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mateaco avatar image
mateaco asked

DC to DC charger needs

Hi,

Which DC to DC charger do I need for a 100 amp van battery with 400ah of leisure batteries? Also what size fuse between do I need between charge and leisure batteries? Do I need a fuse between van batteries and charger?

Thanks,

Mel

dc-dc charger
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klim8skeptic avatar image
klim8skeptic answered ·

@mateaco If you have a look at the Manual you can find recommendations regarding cabling and fusing.

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kevgermany avatar image
kevgermany answered ·

You'll need to work out how much power is available from your alternator and how much the van electrics use. Rule of thumb is to aim to keep the charger plus electrics draw below half the alternator output.

Then you need to do the maths on the loads on the house bank and make sure you have enough charging available based on your expected driving time per day. You may need other charging - solar, grid, generator...

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mateaco avatar image mateaco commented ·
thanks, I have other charging, solar and shore, and I have a DC to DC charger from renogy but it keeps blowing the 90A fuse between the van batteries and the DC to DC charger. My solar keeps up pretty well, just would like to get the DC to DC working correctly. I'm willing to buy a Victron unit I just don't know which one would work best.


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