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Post Info TOPIC: What size DC-DC chargers are you using?


Member

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Posts: 14
Date:
What size DC-DC chargers are you using?


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?biggrin)

This in a 2017 Ranger with 150A alternator (I believe, based upon online advice). 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?

 

Cheers, Mark



-- Edited by Silkwood on Monday 12th of May 2025 11:23:48 AM



-- Edited by Silkwood on Monday 12th of May 2025 11:54:23 AM

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  Mark  



Senior Member

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Posts: 389
Date:

What capacity batteries?
Any solar on the van?

We don't use a DC-DC charger. In the unlikely event that we need any extra charge I get it direct from the alternator.

Cheers,
Peter



-- Edited by Peter_n_Margaret on Monday 12th of May 2025 01:24:08 PM

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OKA196 DIY, self contained 4WD motorhome, 1160W PV, 326Ah of CALB LiFePO4 batteries, 1.3kW inv, 310L water, 350-450L diesel.



Member

Status: Offline
Posts: 14
Date:

Having posted elswhere and received advice from a number of people (including Peter, as above), I have decided to leave my units on 20a in the canopy, 25a in the van. should suit my needs adequately and will place little strain on the alternator.

Cheers,
Mark

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  Mark  

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