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What type of Inverter are you using?

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  • What type of Inverter are you using?

    Pure Sine Wave?

    or

    Modified Sine Wave?


    Do you see any advantages to either? I only ask because modified sine is much cheaper than pure, but pure is more efficient and less likely to have problems with the equipment it's running. Thanks!
    2004 WRX Carputer

  • #2
    Pure is better, give a smoother signal and will be less likely to cause noise. You may want to check into a DC-DC power supply though, as they are not much more money compared to a really high end inverter...
    CarPC install is starting to come along again...

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    • #3
      Using modified sine-wave here. Pure sine-wave inverters are basically like modified sine-wave inverters except the steps are chopped up at 20 KHz.

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      • #4
        Originally posted by Kermee
        Using modified sine-wave here. Pure sine-wave inverters are basically like modified sine-wave inverters except the steps are chopped up at 20 KHz.
        Um, my understanding was that a pure sine wave was a pure sine wave, and that a modified sine wave was a square wave with a step in it... am I wrong here?
        2004 WRX Carputer

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        • #5
          Im using a modified sine wave, yes pure is more expensive, modified is more cheaper. Try to find a cheap modified one that survives cranks and has enough watts for what you need. Mine does, but you may have to try a few - also some make more noise then others, so you might want to watch out for that too.
          CarComputer Status: New Car & Broken (Motherboard Fried)
          Owen JH | My Linux Blog | The Tech Fellows

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          • #6
            How bad is the noise? I've also heard you don't want to run high end electronics off a modified sine wave...
            2004 WRX Carputer

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            • #7
              I run a modified sine wave inverter. The only noise I get is in the power supply itself. It seems that the transformer doesn't enjoy the hard steps of the modified wave, creates a little buzz.
              2006 Chevy Colorado: VIA M10000 EDEN, 1 GB RAM, 80 GB 2.5" Seagate HDD, USB Slim Slot DVD/RW, Holux GPS, MobileVU 10.4" LCD (touch not working yet), VOOMPC Case (blue), 70W DC-DC supply.

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