Victron Energy
Victron Orion XS 12/12-50A DC-DC Battery Charger (Bluetooth)
Victron Orion XS 12/12-50A DC-DC Battery Charger (Bluetooth)
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High-Power 50A Charging in an Ultra-Compact Package
The Victron Orion XS 12/12-50A is a compact, fully configurable DC-DC battery charger designed to charge a 12V auxiliary battery from a 12V starter battery and alternator. Delivering up to 50A and approximately 700W of charging power, it provides fast, controlled charging for lithium and lead-acid house batteries in RVs, boats, work vehicles and other dual-battery systems.
Built-in Bluetooth provides direct access through the VictronConnect app, where charging current, battery profiles, engine-running detection and input-voltage limits can be configured. Its adjustable input-current limit helps protect the alternator, while automatic buck-boost regulation maintains controlled charging as vehicle voltage changes.
- Up to 50A of controlled charging for faster replenishment of your house battery while driving
- Emergency reverse charging can send power back to a depleted starter battery
- Adjustable input and output current from 1A to 50A
- Works with all alternators, including smart
- Built-in Bluetooth setup and monitoring through VictronConnect
- Up to 98.5% efficiency in an exceptionally compact design
- Presets for lithium, AGM and other lead-acid battery types
The new Orion XS 70A delivers up to 40% more charging current than the original 50A model without moving to a larger, bulkier charger. With approximately 1000W available, it is a strong choice for larger lithium banks, high-demand RVs, boats and professional vehicles.
A 50A charging setting creates a substantial continuous load on the vehicle’s alternator. Use VictronConnect to limit the Orion XS input current to a level the alternator, vehicle wiring and operating conditions can safely support. The charger does not need to be operated at its full 50A rating.
Connecting a low-resistance lithium battery directly to an alternator can result in excessive and uncontrolled current. The Orion XS regulates the charging process, helping protect the alternator while providing the auxiliary battery with an appropriate multi-stage charging profile.
Both the input-current limit and maximum charging current can be adjusted in 0.1A increments. This allows the charger to be matched to the alternator’s available capacity instead of forcing every installation to operate at the full 50A output.
Modern ECU-controlled alternators may reduce their output voltage to improve fuel economy. This can prevent a conventional battery isolator or voltage-sensitive relay from properly charging the auxiliary battery.
The Orion XS uses configurable engine-running detection and input-voltage lockout settings to identify when charging power is available. It can automatically begin charging when the engine is running and stop before the starter battery is excessively discharged.
Connect directly to the Orion XS using the free VictronConnect app on a compatible phone or tablet. Bluetooth makes initial setup, monitoring and future adjustments accessible without requiring a separate interface cable.
- Select a factory battery preset or create a custom charging profile
- Adjust input and output current limits
- Configure engine-running detection and input-voltage lockout
- Monitor input voltage, output voltage, current and charging status
- Review charging history, warnings and diagnostic information
- Install firmware updates and protect settings from unwanted changes
The Orion XS uses a configurable four-stage charging process consisting of bulk, absorption, float and storage. Eight factory presets are available for common lithium and lead-acid batteries, and experienced users can create a custom charging profile when required.
Low-temperature charging shutdown can be configured for lithium batteries. This feature requires suitable battery-temperature information, such as data shared through a compatible VE.Smart Network. Batteries with their own low-temperature BMS protection can also stop charging internally when required.
Through VE.Smart Networking, the Orion XS can receive battery voltage, temperature or current information from compatible Victron equipment such as a SmartShunt, BMV battery monitor or Smart Battery Sense. This helps compensate for cable voltage drop and improves charging accuracy.
The integrated VE.Direct port can connect the Orion XS to a compatible Cerbo GX or other Victron GX communication centre. This allows local GX monitoring and remote access through the Victron VRM portal when the system has an internet connection.
The Orion XS also supports compatible DVCC control through a GX device. This allows a supported managed-battery system to coordinate charging voltage and current through the wider Victron system.
In addition to battery-charger mode, the Orion XS can operate as an adjustable DC power supply. Its output can be set from 10V to 17V and remains regulated as the input voltage or connected load changes within the product’s operating limits.
Power-supply mode can be useful for sensitive 12V electronics, stabilizing voltage over long cable runs or supplying equipment that requires a controlled DC voltage rather than a multi-stage battery-charging profile.
High charging current requires properly sized copper conductors, short cable runs and secure terminations. Victron specifies the following recommendations:
| Installation Component | Victron Recommendation |
|---|---|
| Minimum Cable Size — Under 5m | 16mm² / 6 AWG copper |
| Minimum Cable Size — 5m to 10m | 21.2mm² / 4 AWG copper |
| External Battery Protection Fuse | 60A to 70A |
| Maximum Terminal Capacity | 25mm² / 4 AWG |
| 4 AWG Terminal Torque | 5.6Nm / 50 in-lb |
Install appropriately rated DC overcurrent protection close to the positive terminal of each battery. Final cable and fuse sizing must consider circuit length, installation method, ambient temperature, alternator capacity and applicable electrical requirements.
The Orion XS 50A uses Victron’s integrated TORK-KRIMP® screw-terminal system. It accepts stranded or fine-strand copper conductors, with or without suitable bootlace ferrules.
The Orion XS 50A is completely fanless. Its efficient design dissipates heat through natural convection, eliminating fan noise and moving parts while maintaining its full rated output at ambient temperatures up to 40°C when properly installed. Above 40°C, available output is reduced by approximately 1.5% per degree Celsius.
The IP65 enclosure is dust-tight and protected against water jets, making it well suited to demanding vehicle and marine installations. It should still be mounted vertically in a ventilated location, away from direct battery gases and sources of excessive heat. Victron recommends approximately 10cm of open space around the unit for optimum cooling.
- RV and motorhome auxiliary battery charging
- Camper vans and school bus conversions
- Boats and marine house-battery systems
- Service trucks and mobile workshops
- Security and communications vehicles
- High-capacity 12V lithium battery banks
- Vehicles equipped with smart alternators
- Regulated 12V DC power-supply applications
- 12V input and 12V output
- Up to 50A charging current
- Ability to reverse direction and emergency charge a starting battery
- Approximately 700W output at a typical 14V charging voltage
- Adjustable input and output current from 1A to 50A
- Automatic buck-boost voltage regulation
- Built-in Bluetooth Smart
- VictronConnect setup, monitoring and firmware updates
- Integrated smart-alternator and engine-running detection
- Four-stage adaptive battery charging
- Eight pre-programmed battery profiles
- Custom lithium and lead-acid charging settings
- Configurable low-temperature charging shutdown
- VE.Smart Networking support
- VE.Direct port with compatible DVCC support
- Remote on/off and BMS control connection
- Adjustable DC power-supply mode
- Parallel operation for additional charging capacity
- Overload, short-circuit and over-temperature protection
| Specification | Value |
|---|---|
| Model | Orion XS 12/12-50A |
| Victron Part Number | ORI121217050 |
| Type | Non-isolated DC-DC battery charger / power supply |
| Emergency Charging | Yes — emergency reverse charging up to 25A |
| Input Voltage Range | 9V to 17V DC |
| Output Voltage Range | 10V to 17V DC, adjustable |
| Output Voltage Tolerance | ±0.25% maximum |
| Input and Output Current Range | 1A to 50A, adjustable |
| Maximum Continuous Output Power | 700W at a typical 14V charging voltage and up to 40°C with adequate cooling |
| Maximum Efficiency | 98.5% |
| No-Load Consumption | Less than 100mA |
| Standby Consumption | Less than 1.5mA |
| Charge Algorithm | Configurable four-stage charging Bulk / Absorption / Float / Storage |
| Compatible Battery Types | LiFePO₄, AGM, gel and flooded lead-acid with appropriate settings |
| Bluetooth | Built-in Bluetooth Smart |
| Communication | VictronConnect VE.Smart Networking VE.Direct with compatible DVCC support |
| Remote On/Off | Yes |
| Power Supply Mode | Yes |
| Parallel Operation | Yes |
| Cooling | Fanless natural convection |
| DC Connections | Screw terminals with integrated TORK-KRIMP® technology |
| Maximum Cable Size | 25mm² / 4 AWG |
| Recommended External Fuse | 60A to 70A |
| Operating Temperature | -20°C to +60°C Approximately 1.5% output derating per °C above 40°C |
| Protection Rating | IP65 |
| Dimensions | 137.3 × 123.1 × 40mm (5.4 × 4.85 × 1.6in) |
| Weight | 0.330kg (0.73lb) |
| Automotive Compliance | ECE R10-6 |
| Warranty | 5 years — Victron Energy standard warranty |
Specifications are believed to be accurate at the time of publication but may change without notice. While we make every effort to keep product information current, Sapphire Energy cannot guarantee all specifications are complete, error-free or up to date. Please refer to the manufacturer’s documentation if a particular specification is critical to your application. Contact us for help.
Can the Orion XS charge my starter battery in an emergency?
Yes. The Orion XS now supports emergency reverse charging, allowing it to send power from your auxiliary battery back to a depleted starter battery. If a light, accessory or long storage period leaves the starter battery too low to crank the engine, the energy already stored in your house battery may help get you moving again.
The process is started through the VictronConnect app. The Orion XS supplies up to 25A to the starter battery for 15 minutes, then allows a 5-minute settling period before the app displays Battery ready. It provides a convenient backup option without needing to disconnect batteries, move cables or carry a separate battery charger.
Emergency reverse charging requires Orion XS firmware v1.15 or later and VictronConnect v6.43 or later. It is designed to restore enough energy to a healthy but discharged starter battery for an engine-start attempt; it is not a direct jump-start and cannot recover a damaged or worn-out battery.
What does 12/12-50A mean?
The first 12 refers to the nominal input voltage, the second 12 refers to the nominal output voltage and 50A is the maximum charging current.
This model is intended to charge a 12V auxiliary battery from a 12V starter battery and alternator. It does not convert a 12V system into a 24V system.
Will it always draw 50A from my alternator?
No. The input-current limit and maximum charging current can be adjusted from 1A to 50A through VictronConnect. The actual current also depends on battery condition, voltage, temperature and available alternator power.
For installations where the alternator cannot safely provide the full output, reduce the input-current limit to an appropriate level.
How large should my alternator be?
The alternator must have enough unused capacity to support the Orion XS in addition to the vehicle’s existing electrical loads. Alternator nameplate output alone does not indicate how much capacity remains available at idle, in hot conditions or while other equipment is operating.
If the alternator’s continuous spare capacity is uncertain, start with a lower input-current limit and confirm alternator temperature and charging performance under real operating conditions.
Does it work with smart alternators?
Yes. The Orion XS is designed for conventional and ECU-controlled smart alternators. Its configurable engine-running detection allows it to operate even when alternator voltage varies during normal vehicle operation.
Engine-detection thresholds may need to be adjusted for some vehicles, particularly those using Euro 5 or Euro 6 charging strategies.
Can it charge a lithium battery?
Yes. The Orion XS includes charging profiles for compatible LiFePO₄ batteries and allows custom charging voltages and current limits through VictronConnect.
Use the settings recommended by the battery manufacturer. Any required low-temperature charging protection must be provided by the battery’s BMS or by a correctly configured external temperature-sensing system.
Is this an isolated DC-DC charger?
No. The Orion XS 12/12-50A is non-isolated and uses a common negative connection. It is well suited to negative-ground vehicle and marine systems where the starter and auxiliary batteries share a common chassis or negative bus.
If galvanic isolation is required, a different isolated DC-DC charger must be selected.
What cable and fuse size should I use?
Victron recommends 16mm² or 6 AWG copper cable for runs under 5 metres and 21.2mm² or 4 AWG for runs from 5 to 10 metres. Recommended external battery protection is 60A to 70A.
Install suitable overcurrent protection close to the positive terminal of both the starter and auxiliary batteries. Final cable and fuse selection must account for circuit length, installation method, temperature and applicable electrical requirements.
Is the Orion XS 50A waterproof?
The Orion XS 50A carries an IP65 rating, meaning it is dust-tight and protected against water jets. This makes it a strong choice for demanding RV, vehicle and marine installations where occasional moisture may be present.
IP65 does not mean the charger can be submerged. Install it vertically in a ventilated location, keep the terminals properly covered and avoid locations exposed to standing water, direct battery gases or excessive engine heat.
Does it use a cooling fan?
No. The Orion XS 50A is fanless and dissipates heat through natural convection, providing completely silent operation with no fan or other cooling-related moving parts.
Victron recommends approximately 10cm of open space around the charger for optimum cooling and maximum available output.
Can it connect to a Cerbo GX?
Yes. The integrated VE.Direct port can connect to a compatible Cerbo GX using a separately purchased VE.Direct cable.
This allows local GX monitoring and remote monitoring through the Victron VRM portal. Compatible systems can also use DVCC to coordinate charging through the GX device.
Can I use it as a regulated power supply?
Yes. Power-supply mode provides an adjustable output between 10V and 17V rather than using a multi-stage battery-charging cycle.
Always configure the required output voltage in VictronConnect before connecting the load.
What warranty does it include?
The Victron Orion XS 12/12-50A is backed by Victron Energy’s 5-year limited warranty.
If you need troubleshooting or warranty assistance, Sapphire Energy will work with you throughout the process.
Can you special order Victron products that aren’t listed?
Yes! We can special order many Victron Energy products that are not currently listed on our website. Contact us with the product name or part number, and we’ll confirm availability, pricing and estimated lead time. Many products are stocked locally, just not listed on our website.
Tell us about your alternator, starter battery, auxiliary battery, cable length and expected electrical loads. We can help confirm whether the 50A Orion XS is appropriate and recommend suitable charging-current, cable and fuse requirements.
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