What size DC-DC chargers are you using?

Submitted: Monday, May 12, 2025 at 12:22
ThreadID: 150382 Views:1386 Replies:11 FollowUps:18
Hi people, hoping to get an idea of what's being used and what is reasonable. I am running an enerdrive 40a dc-dc in the canopy of the car, but have it set to 20a at the moment. I am now towing a caravan (god help me!) and it is currently running 1 x 25a dc-dc to the van batteries. There is another 25a unit available if required (taking it to 50a- see how good my maths were there?)

This in a 2017 Ranger with 150a alternator. I have been told(!) 60% draw is reasonable, taking into account the general requirements of the vehicle- not sure about this. So I can leave it as is (45a total), switch up the unit in the canopy back to 40a (65a total), leave the canopy unit at 20A and connect the second unit in the van (70a) or let it all go free and draw 40a in the canopy, 50a in the van!!!.

Or I can get a larger alternator fitted (prefer not...).

Any comments/recommendations?

PS: posted in Grey Nomads as well, I know some of you are on both forums...


Cheers, Mark
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