Victron Orion XS 12/12-70A DC-DC Charge Booster

The Victron Orion XS 12/12-70A is a configurable DC-DC battery charger for high-performance mobile 12-V power systems. It uses the energy supplied by the alternator to charge a separate 12-V service battery while driving with a regulated charging current of up to 70 A to download.

With a continuous output power of up to 1,000 W, the unit is suitable for larger service batteries and applications with high energy requirements. The input and output currents, charging voltages, and protection thresholds can be adjusted to match the alternator, battery, and wiring.

The Main Benefits

• Up to 70 A charging current: enables the rapid charging of high-performance 12-V service batteries.
• Up to 1,000 W output power: for mobile power systems with high charging demands.
• Adjustable input and output current: Adjusts the current draw to match the alternator, battery, and wiring.
• Emergency Start-Up Recharge: charges a discharged starter battery for 15 minutes with up to 35 A from the service battery.
• Adaptive four-stage charging algorithm: Supports lithium, AGM, gel, and wet-cell batteries.
• Up to 98.5% efficiency: reduces conversion losses and heat generation.
• Active Cooling: Two built-in, low-noise fans support continuous power delivery.
• Bluetooth and VictronConnect: for configuration, real-time data, history, diagnostics, and firmware updates.
• VE.Direct and DVCC: enable integration into compatible Victron GX systems.

Controlled charging with up to 70 A

For high-performance alternators

The input and output current is adjustable from 1 to 70 A. This allows the current draw to be adapted to the alternator's capacity, the battery size, and the existing wiring. This limitation is particularly important for lithium batteries, as their low internal resistance can place a heavy load on an alternator without a regulated charge booster.

For conventional and smart alternators

The built-in engine-running detection feature uses the input voltage to determine whether the alternator is supplying power. The Orion XS initiates the charging process only under the configured conditions, thereby preventing unnecessary discharge of the starter battery when the engine is off.

In Euro 6 vehicles, the alternator voltage can fluctuate significantly or drop temporarily while driving. The trigger thresholds and delay times for engine-running detection can therefore be adjusted in VictronConnect to suit the specific vehicle. Alternatively, a suitable external engine-running signal can be used.

Four-stage charging for different battery types

In charger mode, the Orion XS operates through the constant-current, constant-voltage, trickle charge, and storage phases. Eight battery profiles are available as a starting point; the charging parameters can also be customized in VictronConnect. For lead-acid batteries, the adaptive algorithm adjusts the constant-voltage phase based on the previous discharge cycle.

Emergency Start Recharge for the Starter Battery

If the starter battery is too weak to start the engine, the Orion XS can temporarily feed power back from the service battery. The emergency start function is activated via VictronConnect and reverses the normal charging direction during 15 minutes .

This is followed by a five-minute rest period during which no charging occurs, either forward or reverse. This allows the starter battery's voltage to stabilize. The engine can be started as soon as VictronConnect displays the "Battery Ready" status.

The maximum recharge current is 50% of the rated charging current. The Orion XS 12/12-70A can therefore handle up to 35 A. If a lower input or output current limit has been set for normal operation, the lowest configured value applies instead.

Standby Charging as a Future Firmware Feature

An automatic standby or trickle charge for the starter battery from the service battery is not yet available. According to Victron, the emergency start function is the first of several planned recharge functions. A standby charge is expected to be added via a future firmware update.

Suitable Applications

The Victron Orion XS 12/12-70A is suitable for mobile applications with high charging demands, provided that the alternator, wiring, and service battery are rated for the selected charging current:

• RV, campervans, and expedition vehicles with large service batteries
• Boats and yachts with a 12-volt dual-battery system and a protected installation location
• Service, Utility, and Commercial Vehicles
• Mobile Workshops and Food Trucks
• 12-volt electrical systems with high-performance lithium, AGM, gel, or wet-cell service batteries

Active cooling and IP20 protection rating

The Orion XS 12/12-70A uses two low-noise fans integrated into the base plate. This active cooling supports the high continuous output power. The air intakes on the underside must not be blocked by the mounting surface, cables, or other components.

The general protection rating of the device is IP20. The internal power electronics are enclosed to IP65 standards; however, the unit as a whole is not waterproof due to the fans. It must be installed in a dry, protected, and adequately ventilated environment.

VictronConnect, VE.Direct and system integration

Local Configuration via Bluetooth

The charger connects directly to the VictronConnect app via built-in Bluetooth. There, you can configure settings such as the charging profile, current limit, engine run detection, undervoltage protection, and low-temperature shutdown, among others. Operating data, alerts, history, and firmware updates are also available.

Integration into a GX system

The VE.Direct-Anschluss Enables a wired connection to a compatible GX device. With an internet-enabled GX system, operating data can be monitored remotely via the VRM portal. DVCC also allows system-wide setting of charging voltage and charging current, provided that the firmware, cabling, and system configuration meet Victron’s requirements.

About VE.Smart Through networking, the Orion XS can wirelessly receive voltage, temperature, and current readings from compatible Victron devices. Synchronized charging of multiple chargers is controlled via VE.Smart Networking is not supported for this product.

Installation and Electrical Design

The unit must be mounted on a level, non-flammable surface. The orientation does not matter. There must be sufficient clearance between the mounting surface and the fan air intake. Victron recommends at least 10 cm of space around the unit for cooling.

For the 70-A model, the manual specifies an external battery protection fuse rated at 80 to 100 A and, for cable lengths under 10 m, a minimum cross-sectional area of 25 mm² or 4 AWG. The final design must take into account cable length, installation method, ambient temperature, voltage drop, and local regulations.

Technical Specifications

What's Included

• 1 × Victron Orion XS 12/12-70A DC-DC Battery Charger
• 1 × Terminal block for remote on/off control

Conclusion

The Victron Orion XS 12/12-70A combines up to 70 A of charging current with compact dimensions, high efficiency, and comprehensive configuration options. The emergency start recharge feature provides additional support when the starter battery is discharged. The unit is suitable for high-performance 12-V dual-battery systems, provided that the alternator, wiring, fuses, and cooling system are designed to handle the high charging current.

Frequently Asked Questions About the Victron Orion XS 12/12-70A

• Is the Orion XS 12/12-70A suitable for Euro 6 vehicles?

  
  

  Yes. The engine-running detection feature is designed for both conventional and smart alternators. Since Euro 6 vehicles have different voltage waveforms, the detection thresholds can be adjusted in VictronConnect or supplemented with a suitable external engine-running signal.

• Can any alternator deliver a charging current of 70 A?

  
  

  No. The available power depends on the alternator, engine speed, vehicle loads, temperature, and wiring. The input current must be limited in VictronConnect to a value that the vehicle can sustain over the long term.

• Can the Orion XS charge a LiFePO4 battery?

  
  

  Yes. The charger supports lithium batteries and offers both preconfigured and customizable charging profiles. Charging voltages, current limiting, low-temperature shutdown, and any BMS control must be compatible with the battery being used.

• How does emergency start-up recharging work?

  
  

  This feature charges a weak starter battery from the service battery for 15 minutes. The charging current is up to 50% of the rated charging current, which means a maximum of 35 A for the Orion XS 12/12-70A. This is followed by a five-minute wait before attempting to start the system. Firmware version 1.15 or higher and VictronConnect are required v6.43.

• Does the emergency start function guarantee that the engine will restart?

  
  

  No. This feature supplies power to the starter battery for a limited period of time. Whether the battery will then provide enough power to start the engine depends on its state of charge, capacity, and technical condition. A defective or worn-out battery cannot be repaired this way.

• Can the Orion XS keep the starter battery on standby indefinitely?

  
  

  Not yet. Automatic standby or trickle charging of the starter battery is planned as a future firmware feature, but is not currently available. Until the official release, only the manually initiated, time-limited emergency start recharge is available.

• Is the Orion XS 12/12-70A waterproof?

  
  

  No. The entire unit has a protection rating of IP20 and must be installed in a dry and protected location. The internal power electronics are enclosed to IP65 standards; however, the integrated fans do not make the entire unit waterproof.

• Does the device always deliver 70 A or 1,000 W?

  
  

  No. The actual charge current that can be achieved depends on the current limit, the battery voltages, the alternator output, the voltage drop in the wiring, and the cooling. The rated power of 1,000 W refers to typical conditions of 14.3 V at 70 A and a sufficiently cooled installation.

• Are any additional accessories required for remote monitoring?

  
  

  Thanks to built-in Bluetooth, no additional communication accessories are needed for a local connection to VictronConnect. For monitoring via the GX Remote Console or the VRM portal, you'll need a compatible GX device, a VE.Direct-Verbindung and VRM requires Internet access.

• Can multiple Orion XS units be operated in parallel?

  
  

  Yes, multiple units can be connected in parallel to increase the available output current. The wiring, fuses, alternator capacity, and cooling system must be rated for the total charging current. In the event of an emergency start-recharge, the function must be activated on all units operating in parallel, or the remaining units must be turned off.

• Are cables and fuses included in the package?

  
  

  The manufacturer's manual lists only the Orion XS and the terminal block for the remote control as included in the package. Power cables, battery fuses, and any VE.Direct-Kabel must be selected separately to match the installation.