Victron Energy Orion-Tr 48/24-16A 380W Isolated DC-DC Converter

Reliable isolated 48V to 24V conversion power your 24V loads and batteries cleanly from any 48V system

The Victron Energy Orion-Tr 48/24-16A (ORI482441110) is a professional-grade isolated DC-DC step-down converter that delivers a regulated 24V output from a 48V input at up to 16A continuous with burst capacity to 25A. Rated at 380W at 40°C and 430W at 25°C, it bridges the gap between high-voltage 48V systems and the 24V loads, accessories, and battery banks that many vehicles, vessels, and off-grid installations still depend on.

Typical applications include 48V solar and off-grid storage systems powering 24V loads or maintaining a secondary 24V battery bank, 48V commercial or electric vehicles with 24V accessory circuits, and marine installations running a 48V primary bus alongside 24V navigation or communications equipment. The adjustable output range of 20–30V gives precise control over the 24V output making it equally effective as a 24V battery charger or a regulated supply for sensitive 24V electronics. Like all Orion-Tr isolated models, it handles sustained loads, high ambient temperatures, and the vibration and dust conditions encountered daily in Australian commercial, off-grid, and 4WD applications.

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Key Specifications

• Input voltage range: 40–70V DC
• Under voltage shutdown: 28V
• Under voltage restart: 30V
• Nominal output voltage: 24.2V (adjustable 20–30V)
• Continuous output current: 16A at 25°C
• Maximum output current (10s burst): 25A
• Short circuit output current: 40A
• Continuous output power at 40°C: 380W
• Continuous output power at 25°C: 430W
• 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 80mA
• 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: Keep high-voltage 48V input wiring simple and safe. The remote on/off accepts a low-power signal from a cabin switch, BMS charge-enable output, or engine run/stop circuit eliminating the need for a bulky high-current switch in the 48V input run.
• Adjustable output voltage (20–30V): Fine-tune the 24V output to match your exact load or battery charging requirement. Set 28.8V for AGM absorption, 27.6V for float, or dial in the correct voltage for 24V LiFePO4 giving you a fully flexible isolated 24V battery charger and regulated supply in one unit.
• 16A continuous 25A burst: Sufficient continuous output for demanding 24V loads including communications gear, lighting systems, control electronics, and secondary 24V battery charging. The 25A burst capacity handles transient inrush from motors and inverters without tripping the unit.
• Doubles as a 24V battery charger: In 48V systems with a secondary 24V starter, accessory, or house battery, the Orion-Tr eliminates the need for a dedicated 24V charger. One unit handles both regulated supply and battery maintenance duties from the 48V bus simplifying system design and reducing component count.
• 200V DC galvanic isolation: Full electrical separation between the 48V input, 24V output, and chassis eliminates ground loops, suppresses conducted noise across the voltage step, and protects sensitive 24V equipment from transients originating on the 48V side. Essential wherever 48V and 24V circuits share physical proximity in vehicles, vessels, or fixed plant.
• Unlimited parallel operation: Need more than 16A at 24V? Stack additional ORI482441110 units in parallel no current-sharing hardware required. Each unit contributes its full rated 16A to the 24V output bus, with no limit on the number of paralleled units.
• Short circuit proof output: An output fault won't permanently damage the unit. It recovers automatically once the fault clears minimising downtime and replacement costs in remote installations where getting a replacement unit quickly isn't always an option.
• Thermal derating not hard shutdown: Output current reduces gradually above 40°C rather than cutting off abruptly. In a hot Australian engine bay, sealed equipment enclosure, or sun-baked rooftop cabinet, the system continues delivering usable power rather than faulting out under sustained load in the heat.
• IP43 rated enclosure: Dust and splash protection with terminals oriented downward. Suitable for under-bonnet, underbody, marine, and outdoor enclosure installations where daily exposure to moisture and particulates is expected.
• Screw terminals 16mm² capacity: Matches the wiring gauge requirements of a 16A+ 48V installation. Standard screw terminals with no special tools or proprietary connectors required fast to install and fully serviceable in the field.
• No internal input fuse (48V input model): The 48V input variant does not include an internal replaceable fuse. An appropriately rated external fuse or circuit breaker must be installed on the 48V input wiring per Victron's installation guidelines before commissioning.

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Technical Specs

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Compatible With

• 48V off-grid solar storage systems with 24V auxiliary loads or secondary battery banks
• 48V electric vehicles and heavy plant with 24V accessory or control circuits
• 48V marine systems supplying 24V navigation, communications, or hotel loads
• 48V commercial vehicles (buses, coaches, electric fleet) with 24V accessory requirements
• Victron SmartSolar MPPT charge controllers operating on 48V systems
• Victron BMV battery monitors and Cerbo GX / Venus GX devices (system-level monitoring)
• Victron Lynx distribution busbars and fusing systems (for clean, fused 48V/24V integration)
• Parallel arrays of additional ORI482441110 units (unlimited parallel operation supported)

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Frequently Asked Questions

Can this unit charge a 24V battery bank from a 48V solar or off-grid system?

Yes. The adjustable output (20–30V) lets you set the correct charge voltage for your 24V battery chemistry AGM, gel, or LiFePO4 making the Orion-Tr a fully functional isolated 24V battery charger driven directly from the 48V bus.

What continuous output power does this unit deliver at typical Australian operating temperatures?

At 40°C ambient the ORI482441110 delivers 380W and 16A continuous at 24V. At 25°C it is rated to 430W, with output derating at 3% per °C above 40°C reducing gradually rather than cutting off abruptly under sustained heat.

Is an external fuse required on the 48V input side?

Yes. The 48V input model does not include an internal replaceable fuse. An appropriately rated external fuse or circuit breaker must be fitted to the 48V input wiring per Victron Energy's installation guidelines before the unit is commissioned.

How do I get more than 16A output at 24V from this unit?

Connect additional ORI482441110 units in parallel on both the 48V input and 24V output sides. Victron supports unlimited parallel operation with no current-sharing hardware each additional unit adds 16A to the 24V output bus.

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

Yes. Even within the same installation, the 200V DC galvanic isolation eliminates ground loops, prevents transients and noise from crossing the voltage boundary, and protects sensitive 24V electronics from interference generated on the 48V side regardless of shared chassis grounds.