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!

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

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Originally Posted by kwai

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

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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?

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

Quote:

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Originally Posted by kwai

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

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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. [emoji4]

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