Victron Energy ORI122424120 Orion-Tr Smart 12/24-10A (240W) Isolated DC-DC Charger

Victron Energy Orion-Tr Smart 12/24-10A Step Up, Charge Smart, Protect Your Alternator.

Product Overview

The Victron Energy Orion-Tr Smart 12/24-10A (ORI122424120) is a professional-grade isolated DC-DC charger rated at 10 amps and 240 watts, designed to step a 12V DC source up to charge a 24V secondary battery bank. It is the correct unit for dual battery systems where the vehicle alternator or starter battery is 12V and the house, service, or auxiliary bank operates at 24V configurations common across marine vessels, motorhomes, and off-grid hybrid builds.

Beyond voltage conversion, the Orion-Tr Smart 12/24-10A operates as either a true 3-stage battery charger or a regulated fixed-output power supply switchable via the VictronConnect app. In charger mode, adaptive Bulk, Absorption, and Float stages correctly charge both lead acid and lithium batteries for long-term health. In fixed output mode, it delivers a stable 24V supply regardless of input voltage variation or load useful when powering 24V equipment directly rather than charging a battery. The built-in engine shutdown detection prevents the charger from drawing down the 12V starter battery when the alternator is not running, and the forced allowed-to-charge input enables activation via ignition switch without any intervention in the vehicle's CAN-bus or wiring system. For lithium secondary battery systems specifically, the Orion-Tr Smart also provides active alternator protection preventing overload of the alternator caused by the characteristically low impedance of lithium battery banks during bulk charging.

Key Specifications

• Part Number: ORI122424120
• Charger Type: Isolated DC-DC adaptive 3-stage charger (step-up)
• Input Voltage: 12V DC nominal
• Output Voltage: 24V DC
• Output Current: 10A
• Output Power: 240W
• Conversion Direction: Step-up — 12V input to 24V output
• Operating Modes: Charger (3-stage adaptive) or fixed output (power supply)
• Isolation: Galvanically isolated (input and output fully separated)
• Charge Algorithm: Adaptive 3-stage — Bulk, 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
• Forced Allowed-to-Charge Input: Yes — ignition switch compatible
• Remote On/Off: Yes — H/L terminal connector, hardwired switch or relay
• Short Circuit Protection: Yes
• High Temperature Protection: Yes — output current reduces at high ambient temperature
• IP Rating: IP43 (when installed with screw terminals oriented downward)
• Terminals: Screw terminals — no special tools required
• Parallel Operation: Yes — unlimited units
• Minimum Cable Size: 10mm²
• Required Circuit Protection: 60A on both starter battery and auxiliary battery sides
• Operating Temperature: Full rated output to 40°C; operates to 55°C with output derating

Features & Benefits

• Step-Up Conversion — 12V to 24V — Charges a 24V secondary battery from a 12V primary source. This is the correct unit where the vehicle, vessel, or source system is 12V and the house or service bank is 24V. Do not use in applications requiring 24V-to-12V step-down — the Orion-Tr Smart 24/12 range is required for that direction.
• Dual Operating Mode — Charger or Fixed Output — In charger mode, the 3-stage adaptive algorithm correctly charges lead acid and lithium batteries. In fixed output mode, the unit delivers a stable regulated 24V supply regardless of input variation or load changes — functioning as a DC power supply for 24V equipment rather than a battery charger. Switchable via the VictronConnect app.
• Galvanic Isolation — The 12V input and 24V output circuits are fully electrically separated. Eliminates ground loops, prevents stray current corrosion in marine installations, and allows a 24V lithium BMS to independently control charging without interference from the 12V source system.
• Lithium Alternator Protection — Lithium batteries have very low internal impedance during bulk charging, which can draw more current than a vehicle alternator is rated to supply — potentially causing premature alternator failure. The Orion-Tr Smart manages charge current to prevent alternator overload, making it the correct solution for lithium secondary battery systems where direct alternator-to-lithium charging would be problematic.
• Adaptive 3-Stage Charging — Bulk, Absorption, Float — Charges correctly, not just quickly. Bulk delivers maximum available current for rapid recharge. Absorption holds at the correct voltage while current tapers — with adaptive absorption time that shortens for shallow discharges and extends automatically for deep discharges on lead acid, and a fixed 2-hour default for lithium. Float maintains a full battery at a safe holding voltage without overcharging. The right charge profile for battery longevity, not just state of charge.
• Engine Shutdown Detection — Smart Alternator Compatible — Monitors whether the 12V alternator is actively supplying power and disables the charger when it is not. Prevents discharge of the 12V starter battery during engine-off periods or low-output alternator phases in ECU-controlled smart alternator vehicles. No CAN-bus intervention or separate engine run sensor required.
• Forced Allowed-to-Charge Input — An additional activation input allows the charger to be enabled by an ignition switch signal — independently of or in combination with engine shutdown detection. Provides a clean, non-intrusive integration path into the vehicle's switched power system without modifying factory wiring.
• Flexible Remote On/Off — The two-pole remote connector supports multiple control configurations: a hardwired switch or relay contact across the two terminals; the H terminal (right) switched to battery positive; or the L terminal (left) switched to battery negative or vehicle chassis. Compatible with BMS charge enable outputs, manual switches, and relay-controlled circuits.
• Built-in Bluetooth — VictronConnect App — Monitor charging status, switch between charger and fixed output modes, configure battery profiles, adjust parameters, and update firmware via any iOS or Android device. No additional hardware required for direct charger monitoring and full configuration.
• Unlimited Parallel Operation — An unlimited number of ORI122424120 units can be connected in parallel to increase combined output current — scale beyond 10A as system requirements grow without replacing the charger.
• IP43 Protection — Protected against solid objects greater than 1mm and water spray up to 60° from vertical, when installed with screw terminals oriented downward. Suitable for enclosed panels, protected bilge spaces, and under-bonnet installations with the correct mounting orientation.
• Screw Terminals — No Special Tools — Standard screw terminal connections accommodate the required cable sizes without specialist crimping tools, reducing installation complexity and enabling field servicing.
• High Temperature Protection with Output Derating — Output current reduces progressively at high ambient temperatures rather than cutting off abruptly — maintaining partial charging in hot conditions while protecting internal components. Full rated 10A output is maintained to 40°C; operation continues to 55°C with derating.

Technical Specs