Help - 24V, 12V, Solar - Page 2




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  1. #21
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    Default Re: Help - 24V, 12V, Solar

    Quote Originally Posted by Dungbeetle View Post
    I see no issue.

    Like I said, by no means a the cleanest solution, but it will work.
    Ooooh.

    The problem is that we have things in series. So for you to get 20A to go into your added aux battery which is effectively in parallel with one of the vehicles two 12V batteries, the other battery is now effectively in series and 20A has to flow through it.

    Now if your aux battery is flat, and the vehicles batteries are full, you are going to destroy the vehicles battery. Forcing a high current thru a fully charged battery is never a good idea.
    Cheers

    ZS5KAD
    3 V8's
    A V6 and an inline 4

    The frogs are starting to notice that the water is getting warm but it is already too hot to do anything about it.....

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  3. #22
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    Default Re: Help - 24V, 12V, Solar

    We learn on this forum...

    Back to this then:

    https://www.hcdpelectronics.co.za/in...ories&catID=57
    2000 Patrol GU 4.2D(onkey) beyond 818 000 km

  4. #23
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    Default Re: Help - 24V, 12V, Solar

    Last edited by Dungbeetle; 2018/09/28 at 04:49 PM. Reason: wrong link
    2000 Patrol GU 4.2D(onkey) beyond 818 000 km

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  6. #24
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    Default Re: Help - 24V, 12V, Solar

    Quote Originally Posted by Dungbeetle View Post
    None of those options are even in the remotest way a good option, I'm sorry, it is what it is, I'm sorry.
    Cheers

    ZS5KAD
    3 V8's
    A V6 and an inline 4

    The frogs are starting to notice that the water is getting warm but it is already too hot to do anything about it.....

  7. The Following User Says Thank You to Fluffy For This Useful Post:


  8. #25
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    Default Re: Help - 24V, 12V, Solar

    Quote Originally Posted by Fluffy View Post
    None of those options are even in the remotest way a good option, I'm sorry, it is what it is, I'm sorry.
    Thanks.
    What would be better/proper options except a very expensive system....


    What about this:
    https://www.acdc.co.za/pages/all-pro...JwcmljZSI6W119
    Last edited by Dungbeetle; 2018/09/29 at 07:11 AM.
    2000 Patrol GU 4.2D(onkey) beyond 818 000 km

  9. #26
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    Default Re: Help - 24V, 12V, Solar

    Quote Originally Posted by Dungbeetle View Post
    Thanks.
    What would be better/proper options except a very expensive system....


    What about this:
    https://www.acdc.co.za/pages/all-pro...JwcmljZSI6W119
    All your options will work to a degree, but with some compromises.

    First compromise, which can be mitigated with a simple switch, is that there is no automatic isolation of the aux system from the main system. It stays permanently connected and we have a risk of running the crank batteries flat.

    The second problem is that all the products you mention are power supplies, not chargers. Again this can be mitigated by simply setting an output Voltage of say 13.8V, which may or may not be adequate, depending on the consumption profile.
    Last edited by Fluffy; 2018/09/29 at 10:08 AM.
    Cheers

    ZS5KAD
    3 V8's
    A V6 and an inline 4

    The frogs are starting to notice that the water is getting warm but it is already too hot to do anything about it.....

  10. #27
    Join Date
    Oct 2013
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    Default Re: Help - 24V, 12V, Solar

    Quote Originally Posted by Fluffy View Post
    None of those options are even in the remotest way a good option, I'm sorry, it is what it is, I'm sorry.
    Based on some workable solutions I would have installed 2 voltmeters to check to 2x12V batteries in the truck. With a manual switch I would switch between the 2 batteries to draw a load and keep all my 12V equipment.

    I would use 2x12V battery protectors to limit each 12V battery not to discharge below 12V and that would be the cut-off point to prevent them not being able to start.

    Then came along a more costly solution to keep both the truck batteries at the same level. https://www.hcdpelectronics.co.za/in...ories&catID=57 May

    Thanks Dungbeetle for pointing out that such a device is available. May be one can then use a solar panel to charge one of the 12V batteries and let the hcduprees unit ensure both are charged to the same level.

    May be management of the 2 batteries is what is required.

    Any drawbacks of the above?

  11. #28
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    Friemersheim, Southern Cape
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    Default Re: Help - 24V, 12V, Solar

    <<Confucius said>>
    Life is really simple, but we insist on making it complicated.
    I have to smile silently.....


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