The Victron Orion-Tr Smart 12/24-10A is a galvanically isolated DC-DC charger that steps a 12V source, typically a vehicle alternator or starter battery, up to a regulated 24V output at up to 10A (240W). It suits dual-battery systems in vehicles, boats and off-grid setups where isolation between source and load matters.

Key features

• Galvanic isolation, transformer isolated between input and output, avoiding ground loops and protecting connected electronics.
• Output, 12V input, 24V regulated output at up to 10A continuous (240W).
• Bluetooth control, configured, monitored and updated via the VictronConnect app, no separate interface cable needed.
• Adaptive charging, supports lithium (LiFePO4) and lead-acid chemistries including AGM, gel and flooded.
• Engine detection, monitors input voltage and only enables output once the alternator is running, protecting the starter battery.
• Programmable profiles, output voltage, absorption and float settings adjustable to match the connected battery.
• Thermal protection, automatic power derating under high temperatures.

Product overview

A high-frequency transformer provides true galvanic isolation between input and output circuits, which matters in marine and vehicle wiring where battery banks share a common chassis ground. Without isolation, charge current can find unintended paths and cause corrosion or interference. This design removes that risk.

All setup runs through VictronConnect over Bluetooth: charge algorithm, absorption voltage, float voltage and current limit are all set from a phone or tablet. Engine detection stops the auxiliary bank from draining the starter battery by checking the alternator is actually running before the output switches on.

At 240W continuous, this unit tops up a secondary 24V bank during transit rather than bulk charging from flat. Larger Orion-Tr Smart models are available where higher charge rates are needed. The enclosure is compact and can be wall or DIN-rail mounted, suiting tight vehicle cabinets or marine panels.

Applications

• Charging a 24V auxiliary or leisure battery from a 12V vehicle alternator or starter battery.
• Marine dual-battery systems needing galvanic isolation against electrolytic corrosion.
• Campervans, motorhomes and commercial vehicles with split 12V/24V systems.
• Off-grid cabins or mobile installations where a 12V source feeds a 24V bank.
• Telecommunications and industrial equipment needing a stable, isolated 24V supply from 12V.

What's in the box

• 1 x Victron Orion-Tr Smart 12/24-10A (240W) Isolated DC-DC Charger

Installation notes

Fit this with correct cable sizing and fusing on both input and output sides, matched to the rated current. Marine installs should follow NMEA or RCD Directive wiring standards. Set the engine detection threshold and charge profile in VictronConnect before commissioning. Only select a lithium profile if the connected battery has a compatible BMS.