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Thread: Easily adapted UPS PSU for auto applications

  1. #1
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    Post Easily adapted UPS PSU for auto applications

    After spending months looking for a suitable solution to power my beast and finally settling for an inverter, I find this ups/psu which with v little effort could have done the job in a single package.

    check it out (about half way down the page)
    http://www.bullnet.co.uk/shops/test/batterie.htm


    conditioning and all the tap you need for 29

    Twin

  2. #2
    FLAC
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    Red face

    ooouuucchhhh...look at the size of that thing...ouch!
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  3. #3
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    yes it is very large! but would it work? by running power from the cars battery to the internal batteries, could that be used as a dc-dc psu? along with aux battery? or even ditching the internal batteries, and running that off the main battery?

    any ideas?? comments?
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  4. #4
    Retired Admin Aaron Cake's Avatar
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    Cool

    I'd loose the internal batteries and connect the car battery instead. Sounds like a good idea for a cheap DC-DC.
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  5. #5
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    It could work, but maybe not. I've tried the same thing with my UPS (connecting it to a car battery), and while it did function, it turned off after a few minutes because it was overheating. I added heat sinks to all the components that seemed to be really hot and that bought me a few extra minutes, but it still didn't last that long. My UPS just wasn't built to be on for that much time, and you never know if this one was, either. Though, this looks like it doesn't do any inversion because the batteries are at the same voltage as what it's outputting, so maybe it wouldn't overheat and could run for a long time without any problems. You might want to call them up or send them an e-mail, or something. Though, you might not, because that might damage your chances of getting it replaced when it breaks

  6. #6
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    Maybe the overheating was due to the fact that your alt puts out ~13.8V instead of the 12V required by the UPS? Would that be a problem? Does seem like a cool solution...looks like an ATX power connector on there too...200 Watt ATX DC-DC for ~$40 ...not too shabby. only problem is that shipping to the us is ~125
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  7. #7
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    I thought UPS put out 120VAC from a 12V battery or are you guys talking about a different UPS?
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  8. #8
    Raw Wave wizardPC's Avatar
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    they are talking about something different (i thought that too, then I looked at it)

    Its actually a power supply with big batteries in it, so when the AC is cut it runs directly from the 12V batteries INSIDE the power supply--no inversion. but its HUGE
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  9. #9
    FLAC
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    well ok i got it now.... atx PSU + UPS together...
    for me is back to Jeff's mini DC-DC ATX seems the way to go.
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