How do i protect my alternation from this drawing too much current i have a large lifepo4 battery bank?

That’s exactly the point. If you use it to charge from a flood/AGM starting battery, it will limit the draw to the D.C.-D.C. charger rating. So if you have a 60A alternator, choose 20-30A charger

I dont want my battery to be used to start my rv. does the charger contain a backfeed diode (to prevent power coming from the rv battery)?

A reverse current from the RV battery cannot occur. In addition, the Orion-TR Smart is isolated galvanically separated.

I’ve connected the input terminals to the starter battery and confirmed 14.4 v at the input terminals. Why won’t my unit turn on? Defective unit?

There is a green connector inside the box to connect to the "remote" on the left side of the unit. It cannot run if there is a discontinuity between the 2 pole of this remote.

Does this have a built in battery protect, or do i need to add this separately?

Not sure what you mean. It does monitor voltage levels and you can set specific charging profiles. I believe it may have reverse polarity protection in case you hook up the battery wrong.

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DC-DC Bluetooth Charger Orion-Tr ORI 122436120 Smart 12/12-30A (360W) Isolated B2B Booster

Product ID: 370334909

Details

Brand
Victron Energy
Colour
Blue
Item weight
1.35 Kilograms
Output voltage
12 Volts (DC)
Product dimensions
8.1D x 18.5W x

⚡30A high current output

📶Bluetooth smart monitoring

🔋Supports lead acid & lithium

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¥63435

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In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Charge smarter, not harder — stay powered and connected!

SCALABLE POWER BOOST - Connect unlimited units in parallel to multiply your charging capacity
POWER UP WITH PRECISION - 30 Amp, 360W adaptive 3-stage charging for optimal battery health
COMPACT DURABLE DESIGN - Sleek 8.1x18.5x13 cm form factor with UL certification for professional reliability
SEAMLESS BATTERY COMPATIBILITY - Works flawlessly with both lead acid and lithium batteries
SMART CONTROL AT YOUR FINGERTIPS - Bluetooth-enabled for real-time monitoring and remote programming

The Victron Energy Orion-Tr Smart 12/12-Volt 30 Amp 360-Watt DC-DC Charger Isolated with Bluetooth is a professional-grade adaptive 3-stage charger designed for both lead acid and lithium batteries. It features Bluetooth smart technology for remote monitoring and control, supports parallel connection of multiple units to scale output power, and meets UL safety standards. Compact and reliable, it’s the go-to solution for efficient, intelligent battery charging in automotive and industrial applications.

Specifications

ASIN	B07ZKG396Y
Amperage	30 Amps
Best Sellers Rank	#4,790 in Automotive ( See Top 100 in Automotive ) #27 in Battery Chargers
Brand	Victron Energy
Built-In Media	Victron Energy Orion-Tr Smart 12/12-Volt 30 amp 360-Watt DC-DC Charger Isolated (Bluetooth)
Color	Blue
Colour	Blue
Compatible Devices	Lead Acid Batteries, Lithium Batteries
Connector Type Used on Cable	Screw Terminals
Current Rating	30 Amps
Customer Reviews	4.6 out of 5 stars 1,839 Reviews
Global Trade Identification Number	08719076047698
Input Voltage	12 Volts (DC)
Item Dimensions D x W x H	8.1D x 18.5W x 13H centimeters
Item Type Name	Victron Energy Orion-Tr Smart 12/12-Volt 30 amp 360-Watt DC-DC Charger Isolated (Bluetooth)
Item Weight	1.35 Kilograms
Item weight	1.35 Kilograms
Manufacturer	Victron Energy
Mfr Part Number	ORI121236120
Model Number	ORI121236120
Output Voltage	12 Volts (DC)
Output voltage	12 Volts (DC)
Product dimensions	8.1D x 18.5W x 13H centimeters
Specification Met	UL
Specification met	UL
Unit Count	1.0 Count

Reviews

H**O

Top

Victron orion top.

16.03.2026

G**M

Funktioniert wie es soll

Gutes Produkt

5.05.2026

L**D

Conforme a la description

5.11.2024

K**E

Mycket bra laddare

Väldigt bra produkt som kom snabbt och fungerar utmärkt. Inbyggd bluetooth möjliggör konfiguration av dom olika inställningarna. Det går att köra produkten som laddare och strömkälla och man kan välja när den skall sättas igång, med mera. Väldigt nöjd!

24.09.2024

L**S

Épico viaje por todo el país gracias a su aplicación en mi motorhome

Epico

1.03.2026

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¥63435

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In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

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