The Victron Orion-Tr 48/12-9A is a galvanically isolated DC-DC converter that steps a 48V DC input down to a regulated 12V DC output at up to 9A, giving 110W rated power. It suits vehicles, vessels, off-grid systems and industrial installations that need a stable 12V supply from a 48V battery bank or bus, with no electrical connection between the two circuits.

Victron 48V to 12V converter with galvanic isolation

• Isolation, galvanic, transformer-based, so input and output share no common electrical path.
• Input, 48V DC nominal, with a wide input range to handle real-world battery voltage variation.
• Output, 12V DC regulated at up to 9A continuous, 110W rated power.
• Weight, 0.5kg, compact enough for panel mounting in tight spaces.
• Compatibility, designed to sit alongside Victron 48V equipment such as MultiPlus and Quattro units.

Product overview

The Orion-Tr range uses a transformer-based isolated topology. Input and output grounds stay independent, which matters in marine and vehicle work where chassis grounds differ between circuits, and anywhere a fault on the 12V side must not reach the 48V battery bank. That isolation also suits systems running mixed battery chemistries or separate battery banks.

At 110W this unit is sized for 12V control equipment, lighting circuits, communication devices and other auxiliary loads run from a 48V system. It is not a battery-to-battery charger: the output is a fixed regulated voltage rail rather than a charge profile.

Technical specifications

Applications

• Powering 12V auxiliary circuits from a 48V off-grid battery bank.
• Marine installations needing isolated power conversion between separate DC systems.
• Electric and specialist vehicles with a 48V main bus and 12V accessory loads.
• Telecommunications and industrial control panels where galvanic isolation is required.
• Victron 48V system installations needing a stable 12V rail for monitoring or control gear.

What's in the box

• 1x Victron Orion-Tr 48/12-9A (110W) Isolated DC-DC Converter

Installation notes

This unit operates at 48V DC, a hazardous voltage in many jurisdictions, and should be installed by a qualified electrician familiar with DC power systems. Fuse both input and output sides to match the wire gauges used. Because input and output grounds are independent, avoid bonding them during installation, as that would defeat the isolated topology.