Description
Victron Orion XS 12/12-70A DC-DC battery charger · Part no. ORI121221040 · 9–17V in · 10–17V out · 1–70A adjustable · 1000W at 14V
The Orion XS 12/12-70A is the highest-current 12V model in Victron's Orion XS range. It charges a service battery from a vehicle's or boat's alternator and starter battery in a 12V system, and can also run as a fixed-voltage DC power supply.
Key features
- Smart alternator compatible: built-in engine shutdown detection means it only draws power while the alternator is charging, with no extra sensor. An external engine-running signal can also be used.
- Adaptive four-stage charging: bulk, absorption, float and storage, with eight battery presets and fully programmable settings for lead-acid and lithium batteries.
- Adjustable current: input and output current limits set from 1A to 70A, to protect the alternator.
- Emergency reverse charge: started from the VictronConnect app, it charges a flat starter battery from the service battery at up to 35A.
- Protection: overload, short-circuit and over-temperature protection, low-temperature charge cut-off for lithium, and input voltage lock-out to protect the starter battery. Not protected against reverse battery polarity.
- Monitoring: built-in Bluetooth for the VictronConnect app, VE.Direct port for a GX device and VRM (including DVCC), and VE.Smart Networking for remote voltage, temperature and current sensing.
- Parallel operation: an unlimited number of Orion XS units can be connected in parallel for more charge current.
- Remote on/off via switch, signal or BMS allow-to-charge contact.
Installation note: unlike the Orion XS 12/12-50A, the 70A model uses fan cooling. Its internal electronics are sealed to IP65, but the unit overall is rated IP20 and is not waterproof, so mount it in a dry, ventilated location.
Technical specifications (Victron)
- Input voltage range: 9–17V
- Output voltage range: 10–17V (adjustable)
- Current setting range: 1–70A
- Short-circuit current: 70A maximum, constant
- Continuous output power up to 40°C: 1000W (nominal, at 14V)
- Maximum efficiency: 98.5%
- No-load current: <100mA · Standby current: <1.5mA
- Operating temperature: -20 to +60°C (derating 1.5% per °C above 40°C)
- Ingress protection: IP20 overall (internal electronics IP65)
- Maximum cable cross-section: 25mm² (4 AWG)
- Dimensions (h × w × d): 137.3 × 123.1 × 40mm
- Weight: 0.34kg
- In the box: Orion XS 12/12-70A with terminal block for remote on/off connection
Compare: Orion XS 12/12-50A (IP65, 700W) · Orion XS 1400 (12V/24V, 1400W at 28V)



