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Thread: DC2DC charging

  1. #261
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    Quote Originally Posted by Kaptein Jack View Post
    Thanks. They don't seem to have a proper manual or datasheet, that explains everything.

    On the dimension diagram, it seems like there are 3 screw terminals - is one of them a load sense connection?
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    Quote Originally Posted by Greg View Post
    On the dimension diagram, it seems like there are 3 screw terminals - is one of them a load sense connection?
    No, it is a remote trigger, which can be de-activated with a dip switch.
    Everything is a hammer.
    Unless it is a screw driver.

    Then it it a chisel.

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    Quote Originally Posted by Uys View Post
    No, it is a remote trigger, which can be de-activated with a dip switch.
    Hmmm... then I really don't understand the load shedding feature.
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    Guys...

    How do you use the BC1212-15 in conjunction with solar panels

    Thanks
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  5. #265
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    Don't think one can. You need a separate controller for the solars.

    Haven't read all, but the proper deep cycle batteries was no use in DB system, as it needs to be charged at maks 10% of its capacity (8 amp for 80Ah battery) over a long time, so no use with an alternator and few hours drive.
    But the semi deep cycle like the deltec 105 could be charged with a solenoid (NL) system from the alternator, and obviously the normal high cycle, which work excellent as an aux battery if you don't stretch it too much, still make sense if you know the limits, which you may never reach doing one or two trips a year with driving a couple of hours everyday.

    But now with the AGM and lead crystals deep cycles (but needs 14.4V for charging, and having 3 to 6 times longer life) which can be charged at 25 to 30% of its capacity, ideal for the CTEK dual dc to dc, one can replace the semi deep cycles and high cycles!! to have a more versatile system, and incorporate solar charging. Panels are very affordable now.
    Same size battery will give much longer run time on the fridge with no effect on the battery. Maybe still a bit expensive but a much better system.
    Last edited by JLK; 2013/01/13 at 03:53 PM.
    Johan Kriel

  6. #266
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    doubble post
    Last edited by JLK; 2013/01/13 at 09:55 PM.
    Johan Kriel

  7. #267
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    I am going to buy a Snomaster 60L fridge/freezer(not the dual compartment one)and a ctek dc-dc charger soon.What type battery(make and size)will be the most costeffiecient and what size solarpanel(specs) will be needed to run this fridge and maybe a few led light?

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  8. #268
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    BC1212-15, spec and installation sheet
    Attached Files Attached Files

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  9. #269
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    I have it with solar panels and it has a separate controller. Works well.
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  10. #270
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    Default DC2DC Portable Power Pack

    Just finished reading this - must say it took a while but gained lots of valuable info so thanks to all for the contributions...

    I'm thinking of building my own PPP that can be fastened in the back of my vehicle, or be removed and hooked up to solar panels when standing for a while, and think I'll go the DC2DC route.

    Based on what I've read thus far, I'm considering the attached DC2DC charger which seems to have all the "goodies" for a reasonable price (R1,125) i.e
    • 12VDC to 14VDC,
    • built in 180W Solar MPPC
    • Isolates Main from Aux
    • Load shedding


    Even though technically not needed, I'm also thinking of running thicker wires to the back to run the fridge during the "load shedding/charging cycle" as well as charge the Aux directly from the alternator in the event of some failure with the charger.

    All I would then need is the battery, solar panels and AC2DC charger for use at a site with 220V and to maintain the battery when not in use.

    As far as the battery is concerned, I'm leaning towards High Cycle as it seems they are cheaper and, if not run flat, which seemingly can be achieved with above setup, can last just as long as a Deep Cycle?

    I'm also looking for an affordable e.g. sub R1K AC2DC intelligent charger to use at sites with 220V but can also maintain the battery when stored.

    As the thread is fairly "old" any comments, suggestions, input would be appreciated, especially from those that have since had some experience with their own DC2DC systems.
    Attached Images Attached Images
    Last edited by DawieNel; 2013/08/22 at 01:50 PM. Reason: typo
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  11. #271
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    Must say this looks like a very nice option...
    http://www.hcdpelectronics.co.za/pri...rod=HPP1%20MK4
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    Quote Originally Posted by andreklopper View Post
    Must say this looks like a very nice option...
    http://www.hcdpelectronics.co.za/pri...rod=HPP1%20MK4
    Yes, but at nearly R4.5K excluding the optional inverter...

    To me it seems this panel has more or less the same spec as the DC2DC charger mentioned in my previous post thus one could build your own for probably less than half the cost of the complete panel?
    Last edited by DawieNel; 2013/08/21 at 04:55 PM.
    Dawie Nel

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  13. #273
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    Quote Originally Posted by DawieNel View Post
    Yes, but at nearly R4.5K excluding the optional inverter...

    To me it seems this panel has more or less the same spec as the DC2DC charger mentioned in my previous post thus one could build your own for probably less than half the cost of the complete panel?
    Yep it seems expensive.

    But go and buy all the bits and pieces, ACDC, DCDC, bypass system, case/box, digital meter, plugs sockets, breakers, wiring, connectors, etc etc. Build it yourself with no mishaps or problems.

    It's actually a bargain with a guarantee, even if you charge your labour at R0.00 per hour.

    EDIT - And a lot neater and more Proffesional and probably safer and more reliable than almost all DIY rats nests of wiring I have seen.
    Last edited by Fluffy; 2013/08/21 at 05:08 PM.
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  14. #274
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    Quote Originally Posted by Fluffy View Post
    Yep it seems expensive.

    But go and buy all the bits and pieces, ACDC, DCDC, bypass system, case/box, digital meter, plugs sockets, breakers, wiring, connectors, etc etc. Build it yourself with no mishaps or problems.

    It's actually a bargain with a guarantee, even if you charge your labour at R0.00 per hour.

    EDIT - And a lot neater and more Proffesional and probably safer and more reliable than almost all DIY rats nests of wiring I have seen.
    Perhaps I'm a bit naive however, as mentioned in my original post, I need a PPP and building a "junction box" similar to fourth photo of ChrisF in this thread http://www.4x4community.co.za/forum/...d.php?p=571657 using the DC2DC charger, which has most of the features as the panel (besides the ACDC charger), doesn't seem like rocket science and looks rather neat as well?
    Dawie Nel

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  15. #275
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    Dawie in those series of photos I used a Cole Hersey relay to switch/control the charging - photo 3.


    Photo 4 deals with "how" to distribute the power from the second battery (no relevance to the charging of the 2nd battery)



    since then I have also gone the Ctek 250 route, with 2 off 80W solar panels - now it really WORKS !!

    An alternator CANT charge a 2nd battery mounted at the back of a bakkie ! - it gets "close enough" for the typical long weekend trips, but it DROPS you when you are on the road for 2 to 3 weeks in SUMMER.


    please take my word for it - I DID pay the school fees ....

  16. #276
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    Talking

    Thanks Chris,

    As mentioned in my original post, I'm sold on the DC2DC solution however am simply considering this unit http://www.hcdpelectronics.co.za/pri...p?prod=DCDC12A in stead of the more expensive CTek unit.

    My reference to your pic was simply to illustrate how one could build a neat and safe DB box without having to spend a fortune...
    Last edited by DawieNel; 2013/08/22 at 01:49 PM.
    Dawie Nel

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  17. #277
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    Chris - I understand you cannot daisy chain 2 solar panels to the Ctek - Anyway round this one??

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  18. #278
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    Mistral my two panels are connected in parallel. I know that Fanatic also runs this setup, and a few others.

    The Ctek works PERFECTLY with these panels in parallel



    DAWIE - HCdP has some EXCELLENT products ! Pity they dont have a distribution setup in the Cape. They now have a dual input unit that limits the max charge current to 12A - bit slower, but I still believe BETTER for the battery in the long run (but thats a whole different debate )

  19. #279
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    Thanks Chris - Is there a forum post showing how to do this?

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  20. #280
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    Quote Originally Posted by Mistral View Post
    Thanks Chris - Is there a forum post showing how to do this?
    Ek wil ook weet?
    Dawie Nel

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