage system. The regulated output keeps the 48V side stable regardless of normal fluctuation on the 24V input, which matters when that input is a live battery under charge or discharge.

Applications

• Charging a 48V battery bank from a 24V alternator or battery source in vehicles, boats or off-grid systems.
• Supplying 48V inverters or motor controllers where a 24V primary bus is already established.
• Marine installations requiring galvanic isolation to prevent corrosion from ground loops.
• Off-grid cabins and mobile setups needing two electrically separate battery banks at different voltages.
• Industrial and telecoms enclosures requiring a stable, regulated 48V rail derived from a 24V supply.

What's in the box

• 1x Victron Orion-Tr 24/48-8.5A (400W) Isolated DC-DC Converter

Installation notes

Fit this with input wiring correctly fused close to the source battery, and size cabling for the input current at 24V, which runs significantly higher than the 8.5A output current. The galvanic isolation means the output negative does not need to share a common ground with the input negative, but check your system design before connecting. Marine installations should follow NMEA or flag-state wiring standards as applicable.