Victron's Orion-Tr 12/12-18A is a galvanically isolated DC-DC converter rated at 220W, stepping between 12V sources and 12V loads while keeping input and output electrically separate. It suits marine, vehicle and off-grid systems where two 12V battery banks need to stay independent.

Victron DC-DC converter key features

• Isolation, galvanic, transformer-based, separating input and output circuits.
• Output current, 18A continuous at 12V.
• Output power, 220W.
• Weight, 1.15 kg.
• Design, solid-state with no moving parts.

Why isolation matters

Non-isolated DC-DC converters can let fault currents pass between battery banks and introduce ground loops that interfere with audio, navigation or communication equipment. The Orion-Tr's transformer-based topology keeps the two circuits fully separate, avoiding that shared ground reference altogether.

Applications

• Charging a 12V service battery from a 12V starter battery on boats, motorhomes and campervans.
• Supplying a 12V DC load circuit from a separate battery bank where ground loop prevention matters.
• Off-grid cabins and vehicles with two independently earthed 12V systems.
• Commercial vehicle auxiliary power systems needing regulated 12V output.
• Marine installations where isolation between battery banks is required by wiring standards.

Installation notes

Fit this converter with correctly rated wiring and fusing on both input and output circuits, in a ventilated location away from water ingress. Installation should be carried out by a qualified electrician or experienced marine or vehicle electrical engineer, following the wiring standards relevant to the vessel or vehicle type.

What's included

• 1 x Victron Orion-Tr 12/12-18A (220W) Isolated DC-DC Converter