Victron Energy - 48V to 12V - Orion-Tr Smart - 48/12-20A - Isolated DC-DC Charger

Victron 48V to 12V Orion-Tr Smart Isolated DC-DC Charger: Intelligent Power Conversion for Dual-Battery Systems

Efficient 48V to 12V DC-DC Charging with Adaptive 3-Stage Algorithm and Bluetooth Control

The Victron Orion-Tr Smart Isolated DC-DC Charger delivers precise, regulated power conversion from a 48V battery bank to a 12V auxiliary system. Designed for vehicles, marine vessels and off-grid installations running a 48V house bank, this charger safely steps down voltage to run or charge 12V equipment while maintaining battery health, using an adaptive 3-stage charge algorithm (Bulk, Absorption, Float) rather than a basic fixed-voltage converter.

With 20A of continuous output current (240W at 40°C, up to 280W at 25°C) and a 25A 10-second surge rating, it handles demanding 12V loads and auxiliary battery charging. The integrated Bluetooth Smart interface allows full configuration and monitoring via the VictronConnect app. This isolated design provides galvanic isolation of 200V DC between input, output and case, protecting sensitive electronics from ground loops - a critical advantage where a 48V system shares a vehicle, vessel or building with 12V electronics.

Smart Alternator Compatibility and Programmable Charge Profiles

The Orion-Tr Smart features an engine-running detection mechanism that stops the converter when the alternator isn't running, preventing unwanted discharge of the input battery - useful in Euro 5/6 vehicles with smart alternators, or any 48V input source that shouldn't be drained when idle. Charge parameters are fully programmable for lead-acid or lithium battery chemistries, and the unit can alternatively be set to a fixed output voltage to run as a 12V power supply. The adjustable output voltage range of 10-15V provides flexibility for sensitive loads or specific battery requirements.

Robust Design for Harsh Australian Conditions

The Orion-Tr Smart carries an IP43 protection rating for its electronic components when installed with the screw terminals facing downward (IP22 at the connection area). It's rated for continuous operation up to 40°C ambient and can operate up to 55°C with output derated by 3% per °C above 40°C. Screw terminals accept cable up to 16mm² (AWG6), and the compact 130 x 186 x 70mm, 1.3kg housing suits tight installation spaces such as under-bonnet, behind panels, or in battery compartments. All models are short-circuit proof and an unlimited number of units can be paralleled to increase output current.

Key Features

• Adaptive 3-stage charge algorithm (Bulk, Absorption, Float), programmable for lead-acid or lithium batteries
• Bluetooth Smart for wireless monitoring, configuration and firmware updates via VictronConnect
• Galvanic isolation (200V DC) between input, output and case
• Engine-running detection prevents input/starter battery drain when the alternator is not running
• Remote on/off terminal for integration with a switch, relay or BMS signal
• Parallel operation supported - unlimited units for higher combined output current
• Wide input voltage range of 32-70V accommodates a 48V system's normal voltage swing
• Short-circuit and over-temperature protection; non-replaceable input fuse

Applications

This charger suits 48V battery bank systems - such as larger off-grid solar installations, telecom sites, or 48V-based vehicles and vessels - that also need to run or charge 12V equipment such as fridges, lighting, winches or communications gear. The isolated design makes it suitable where sensitive 12V communication or navigation electronics share the system with a higher-voltage 48V bank.

Specifications