Victron Energy Orion-Tr 24/48-8.5A 400W Isolated DC-DC Converter

Step up from 24V to 48V with full isolation feed your 48V system cleanly from any 24V source

The Victron Energy Orion-Tr 24/48-8.5A (ORI244841110) is a high-power isolated DC-DC step-up converter that bridges a 24V source and a 48V load or battery bank with complete galvanic isolation between them. Rated at 400W continuous at 40°C and 480W at 25°C, it's built for demanding applications where a 24V input system needs to power or charge a 48V output circuit without sharing grounds, introducing noise, or requiring a full system voltage change.

Typical applications include 24V commercial vehicles or solar systems that need to supply a 48V secondary bank, industrial equipment running mixed-voltage architectures, and marine or off-grid installations where 48V loads are fed from a 24V generation or storage source. The adjustable output range of 40–60V gives precise control over the 48V output making it equally useful as a 48V battery charger or a regulated 48V supply. Like all Orion-Tr isolated models, it includes remote on/off, supports unlimited parallel operation, and is built to handle the heat, dust, and sustained loads that Australian conditions routinely produce.

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Key Specifications

• Input voltage range: 20–35V DC
• Under voltage shutdown: 14V
• Under voltage restart: 15V
• Nominal output voltage: 48.2V (adjustable 40–60V)
• Continuous output current: 8.5A at 25°C
• Maximum output current (10s burst): 15A
• Short circuit output current: 25A
• Continuous output power at 40°C: 400W
• Continuous output power at 25°C: 480W
• Efficiency: 89%
• Galvanic isolation: 200V DC between input, output, and case
• Output voltage tolerance: ±0.2V
• Output noise: 2mV rms
• Off-load current draw: less than 120mA
• Operating temperature: −20°C to +55°C (derate 3% per °C above 40°C)
• IP43 protection rating (terminals oriented downwards)
• DC connection: Screw terminals, max cable cross-section 16mm²

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Features & Benefits

• Remote on/off input: Control the converter without routing heavy 24V input wiring through a high-current switch. Wire the remote on/off to a simple cabin toggle, a BMS charge-enable output, or an engine run/stop signal for clean, low-resistance system control.
• Adjustable output voltage (40–60V): Set the 48V output precisely to match your load requirements or battery charging profile. Dial in absorption voltage for AGM or LiFePO4, set a float voltage for long-term maintenance, or tune it for sensitive 48V electronics all without an additional voltage regulator.
• Step-up isolated charging for 48V battery banks: In a 24V system with a secondary 48V battery bank solar storage, electric drive, hotel loads the Orion-Tr handles the step-up and charging duties in one compact unit, eliminating the need for a separate 48V charger and simplifying your overall system design.
• 400W continuous at 40°C 480W at 25°C: High continuous power output makes this unit suitable for sustained 48V loads, not just intermittent charging. At 8.5A continuous with 15A burst capacity, it handles real-world 48V accessory and charging demands in commercial and off-grid environments.
• 200V DC galvanic isolation: Full electrical separation between the 24V input, 48V output, and chassis eliminates ground loops and suppresses conducted noise across the voltage boundary. Critical wherever 24V and 48V circuits operate in physical proximity but must remain electrically independent vehicles, vessels, and industrial plant alike.
• Unlimited parallel operation: Scale output current beyond a single unit by paralleling additional ORI244841110 converters. No current-sharing modules needed each unit contributes its full 8.5A rated output to the 48V bus, with no limit on the number of units that can be paralleled.
• Short circuit proof output: A fault on the 48V output side will not destroy the unit. It recovers automatically once the fault is cleared, keeping downtime minimal in remote or commercial installations.
• Thermal derating not hard shutdown: Output current reduces gradually above 40°C rather than cutting off abruptly. In hot Australian engine bays, enclosed battery cabinets, or sun-baked plant equipment, the system continues to deliver usable power rather than faulting out at the worst possible time.
• IP43 rated enclosure: Dust and splash protection with terminals oriented downward. Suitable for under-bonnet, underbody, and exposed cabinet installations in vehicles and marine applications.
• Screw terminals, 16mm² capacity: Heavy-gauge cable support to match the wiring demands of a high-power 24V input installation. Standard screw terminals no special tools or proprietary connectors required, fully field-serviceable.
• Non-replaceable input fuse included: The 24V input model includes an internal non-replaceable input fuse. This fuse is not user-serviceable; if it opens, the unit requires warranty assessment or replacement. Always install appropriate external overcurrent protection on the 24V input wiring.

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Technical Specs

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Compatible With

• 24V solar storage and off-grid systems with 48V secondary battery banks or loads
• 24V commercial vehicles (trucks, buses, plant) with 48V drive, hotel, or accessory systems
• 24V marine installations supplying 48V navigation, propulsion, or hotel circuits
• Mixed-voltage industrial equipment with 24V supply rails and 48V output requirements
• Victron SmartSolar MPPT charge controllers operating on 24V systems
• Victron BMV battery monitors and Cerbo GX / Venus GX devices (system-level monitoring)
• Victron Lynx distribution busbars and fusing systems (for clean, fused 24V/48V integration)
• Parallel arrays of additional ORI244841110 units (unlimited parallel operation supported)

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Frequently Asked Questions

Can this unit step up from 24V to charge a 48V LiFePO4 battery bank?

Yes. The adjustable output range of 40–60V allows you to set an appropriate charge voltage for 48V LiFePO4 or lead-acid batteries, making the Orion-Tr a fully functional isolated step-up battery charger from a 24V source.

What is the continuous output power at typical Australian operating temperatures?

At 40°C ambient common in Australian engine bays and outdoor enclosures the ORI244841110 delivers 400W continuous. At 25°C it is rated to 480W, with output derating at 3% per °C above 40°C rather than hard shutdown.

Does galvanic isolation matter when both the 24V and 48V circuits are in the same vehicle?

Yes. Even in the same vehicle, galvanic isolation eliminates ground loops, prevents cross-contamination between voltage domains, and protects sensitive 48V electronics from transients and interference generated on the 24V side.

How do I increase output beyond 8.5A at 48V?

Connect additional ORI244841110 units in parallel on both input and output sides. Victron supports unlimited parallel operation with no current-sharing hardware each unit adds 8.5A to the 48V output bus.

What happens if the internal input fuse opens?

The internal input fuse on 24V input models is non-replaceable and not user-serviceable. If it opens, the unit will require warranty assessment or replacement. Always install appropriate external overcurrent protection on the 24V input wiring to minimise this risk.