Victron Energy ORI122436120 Orion-Tr Smart 12/24-15A (360W) Isolated DC-DC Charger

Victron Energy Orion-Tr Smart 12/24-15A Step Up. Charge Smart. 12V Source to 24V Bank.

Product Overview

The Victron Energy Orion-Tr Smart 12/24-15A (ORI122436120) is a professional-grade isolated DC-DC charger rated at 15 amps and 360 watts, designed to step a 12V DC source up to charge a 24V secondary battery bank the opposite conversion direction to the more common step-down units. This makes it the correct choice for dual battery systems where the primary source is 12V such as a 12V vehicle alternator or 12V starter battery and the secondary bank is a 24V house, service, or traction battery.

Like the broader Orion-Tr Smart range, the ORI122436120 is a true adaptive 3-stage charger not just a DC-DC power supply. It delivers Bulk (Boost), Absorption, and Float charge stages for both lead acid and lithium batteries, with full programmability via the VictronConnect app over built-in Bluetooth. Smart alternator compatibility with built-in engine shutdown detection prevents the charger from discharging the 12V starter battery when the alternator is not actively supplying power an essential feature in modern vehicles with ECU-controlled variable-voltage alternators. The Input Voltage Lock-out adds a further layer of protection, preventing operation below a defined input threshold to avoid over-discharging the source battery. Full rated output is maintained to 40°C, with operation continuing to 55°C via thermal derating relevant across Australian 4WD, marine, and off-grid applications where ambient temperatures regularly challenge electronics.

Key Specifications

• Part Number: ORI122436120
• Charger Type: Isolated DC-DC adaptive 3-stage charger (step-up)
• Input Voltage: 12V DC nominal
• Output Voltage: 24V DC
• Output Current: 15A
• Output Power: 360W
• Conversion Direction: Step-up — 12V input to 24V output
• Isolation: Galvanically isolated (input and output fully separated)
• Charge Algorithm: Adaptive 3-stage — Bulk/Boost, Absorption, Float
• Battery Compatibility: Lead acid (all types) and lithium
• Bluetooth: Built-in (VictronConnect app — iOS and Android)
• Smart Alternator Compatible: Yes — engine shutdown detection
• Input Voltage Lock-out: Yes
• Remote On/Off: Yes
• Short Circuit Protection: Yes
• High Temperature Protection: Yes
• Operating Temperature: Full rated output to 40°C; operates to 55°C with thermal derating
• IP Rating: Not specified — confirm with supplier
• Parallel Operation: Not specified — confirm with supplier

Features & Benefits

• Step-Up Conversion — 12V to 24V — The ORI122436120 charges a 24V secondary battery from a 12V primary source. This is the correct unit for systems where the vehicle or source is 12V and the house, service, or auxiliary bank operates at 24V — a configuration common in marine vessels, motorhomes, and hybrid off-grid builds. Do not confuse with step-down units; confirm your input and output voltage requirements before purchase.
• Galvanic Isolation — The 12V input and 24V output circuits are fully electrically separated. This prevents ground loops, eliminates stray current corrosion risks in marine installations, and allows a lithium BMS on the 24V secondary bank to independently control charging without interference from the 12V source. A basic non-isolated step-up converter cannot provide these guarantees.
• True Adaptive 3-Stage Charging — Bulk/Boost, Absorption, Float — Charges your 24V secondary battery through three managed stages rather than applying a fixed output voltage. Bulk/Boost delivers maximum current to rapidly recharge to approximately 80% state of charge. Absorption holds at the correct voltage while current tapers naturally as the battery fills — preventing overcharge on lead acid and correctly managing lithium cells. Float maintains a full battery at a safe holding voltage without continuing to push charge current. This is how batteries should be charged for long-term health.
• Smart Alternator Compatible — Engine Shutdown Detection — Detects when the 12V alternator is actively supplying power and disables the charger when it is not — preventing discharge of the 12V starter battery during engine-off periods or low-output alternator phases in ECU-controlled vehicles. Compatible with current-generation smart alternators across passenger vehicles, light commercial, and 4WD platforms.
• Input Voltage Lock-out — A configurable minimum input voltage threshold below which the charger will not operate. This prevents the charger from drawing the 12V source battery below a defined state of charge — protecting starter battery reserve and preventing over-discharge in systems where the source battery serves other critical loads.
• Built-in Bluetooth — VictronConnect App — Monitor real-time charging status, configure battery charge profiles, adjust the input voltage lock-out threshold, and update firmware wirelessly via any iOS or Android device running the free VictronConnect app. No additional hardware required for direct charger monitoring and configuration.
• Fully Programmable Charge Algorithm — Battery voltage setpoints, absorption time, charge current limits, and input lock-out thresholds are all configurable via VictronConnect. Supports both pre-programmed battery profiles and fully custom parameters for non-standard battery specifications.
• Lead Acid and Lithium Compatible — Programmable charge profiles cover all lead acid types — flooded, AGM, gel — and lithium chemistries. Select the correct profile for your 24V secondary battery via the VictronConnect app.
• Remote On/Off — Enable and disable the charger via a hardwired remote on/off connector, a BMS control signal, or the VictronConnect app. Supports manual user control and automatic BMS-driven charge management.
• Short Circuit Protection — Output is protected against short circuits without damage to the charger or connected wiring.
• High Temperature Protection — Built-in thermal management with power derating above 40°C ambient. The charger reduces output progressively rather than cutting off abruptly — maintaining partial charging in hot conditions while protecting internal components.

Technical Specs