Orion-Tr Smart 24/48-8.5A

The Victron Energy Orion-Tr Smart 24/48-8.5A is an isolated DC-DC converter that can operate as a battery charger or as a regulated power supply. It is designed to convert an input voltage of 24V into an output voltage of 48V at a current of 8.5A, delivering a maximum power of 400W. It is particularly useful in marine systems or vehicles to charge a 48V service battery from a 24V starter battery, or to power equipment requiring a stable 48V supply.

Galvanic isolation is a key feature of this charger. It prevents ground loops, which increases installation safety and significantly reduces electrical interference. This is particularly important in complex systems where multiple devices are connected, ensuring more stable and reliable operation.

The Orion-Tr Smart charger uses a three-stage adaptive charging algorithm: Bulk (rapid charge), Absorption (constant voltage for full charge), and Float (charge maintenance). For lead-acid batteries, the absorption duration is automatically adjusted based on depth of discharge. For lithium batteries, the absorption duration is set by default to 2 hours but can be configured via the VictronConnect app.

Yes, the Orion-Tr Smart 24/48-8.5A charger can be configured to operate in power supply mode. In this mode, it maintains a stable 48V output voltage, regardless of the load applied or input voltage variations, as long as these remain within the product’s specified range.

The adaptive charging algorithm operates in three main stages:

Bulk: The charger delivers maximum charging current to rapidly recharge the batteries. Absorption: Once the absorption voltage is reached, the charger maintains a constant voltage. Duration is adjusted for lead-acid batteries and fixed (default 2h) for lithium batteries. Float: A maintenance voltage is applied to keep the battery fully charged. A new charging cycle is triggered if the voltage drops significantly.

Yes, it is normal for the Orion-Tr Smart DC-DC charger to emit a noticeable odor when operating at or near its maximum power output and when it heats up. This odor is due to the internal potting compound and is not harmful to health.

Yes, the Orion-Tr Smart charger is compatible with smart alternators (ECU-controlled) found in Euro 5 and Euro 6 vehicles. It includes an engine-running detection mechanism that ensures the charger only supplies power when the alternator is active, preventing discharge of the starter battery.

The Orion-Tr Smart 24/48-8.5A charger is compatible with lead-acid batteries (including AGM and Gel) and lithium batteries (LiFePO4). Its adaptive charging algorithm is optimized to extend the lifespan of these two battery types.

The charger is equipped with Bluetooth Smart technology, allowing you to configure it, monitor it, and update its firmware wirelessly. To do this, you must use the VictronConnect application, available for Apple and Android smartphones and tablets.

Yes, in charger mode, the Orion-Tr Smart provides controlled charging that protects the alternator. This is particularly important with lithium battery systems, whose low impedance can potentially overload an alternator if charging is not managed correctly.

The charger is designed for a nominal input voltage of 24V. It features an input voltage lockout function that stops it if the input voltage drops below a configured value and restarts it when the voltage rises above another configured value, ensuring safe and stable operation.

For optimal installation, the charger must be mounted vertically on a non-flammable surface, with the power terminals facing downward. It is important to maintain a minimum clearance of 10 cm above and below the unit to ensure effective cooling. Install it near the battery, but never directly above to avoid damage from battery gases.

Use flexible multistrand copper cables for battery connections. Each individual strand diameter must not exceed 0.4 mm (0.016 in) or have a cross-sectional area of 0.125 mm² (AWG26). For example, a 16 mm² cable must contain at least 122 strands (class 5 or higher). Strands that are too thick can lead to high contact resistance and severe overheating.

Yes, installation must include a fuse. Specific recommendations on fuse type and rating are detailed in the « Cable and fuse recommendations » section of the product manual.

No, the product is not protected against reverse polarity. It is critical to carefully check the polarity before and during the battery connection to avoid damaging the charger or the system.

The Orion-Tr Smart charger has a remote on/off function. You can enable or disable it via a dedicated bipolar connector or directly from the VictronConnect application. This provides flexibility for integration into control systems, such as a manual switch or a battery management system (BMS).

The Orion-Tr Smart charger is equipped with extensive electronic protections to ensure its durability and the safety of your system. These include protection against overheating with power reduction, protection against overloads, protection against short circuits, and protection against connector overheating.

Yes, the charger is designed to operate in various environments. It is normal for it to heat up during operation, which is why it must be installed in a heat-resistant environment with adequate ventilation. For very hot environments, mechanical air extraction may be considered to optimize cooling.

The exact dimensions of the charger, as well as the mounting hole locations, are available in the dimensional drawing found in the product manual appendix. This will allow you to precisely plan its integration into your system.

The product manual provides specific recommendations for battery cables and fuses to be used, but does not state that they are included. Battery cables and fuses are typically purchased separately to match the specific requirements of your installation.