Victron Energy ORI242440140 Orion-Tr Smart 24/24-17A (400W) Non-isolated DC-DC Charger

Victron Energy Orion-Tr Smart 24/24-17A Managed 24V-to-24V Charging. Smart Alternator Ready. Non-Isolated.

Product Overview

The Victron Energy Orion-Tr Smart 24/24-17A (ORI242440140) is a professional-grade non-isolated DC-DC charger rated at 17 amps and 400 watts, designed to charge a 24V secondary battery bank from a 24V primary source. Where a basic voltage-sensitive relay (VSR) simply parallels two 24V batteries when voltage rises, the Orion-Tr Smart provides fully managed, adaptive 3-stage charging Bulk, Absorption, and Float ensuring the secondary battery receives a correct, controlled charge profile regardless of what the primary system is doing.

The non-isolated topology means input and output share a common ground making this unit more efficient and straightforward to install than its galvanically isolated counterpart, and the appropriate choice for the majority of 24V-to-24V dual battery systems where ground separation is not a requirement. Built-in engine shutdown detection prevents the charger from drawing down the 24V starter battery when the alternator is not running critical for smart alternator compatibility in modern vehicles. Eight pre-programmed battery profiles and a fully programmable algorithm via the VictronConnect Bluetooth app cover both lead acid and lithium chemistries. With IP43 protection, unlimited parallel expansion, and full output sustained to 40°C, the ORI242440140 is a fit-and-forget solution for 24V dual battery builds across 4WDs, trucks, marine vessels, and off-grid systems.

Key Specifications

• Part Number: ORI242440140
• Charger Type: Non-isolated DC-DC adaptive 3-stage charger
• Input Voltage: 24V DC nominal
• Output Voltage: 24V DC
• Output Current: 17A
• Output Power: 400W
• Conversion: Same voltage — 24V to 24V (managed charging, not voltage conversion)
• Isolation: Non-isolated — input and output share common ground
• Charge Algorithm: Adaptive 3-stage — Bulk, Absorption, Float
• Battery Profiles: 8 pre-programmed + fully programmable
• Battery Compatibility: Lead acid (all types) and lithium
• Bluetooth: Built-in (VictronConnect app — iOS and Android)
• Smart Alternator Compatible: Yes — engine running detection
• Remote On/Off: Yes — hardwired connector and VictronConnect app
• IP Rating: IP43
• Parallel Operation: Yes — unlimited units
• Operating Temperature: Full rated output to 40°C; operates to 55°C with thermal derating
• Protection: Over-temperature with power derating, overload, short circuit, connector over-temperature

Features & Benefits

• Non-Isolated 24V-to-24V Managed Charging — Both batteries are 24V, but the Orion-Tr Smart is not simply connecting them. It draws power from the 24V primary source and delivers a fully managed, adaptive charge to the 24V secondary battery — controlling current, voltage, and charge stage independently of what the primary system's alternator or charger is doing. This is what separates it from a VSR or battery-to-battery isolator: correct charging, not just voltage-based switching.
• Non-Isolated Topology — Efficient and Straightforward — The non-isolated design shares a common negative between input and output, delivering higher efficiency and simpler installation than galvanically isolated equivalents at the same power level. Appropriate for the large majority of 24V dual battery systems where galvanic isolation between primary and secondary circuits is not required. If galvanic isolation is needed — for specific marine corrosion concerns or lithium BMS configurations referencing the secondary battery — the Orion-Tr Smart Isolated range is the correct alternative.
• Adaptive 3-Stage Charging — Bulk, Absorption, Float — Charges the secondary 24V battery correctly through three managed stages. Bulk delivers maximum available current for rapid recharge. Absorption holds at the correct voltage while current tapers naturally — with adaptive absorption time that shortens for shallow discharges and extends for deep discharges on lead acid, and a fixed 2-hour default for lithium. Float maintains a fully charged battery at a safe holding voltage. A new charge cycle is triggered automatically if the battery voltage drops substantially for more than one minute under load — keeping the secondary battery ready without manual intervention.
• Eight Pre-Programmed Battery Profiles + Custom Algorithm — Select from eight factory profiles covering lead acid (flooded, AGM, gel) and lithium chemistries via the VictronConnect app, or configure a fully custom charge algorithm for non-standard battery specifications. No manual setpoint calculation required for standard battery types.
• Smart Alternator Compatibility — Engine Running Detection — Monitors whether the 24V alternator is actively supplying power and disables the charger when it detects the alternator is not running. Prevents the charger from drawing down the starter battery during engine-off periods or low-output alternator phases in ECU-controlled vehicles. Compatible with current-generation variable-voltage smart alternators without CAN-bus intervention.
• Built-in Bluetooth — VictronConnect App — Full monitoring and configuration from any iOS or Android device. Switch battery profiles, adjust charge parameters, monitor real-time charging status, and update firmware wirelessly. Direct Bluetooth access in the field requires no additional hardware.
• Remote On/Off — Hardwired and App-Controlled — Enable and disable the charger via a hardwired remote switch, relay contact, BMS charge control output, or directly through the VictronConnect app. Supports both manual user control and automatic BMS-driven charge management.
• Unlimited Parallel Operation — Connect additional ORI242440140 units in parallel to increase combined charging current beyond 17A — 34A with two units, 51A with three, and so on. Each unit manages its own charge algorithm independently.
• IP43 Rated — Protected against solid objects greater than 1mm and water spray up to 60° from vertical. Suitable for enclosed panel, protected under-bonnet, and marine compartment installations.
• Over-Temperature Protection with Power Derating — Output current reduces progressively at high ambient temperatures rather than cutting off abruptly. Full 17A output is sustained to 40°C; the charger continues operating to 55°C with derating, maintaining partial charging in hot conditions without damaging the unit.
• Connector Over-Temperature Protection — Independent protection for the terminal connections against heat buildup under sustained high-current operation — a meaningful protection point at 400W continuous output.

Technical Specs