The Victron Orion-Tr 24/12-20 is a non-isolated DC-DC converter that steps a 24V supply down to a regulated 12V output, delivering up to 20A continuous for a maximum of 240W. It suits mobile, marine and off-grid setups where two different DC voltage systems need to run from one battery bank.

Key features

• Conversion, 24V input to 12V output at up to 20A continuous, 240W maximum.
• Isolation, non-isolated design, sharing a common ground between input and output.
• Adjustable output, output voltage can be fine-tuned to suit the connected load.
• Weight, 0.26kg, compact enough for tight vehicle, vessel or enclosure spaces.
• Footprint, matches other Orion-Tr units, useful when installing several together.
• Protection, guarded against short circuit, over-temperature and over-voltage.

Product overview

The Orion-Tr range uses a synchronous buck converter topology for efficient DC voltage step-down. Being non-isolated, input and output share a common ground, which is fine for most single-vehicle or single-vessel wiring. Where galvanic isolation is needed, such as separate battery banks on a boat with shore power, the isolated Orion-Tr variant is the correct choice instead.

At 240W this unit powers 12V accessories, lighting circuits, control gear or secondary loads from a 24V house or traction battery. The adjustable output lets you compensate for cable voltage drop or match sensitive 12V equipment. No external controller is needed; once wired and set it runs on its own. It shares its form factor with the rest of the Orion-Tr family, so adding units in parallel or moving to a higher-rated model later does not mean redesigning the installation.

Applications

• 12V accessory circuits on a 24V vehicle or truck electrical system.
• 12V control or lighting loads fed from a 24V off-grid battery bank.
• Marine setups where 24V house batteries need to supply 12V navigation or cabin equipment.
• Motorhome and campervan conversions running mixed 24V and 12V loads.
• Telecom and industrial enclosures needing a stepped-down 12V auxiliary rail.

Installation notes

Input and output share a common ground on this non-isolated unit, so check this suits your system before fitting, particularly on marine or multi-source DC setups where ground loops can cause problems. Fuse the input wiring close to the source battery to match the cable rating. Output voltage is set via the onboard trimmer. Fitting should be done by an installer familiar with 12/24V DC systems and mobile or marine wiring standards.

What's in the box

• 1x Victron Orion-Tr 24/12-20 (240W) non-isolated DC-DC converter