Wiring for DC to DC trailer charging

[SARRandy]

Hi, I am a new 4runner TRD ORP owner and want to wire my 4runner to be able to charge my trailer batteries while driving via a Victron DC/DC charger. My previous tow vehicle was set up for the charging and it worked fine. Has anyone wired their 4runner to do this? I am assuming the alternator is big enough to handle the charging (I hope).

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[Boobajoob]

You ever find out the power output? Or did your victron work? I’m looking at installing an Orion xs to charge my camper if I’m several days with little sun

 

[SARRandy]

I talked to the Toyota dealer and they were not particularly helpful. They said the alternator would probably be OK. I got this answer second hand from the service advisor and he did not know the alternator size or output requirements. He gave me a referral to a truck accessory outfit that he was sure would know the answer. They didn't have a clue. So at this point, I am going to hold off until I find a better answer. I don't want to screw up any of the electronics on the truck (or void a warranty).

 

[Boobajoob]

Have you looked at the new victron xs? It watches voltage drop then limits feeding the charge. It’s designed to work with the whatever the alternator can give.

If I find anything more I’ll try to remember to post

 

[SARRandy]

I have the victron Orion-Tr Smart 12/12 - 30 non isolated DC/DC charger installed in my trailer. It is also supposed to manage voltage. I am just a bit anxious about messing up my expensive ORP 4runner! One would think that Toyota would put a large enough alternator to handle this simple task. There are plenty of youtube videos about people messing up their vehicles with DC/DC charging..... I should point out that I did wire my 2016 Toyota Highlander and everything worked fine with the charger.

 

[AmericanAdventureLab]

We've had great luck with RedArc BCDC's. It would be a piece of cake to run the wires back to an anderson plug that can branch back to the camper. The BCDC's isolate, and have solar input as well. It's a great setup, and small.

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