Victron Orion-Tr Smart 48/12-20A Isolated DC-DC Charger | ORI481224120

The Victron Orion-Tr Smart 48/12-20A is a galvanically isolated DC-DC charger that steps a 48V source down to charge a 12V service battery. It suits installers working on vehicles, vessels, off-grid systems and industrial setups where the two battery banks need to stay electrically isolated. Bluetooth and VictronConnect are built in, so configuration and monitoring need no extra hardware.

Key features of this dc to dc battery charger

• Input/output, 48V input to 12V output, rated 20A continuous (240W).
• Galvanic isolation, a high-frequency transformer separates input and output, avoiding ground loops and protecting electronics on either bank.
• Smart charge profile, adaptive 4-stage algorithm covering bulk, absorption, float and storage.
• Bluetooth monitoring, configure and monitor in real time via the VictronConnect app on iOS and Android.
• Remote on/off, can be switched by an ignition signal or a battery management system.
• Engine detection, watches input voltage to stop excessive discharge of the starter battery.

Product overview

The high-frequency transformer inside provides full galvanic isolation between input and output circuits, which matters in dual-battery vehicle and marine installs, where a direct connection between banks can cause ground faults or stray-current corrosion. The same isolation lets the unit step down voltage across systems with separate earthing arrangements.

Charge parameters are fully configurable in VictronConnect, covering lead-acid (AGM, gel, flooded) and lithium (LiFePO4) chemistries. Paired with a Victron BMS, the unit can take charge enable/disable signals directly, so it works within managed lithium systems. Multiple units can be run in parallel and synchronised over Bluetooth for higher combined output current, which avoids stepping up to a larger single unit when only a modest increase in capacity is needed.

Applications

Used to charge a 12V leisure or service battery from a 48V house bank in larger motorhomes, coaches and specialist vehicles. Also fitted in marine dual-battery systems needing galvanic isolation, off-grid cabins and industrial sites with a 48V DC bus feeding ancillary 12V loads, and telecom or industrial enclosures needing a stepped-down isolated 12V supply. Works within lithium systems managed by a Victron BMS where remote charge control is required.

What's in the box

• 1x Victron Orion-Tr Smart 48/12-20A (240W) Isolated DC-DC Charger

Installation notes

Fitting should be done by a qualified electrician or experienced system integrator familiar with DC power systems. Fuse both input and output cables to match wire gauge and rated current. Connect the remote on/off terminal to an ignition-switched signal or BMS charge enable output where engine detection alone isn't enough. Marine installs should follow NMEA and flag-state wiring standards. Not intended for grid-connected AC applications.