Does it work with lithium batteries?

Yes. The charge algorithm is programmable for lithium as well as lead-acid, set through the VictronConnect app.

Can I use it on a 12V input system?

No. This model takes 24V input and outputs 12V; for 12V input, Victron's 12/12 models are the match.

Do I need the app to use it?

It charges without the app, but changing profiles and monitoring require Bluetooth and VictronConnect.

Yes. Input and output are isolated, which protects the starter battery and reduces ground-loop issues.

What does the three-stage algorithm do?

It runs bulk, absorption and float stages, shortening absorption after shallow discharges and lengthening it after deep ones.

Can it be used as a power supply?

Yes. It can run as a constant voltage source as well as a charger.

Victron Energy Orion-Tr Smart Isolated DC-DC Charger 24/12-20A (240W)

Q: Where is the Victron Energy Orion-Tr Smart Isolated DC-DC Charger 24/12-20A (240W) cheapest?

At Defender Marine, for $41.65, 71% under what the other stores charge, as of our latest check.

Q: What do buyers say about the Victron Energy Orion-Tr Smart Isolated DC-DC Charger 24/12-20A (240W)?

Rated 3.8 out of 5 from 7 ratings.

Q: Where can I buy the Victron Energy Orion-Tr Smart Isolated DC-DC Charger 24/12-20A (240W)?

13 stores we checked sell it, including West Marine, JB Tools, Defender Marine, NVN Marine, Battle Born Batteries.

Best price now

$41.65at Defender MarineChecked 15 h ago

71% under what the other stores charge

Compared across 14 stores. Prices are checked against each store and labelled with when.

Visit Defender Marine

What reviewers say

Owners of vans, RVs and boats rate the Orion-Tr Smart for reliable, configurable charging and easy Bluetooth setup. Complaints center on the app-based configuration and heat under load.

What people mention

SetupPraisedOwners find the VictronConnect app quick for configuring charge profiles.
ChargingPraisedUsers report service batteries reaching full charge on long drives.
HeatMixedSome note the unit runs warm and needs ventilation.
App controlMixedSettings depend on a phone, which some find inconvenient.
OutputCriticisedA few say 20A is slow for large battery banks.

About the Victron Energy Orion-Tr Smart Isolated DC-DC Charger 24/12-20A (240W)

The Orion-Tr Smart 24/12-20A is an isolated DC-DC charger that converts a 24V input to a 12V output. It works as a battery charger or as a power supply with a constant output voltage. It suits vehicles with a Euro 5 or Euro 6 smart alternator, which often supplies too low a charging voltage. It also helps on boats and RVs, where long cable runs cause voltage drops.

For charging, it uses an adaptive three-stage algorithm: bulk, absorption and float. With lead-acid batteries, absorption time stays short after shallow discharges and increases automatically after deep discharges. With lithium batteries, absorption time is fixed, at 2 hours by default. A fixed output voltage can be selected instead. Engine-running detection stops the charger when the engine is off, which prevents the starter battery from discharging.

Bluetooth lets any enabled smartphone, tablet or other device monitor the charger, change settings and update its software. The VictronConnect app shows key data, warnings and alarms on the device list page without connecting to the charger. A remote on/off switch or relay contact connects to a two-pole connector. All models are short-circuit proof, and an unlimited number of units can be paralleled to increase output current. Output current reduces at high ambient temperatures. Installation uses screw terminals and needs no special tools.

Type

Isolated DC-DC charger and power supply

Input voltage

24V nominal; range 16-35 V

Under-voltage

Shuts down at 14 V; restarts at 15 V

Output voltage

12.2 V nominal; adjustable 10-15 V; tolerance ±0.2 V

Output current

20 A continuous at 40°C; 25 A maximum for 10 seconds; 50 A short-circuit

Output power

300 W continuous at 25°C; 240 W continuous at 40°C