The Victron Orion-Tr Smart 24/48-8.5A is a galvanically isolated DC-DC charger that steps a 24V supply up to 48V, delivering up to 8.5A (400W). It suits dual-battery and multi-voltage systems where electrical isolation between circuits is required.

Key features

• Galvanic isolation, transformer-based isolation between input and output, avoiding ground loop issues in dual-bus systems.
• Bluetooth control, built-in Bluetooth for configuration, monitoring and firmware updates via VictronConnect.
• Adjustable input thresholds, input voltage lockout points can be set to protect the source battery.
• Adaptive charging, supports lithium (LiFePO4), AGM, gel and flooded battery chemistries on the output.
• Engine detection, stops the charger drawing down the starter battery when the alternator is off.
• 400W continuous output, 8.5A at 48V, in a compact wall-mountable enclosure.

Product overview

Keeping the input and output circuits electrically separate matters in vehicles, vessels and off-grid systems that share a chassis ground. Without isolation, a direct DC-DC converter can open unwanted current paths that lead to corrosion, interference or safety issues. The isolation transformer in this unit removes that risk.

Configuration runs through the VictronConnect app over Bluetooth, with no extra interface hardware or dongles needed. Installers can set the input lockout voltage, choose the charge profile for the output battery chemistry and watch current, voltage and charge state in real time.

At 400W continuous, it fits 24V-to-48V step-up jobs: electric vehicles, marine dual-bank systems, and off-grid setups feeding a 48V load or battery from a 24V source. The 8.5A output is fixed by the converter design, so check it against the charge acceptance rate of the target battery bank.

Applications

• Charging a 48V service battery from a 24V alternator or starter bank in commercial vehicles.
• Marine dual-bank systems needing isolation to prevent stray current corrosion.
• Off-grid installations stepping a 24V source up to a 48V battery or load bus.
• Electric vehicle auxiliary systems needing isolated voltage conversion.
• Telecom and industrial DC systems with mixed 24V and 48V rails.

What's in the box

• Orion-Tr Smart 24/48-8.5A Isolated DC-DC Charger (ORI244840120)

Installation notes

Fit this with a qualified electrician or system integrator familiar with DC power systems. Wiring must be rated for the continuous current draw, and the source battery bank must sustain the load without dropping below the configured lockout voltage. Marine installs should follow NMEA and flag-state wiring standards. Set battery chemistry and voltage thresholds in VictronConnect before commissioning.