Victron Energy Orion-Tr 48/12-30A 360W Isolated DC-DC Converter

High-current 48V to 12V step-down power run serious 12V loads cleanly from any 48V system

The Victron Energy Orion-Tr 48/12-30A (ORI481240110) is a heavy-duty isolated DC-DC step-down converter that delivers clean, regulated 12V power from a 48V source at up to 30A continuous with burst capacity to 40A. Rated at 360W at 40°C and 430W at 25°C, it's engineered for installations where a high-voltage 48V bus needs to supply substantial 12V loads without voltage instability, ground loops, or electrical noise crossing between the two circuits.

Designed as a true worldwide product, the Orion-Tr 48/12-30A suits a wide range of demanding applications: 48V off-grid solar systems powering 12V loads or charging a 12V auxiliary battery, 48V electric vehicles or heavy plant with 12V accessory circuits, and large-scale marine installations with 48V primary systems and 12V navigation or hotel loads. The adjustable output (10–15V) makes it equally effective as a precision 12V battery charger set the correct voltage for your battery chemistry and let it maintain the secondary bank automatically. Like all Orion-Tr isolated models, it handles the sustained heat, vibration, and high-draw conditions that Australian off-grid, commercial, and 4WD applications routinely demand.

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Key Specifications

• Input voltage range: 40–70V DC
• Under voltage shutdown: 28V
• Under voltage restart: 30V
• Nominal output voltage: 12.2V (adjustable 10–15V)
• Continuous output current: 30A at 25°C
• Maximum output current (10s burst): 40A
• Short circuit output current: 60A
• Continuous output power at 40°C: 360W
• Continuous output power at 25°C: 430W
• Efficiency: 87%
• 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: Avoid routing heavy 48V input cabling through a high-current switch. The remote on/off accepts a low-power signal from a cabin switch, BMS charge-enable output, or engine run/stop circuit giving clean, safe control without adding bulky switch gear to high-voltage wiring runs.
• Adjustable output voltage (10–15V): Precisely set the 12V output to match your load or battery charging requirement. Use 14.4V for AGM absorption, 13.6V for float, or tune it to the correct voltage for LiFePO4 making the Orion-Tr a fully capable isolated 12V battery charger driven directly from the 48V bus.
• 30A continuous 40A burst: Serious continuous output for serious 12V loads. At 30A rated and 40A burst, this unit comfortably powers fridges, inverters, lighting rigs, communications equipment, and 12V control systems in parallel without tripping into thermal derating under normal operating conditions.
• Doubles as a 12V battery charger: In 48V off-grid, EV, or commercial vehicle systems with a secondary 12V starter or accessory battery, the Orion-Tr replaces a standalone charger entirely. One compact unit handles both regulated supply and battery charging duties from the 48V bus.
• 200V DC galvanic isolation: Complete electrical separation between the 48V input, 12V output, and chassis eliminates ground loops, suppresses conducted noise across the large voltage step, and protects sensitive 12V electronics from transients generated on the 48V side. Essential wherever 48V and 12V circuits share physical proximity in vehicles, vessels, or plant.
• Unlimited parallel operation: Need more than 30A at 12V? Connect additional ORI481240110 units in parallel no current-sharing hardware or balancing modules required. Each unit contributes its full rated output, with no practical upper limit on the number of paralleled units.
• Short circuit proof output: A fault on the 12V output will not permanently damage the unit. It recovers automatically once the fault is cleared, minimising downtime and replacement costs in remote and commercial installations far from a spare parts shelf.
• Thermal derating not hard shutdown: Output current reduces gradually above 40°C rather than cutting off abruptly. In hot Australian engine bays, sealed battery enclosures, or sun-exposed equipment, the system continues delivering usable power rather than faulting out under sustained load.
• IP43 rated enclosure: Dust and splash protection with terminals oriented downward. Suitable for under-bonnet, underbody, marine, and outdoor enclosure installations where exposure to moisture and particulates is unavoidable.
• Screw terminals, 16mm² capacity: Matches the heavy wiring gauge a 30A+ installation demands. Standard screw terminals no special tools or proprietary connectors fully field-serviceable in the workshop or on the road.
• 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 ensure this is part of your system design before commissioning.

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Technical Specs

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Compatible With

• 48V off-grid solar storage systems with 12V auxiliary loads or secondary battery banks
• 48V electric vehicles and heavy plant with 12V accessory, control, or starter circuits
• 48V marine systems supplying 12V navigation, communications, or hotel loads
• 48V commercial vehicles (buses, coaches, electric fleet) with 12V 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 integration)
• Parallel arrays of additional ORI481240110 units (unlimited parallel operation supported)

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Frequently Asked Questions

Can this unit charge a 12V battery from a 48V solar or off-grid system?

Yes. The adjustable output (10–15V) lets you set the correct charge voltage for your 12V battery chemistry AGM, gel, or LiFePO4 making the Orion-Tr a fully functional isolated battery charger directly from the 48V bus.

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

At 40°C ambient, the ORI481240110 delivers 360W and 30A continuous at 12V. 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.

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 increase the 12V output beyond 30A from a single unit?

Connect additional ORI481240110 units in parallel on both the 48V input and 12V output sides. Victron supports unlimited parallel operation with no current-sharing hardware required each additional unit adds 30A to the 12V output bus.

Does galvanic isolation matter when stepping down from 48V to 12V in the same system?

Yes. The large voltage differential between 48V and 12V circuits increases the risk of transients and noise crossing between them. The 200V DC galvanic isolation eliminates ground loops and protects sensitive 12V electronics from interference generated on the 48V side regardless of whether both circuits share a chassis ground.