DC-DC charger Victron Orion-Tr ORI121222120 12V 18A isolated

The Victron Orion-Tr ORI121222120 12V 18A isolated DC-DC charger converts and stabilizes a vehicle or alternative DC input to charge and maintain a 12V auxiliary battery. Designed for applications where galvanic isolation and a regulated charging source are required, this unit provides a steady 18 A output with internal isolation between input and output circuits. The charger supports reliable battery maintenance in mobile, marine, and off-grid systems and helps protect sensitive electronics by preventing ground loops and interference.

Advantages

This isolated DC-DC charger offers galvanic isolation to separate vehicle main systems from auxiliary battery circuits, reducing the risk of electrical interference and corrosion. The unit provides a regulated charging current of up to 18 A to ensure safe charge levels tailored to 12V battery banks. Compact and purpose-built, it improves battery longevity by supplying stable charge voltage and current regardless of input fluctuations. The product is engineered for continuous operation in mobile and marine environments and includes protections that contribute to operational safety.

Suitable for

• Charging and maintaining 12V auxiliary batteries in cars, vans, and trucks
• Powering 12V battery banks on boats and marine vessels with galvanic isolation
• Off-grid and camper van systems requiring a regulated isolated DC-DC charge source
• Installations where separation between input and output ground is needed to prevent interference

Key specifications

• Input type: DC input compatible with 12V vehicle or alternative DC sources
• Output voltage: regulated 12V output suitable for 12V battery charging
• Output current: nominal 18 A continuous charging current
• Isolation: galvanic isolation between input and output circuits
• Protection features: built-in protection against overload, short circuit and thermal conditions
• Intended environments: mobile, marine and off-grid applications

How to use

Install the charger according to vehicle or system wiring best practices, ensuring correct polarity on input and output connections and secure mounting in a ventilated location. Connect the DC input to the vehicle’s electrical system or alternative DC source and connect the output to the auxiliary 12V battery bank. Verify that the installation maintains the required isolation and that fuses or circuit breakers are fitted as close to the supply as recommended by installers or local regulations. After wiring, power the unit and confirm stable output voltage and charging current appropriate for the battery type.

Usage recommendations

Use the charger with 12V battery chemistries specified by the battery manufacturer and select appropriate fusing on input and output circuits. For marine or corrosive environments, mount the unit in a protected, ventilated location and check connections periodically. When integrating with battery management systems or alternator control, follow component manufacturer guidance to ensure compatible charge profiles and safe operation.