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klaudiagyogyfiova avatar image
klaudiagyogyfiova asked

Victron Orion-TR 12/24-30 isolated

Dear customer service, I would like to inform, if I connect a 12V lead batteries from Fiat Ducato 2020 (120A alternator), with a 24V lifepo4 battery 2x200A power system. Will be the Victron Orion-TR 12/24-30 isolated the best option? The 24V system is not grounded to the body of the vehicle

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2 Answers
danjul avatar image
danjul answered ·

Theres unfortunately no 12/24 30A option, if you want one with bluetooth you could aim for the Orion-Tr Smart 12/24-15A Isolated DC-DC charger (ORI122436120).


Im running the 12/12-30 which is the equivalent to the 12/24-15 but for 12V in a RV with perfect results.

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klaudiagyogyfiova avatar image klaudiagyogyfiova commented ·

In Netherlands there is option to buy the Victron Orion-TR 12/24-30 isolated: https://www.bluepowershop.nl/victron-omvormer-orion-tr-smart-24-12-30a-360w-met-galvanische-scheiding.html . But these Orion-TR 12/24-15A or 12/24 30A options will be fits in my system right? Thank you

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danjul avatar image danjul klaudiagyogyfiova commented ·

That's a 24V input and 12V output in your link. (wrong direction)

I would go with the bigger one with bluetooth(called "smart") since you have a very large house battery.

Orion-Tr Smart 12/24-15A Isolated DC-DC charger - ORI122436120

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kevgermany avatar image
kevgermany answered ·

You must use 12/24 models.

To get a higher current, use multiple Orions in parallel.

It will be part of the installation to have a common ground between the vehicle battery and 24V system.

Be careful you don't overload the alternator. Try to stay below 50% of it's rated output when you add the Orion load to the existing loads. 15A at 24V is 30A at 12V. Add in lights, computer, fuel pump etc.

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klaudiagyogyfiova avatar image klaudiagyogyfiova commented ·

Thank you for your response, so if I understand correctly: when I have a 120A alternator combined with 24V system, and if I will use 2x Orion-Tr Smart 12/24-15A-Isolated installed in parallel, I will be at 30A, so Im still on the safety side.

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bradleyh avatar image bradleyh klaudiagyogyfiova commented ·
No, each Orion-Tr Smart 12/24 15 will provide 15A charging current to the 24V system (house batteries), but each Orion will draw 30A from the 12V starter battery/alternator so with two Orion's in parallel the load on the alternator will be 60A (probably slightly higher because they are only 88% efficient). I don't know much about loading alternators, but 60A seems like a lot for a 120A alternator to provide continuously for a long period of time.
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kevgermany avatar image kevgermany ♦♦ bradleyh commented ·

@klaudiagyogyfiova

Also there's the vehicle consumption

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