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Thread: 24V to 12V converter switched power source?

  1. #1

    Default 24V to 12V converter switched power source?

    I'm putting a converter in to run some 12V stuff, wiper motors probably, some LED lights, blower motor...

    It wants a switched 24+ source. I can't decide between wiring it to the ignition switch or running it off the batteries with a separate switch of its own. Could the ignition switch (I have a 'keyed' replacement) handle a 30A converter? It would be nice to not have a second switch.

    No, it didn't come with instructions, but there is a spec sheet online. Yes, I did read the GIANT 24-12 dual charging systems thread. It made my whole head hurt, but didn't discuss the converter power source.

    Thoughts? Facts? WAGs?

    Thanks!
    1968 M-715 w/1100R16s on Stockton wheels, H3 headlights, 2bbl upgrade...

  2. #2

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    The ignition switch won't handle 30A. You need to put in a relay that is operated by the ignition switch.

  3. #3

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    Quote Originally Posted by kwai View Post
    The ignition switch won't handle 30A. You need to put in a relay that is operated by the ignition switch.
    Oh yeah! That was the third option I forgot about! And apparently the correct one. So any 24V N.O. relay? Like a starter solenoid?

    Sent from my moto x4 using Tapatalk
    1968 M-715 w/1100R16s on Stockton wheels, H3 headlights, 2bbl upgrade...

  4. #4

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    You want a relay that has a 100% duty cycle. Most starter solenoids are intermittent duty.

  5. #5

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    Quote Originally Posted by kwai View Post
    You want a relay that has a 100% duty cycle. Most starter solenoids are intermittent duty.
    I've been researching some relays. I noticed that those solenoids are about 10x or more overkill on the amps. I didn't think about the duty cycle being so short on them though.
    I think I have settled on a relay to try, I'll try to find out if it actually says continuous duty in the specs before I order some.
    Thanks kwai! I'm going in the right direction now. I think.

    Sent from my moto x4 using Tapatalk
    1968 M-715 w/1100R16s on Stockton wheels, H3 headlights, 2bbl upgrade...

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