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Thread: 300watt inverter, 700va ups and a 90watt powersupply?

  1. #1
    Low Bitrate MikeXP's Avatar
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    300watt inverter, 700va ups and a 90watt powersupply?

    Hey all,

    As a student I don't have heaps of money to get my CarPC up and running so I decided on this setup, I already have a 300watt inverter for the car I got as a gift and I have a spare 700va UPS.

    My CarPC has a 90watt powersupply, and it only draws about 70watts, So if I had this setup...

    Car Power ----> Inverter 300watt -----> UPS 700va ------> CarPC 90watt

    Would it work? I want the UPS in there so that when the inverter looses power from me turning the ignition to off the UPS will shut down the CarPC safely

    The only concern I have is the UPS overloading the inverter as it is a 700va UPS, but I think that the CarPC only drawing about 70 watts, the UPS should only draw around about the same wattage.
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  2. #2
    Variable Bitrate RS3RS's Avatar
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    Just keep in mind you'll have to wire an on/off switch to the UPS, as it won't turn off automatically when power is cut to it. This means a constant, annoying beeping when power is off, plus it will drain its battery. UPS batteries aren't designed to be drained/recharged more than a few times, and the battery will probably die pretty quickly.

    As long as you can extend the UPS's on/off switch to where you can easily reach it and switch it on/off every time you turn off/on your car, I don't see a problem with it. In fact, that would be a good way to make sure your carputer can survive cranks

  3. #3
    Low Bitrate MikeXP's Avatar
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    The UPS I have got I took the beeper out of it to stop the beeping noise and the software that came with it first shuts down the computer, then when the computer is off it turns off the ups But yes I will still need a switch to turn the UPS back on which in turn will turn the computer back on also

    And yep it will be great for making the comp work through cranks, I never thought of that acctually!
    [ MP3CarPC.com :: Digitize your in-car experience ]

    * what happened to my sig and avatar :confused: *

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