The Victron Orion-Tr Smart 12/24-15A is an isolated DC-DC battery-to-battery charger for dual-battery systems in vehicles, boats and off-grid installations. It takes a 12V input from a starter battery or alternator and outputs 24V at up to 15A, giving 360W of charging power with full galvanic isolation between input and output circuits.

Key features of the Orion-Tr Smart DC-DC charger

• Conversion, 12V input to 24V output at 15A continuous, with galvanic isolation to prevent ground loops and protect connected electronics.
• Bluetooth control, built-in Bluetooth works with the VictronConnect app for configuration, monitoring and firmware updates from a smartphone.
• Charge profiles, adaptive charging algorithm with configurable profiles for lithium (LiFePO4), AGM, gel and flooded lead-acid batteries.
• Engine detection, monitors input voltage so the unit only charges when the alternator is running, protecting the starter battery.
• Remote on/off, a two-pin connector allows switching via a vehicle ignition circuit or an external battery management system.
• Isolation type, transformer-based galvanic isolation, so input and output circuits share no common ground.

How it works

Configuration runs entirely through the VictronConnect app over Bluetooth. Installers can set absorption voltage, float voltage, bulk current limits and the engine detection threshold from a phone or tablet, without a separate programming interface. The unit also accepts a two-wire remote on/off input, switchable via an ignition feed, a BMS, or a manual switch.

Because the charger applies its own multi-stage charge curve independently of the alternator, it works correctly even with vehicles using smart, variable-voltage alternators.

Applications

• Charging a 24V lithium or lead-acid service battery from a 12V vehicle alternator or starter battery.
• Marine dual-battery systems where galvanic isolation is needed to prevent corrosion and ground loop issues.
• Motorhomes, campervans and commercial vehicles with split voltage electrical systems.
• Off-grid cabins or mobile installations feeding a 24V load bank from a 12V source.
• Refrigerated transport and specialist vehicle conversions needing isolated DC power distribution.

What's in the box

• 1x Victron Orion-Tr Smart 12/24-15A (360W) Isolated DC-DC Charger

Installation notes

Fit by a qualified electrician or experienced system integrator familiar with DC wiring practice. Cables must be correctly rated for the current draw, with appropriate fusing on both input and output sides close to the battery terminals. Marine installs should follow NMEA or RYA wiring guidance and meet the relevant boat safety scheme requirements. Wire the remote on/off connector to a switched ignition feed or BMS output to stop unintended discharge of the source battery when the engine is off. Do not exceed the specified input voltage range.