DC-DC Charger recommendations

Discussion in 'Power Systems' started by woytovich, Mar 10, 2017.

  1. woytovich

    woytovich Fake news SILVER Star

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    Thinking of getting a DC-DC charger to charge the battery in my portable smart battery box while driving.

    Considering the CETK D250s Dual
    D250S DUAL

    Anyone have any experience with this one or any others please post up.

    Thanks,
    Mark
     
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  2. CarolinaFJ

    CarolinaFJ

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    I think it's a good choice. I don't have experience with it personally but I have seen it used and seems to be well reviewed. The other route would be putting in a split charge system, which probably is around the same cost. If you already have a box it is likely cost prohibitive to do an all in one unit that has a controller but they are out there as well.
     
  3. mep1811

    mep1811

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  4. woytovich

    woytovich Fake news SILVER Star

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    As I understand it:

    The DC-DC charger is a smart charger fully charging and maintaing a battery.

    Modern vehicles, like my tow vehicle, often have electronics that control the alternator so that it puts out lower current when vehicle operation would indicate less was needed - older alternators were "dumb" and supply current "on demand" only.

    It also uses less current both before and after the charger so wire size can be much smaller.
     
  5. glocker21

    glocker21

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    KISAE DMT1230 Abso 30A DC-DC Battery Charger works great for me. Look at Donrowe.com for them,Kisae is a darned good product and I love mine. I run it in my JK and have cables with Anderson Connectors for my portable solar panels
     
  6. nickolai

    nickolai

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    I'm looking into this at the moment. My current options are the Cteck D250s, Redarc BCDC or the Projecta IDC25.

    I like ctek most, as it has those nice bolt down terminals - tidier wiring. Its expandable too - can add the Smartpass system on later. I have 2 other ctek mains chargers so perhaps I'm a bit bias. Also like that it can take solar - the Redarc can't, the projecta can.

    Do you know if the ctek boards are epoxied? the Redarc ones definitely are.

    I've had relay based systems before and they're fine, for light duty, where the battery size is way over the load. Once you start drawing your batteries down a bit then you'll appreciate the better charging profile of the DC-DC systems.
     
  7. RFB

    RFB 97 FZJ80 LIFTED SC DUAL BATTERIES,37s GOLD Star

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    Im in same boat, I have 170AH worth of batteries and want the house 100AH to be fully charged even with my tundra 150AMP alternator upgrade I dont think the national luna set up does it well. I also want o switch to a DC to DC with solar input.
     
  8. nickolai

    nickolai

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    In my 70 series I had a 100AH battery charged through a relay system. It worked well but all it was running was my Waeco fridge and some usb chargers. For a simple set up these work well, provided that your alternator is up to the task. Eventually though the battery will not like being discharged too far etc.

    In my 80 I'm going to go dc-dc, as i plan on having the fridge, USBs and probably an inverter.

    To build on my previous comments, the The Redarc BCDC 1220 (20 amp model) can't do solar. The 1225 (25 amp) and above can do solar. Plus these do proper 7 stage (or whatever marketing thing) charging which will be kinder on your batteries.
     
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