Victron Orion-Tr 24/12-15 wiring diagram

The Orion-Tr 24/12-15 non-isolated converts a nominal 24 V supply to a fixed 12.5 V output for 12 V loads. The model specification table gives 18–35 V input, 15 A continuous output, and 20 A maximum output. The maximum figure is not the continuous design rating. This fixed-voltage supply has no documented battery-charge profile; do not use this walkthrough as a house-battery charging scheme.

It is distinct from the isolated adjustable Orion-Tr and from Bluetooth Orion-Tr Smart chargers. The original catalog photograph depicted a 12/12-9 isolated converter and was removed because it did not identify this model.

IN + / IN − represent source positive and negative; OUT + / OUT − represent the regulated load supply. The two physical minus terminals are internally interconnected. There is no galvanic isolation between source and load, and no documented Smart charger setup or engine-detection menu.

Connect the negative supply first. The installation sheet specifically warns that a poor negative connection can cause output overvoltage. Use a sound common-return path sized for the load; do not assume the two negative symbols create isolated systems. The terminal capacity is 6 mm² / AWG 10. No terminal tightening torque is specified in these reviewed sources.

Protect the source-side positive wiring near the supplying battery and provide suitable protection for downstream load branches. Select protection from the actual conductor, connected load, and installation conditions. The installation sheet's 5 A external fuse instruction applies only to the 24/12-5, not this 15 A unit. It does not provide a model-specific external fuse value for the 24/12-15, so that sibling's fuse must not be copied here.

Before connecting valuable loads, verify the 24 V source polarity, the common negative, and the 12.5 V output. Calculate voltage drop in both input and output conductors. Keep sustained demand within 15 A, accounting for starting surges and ambient temperature rather than treating 20 A as a normal operating target.

Choose a cool, dry, ventilated location. IP43 protection applies with screw terminals facing downwards. The specified temperature range is −20 to +55°C, with 3% per °C derating above 40°C. Keep the converter and exposed connections away from spray and battery gases, and verify stable output under the intended load after installation.