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  • Inverter - why is it a bad idea?

    Can someone explain to me why using an inverter for a car computer is a bad idea? One major advantage is that i could use the computers existing power supply and i could use the computer in my house when i wanted to. I have been told on several occassions that it is not a good way to go but i never really understood why.

    *EDIT* From my searching the forum the main problem seems to be noise. However I thought you could elminiate this with proper grounding.

    Thanks in advance,
    P.

  • #2
    Any converting circuit is not 100% effective, and using a inverter would give you this:

    12unregulated->110/230->12regulated->to psu->12,5,3.3 and so on

    instead of 12 unregulated->psu->12regulated->12,5,3.3
    -
    My cars
    -

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    • #3
      Originally posted by jol
      Any converting circuit is not 100% effective, and using a inverter would give you this:

      12unregulated->110/230->12regulated->to psu->12,5,3.3 and so on

      instead of 12 unregulated->psu->12regulated->12,5,3.3
      so whats wrong with that though? What you get out at the end is the same. I'm not saying you are wrong - just trying to understand what the downside is.
      P.

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      • #4
        Originally posted by phoTToniq
        so whats wrong with that though? What you get out at the end is the same. I'm not saying you are wrong - just trying to understand what the downside is.
        P.
        Basically less efficient, your battery will die quicker. Also your PC will reboot when you start your engine.

        GingerPrince

        Car changed for TVR Griffith 500, so computer de-installed. Using a Dension 100ix w/60Gb HD unit in the interim.

        Carputer Install - http://www.stuffandting.com/carputer/
        CarBox Software -- http://www.stuffandting.com/carbox/

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        • #5
          Originally posted by GingerPrince
          Also your PC will reboot when you start your engine.
          Not if your electrical system is working correctly...I have no reboots with mine.

          I don't mind using one myself. I think the idea of more wires, another thing to turn on, and the efficiency issue is what may turn people off.
          Aura MR62 (F and R)
          My Current MP3s
          IamDefiler.com

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          • #6
            I'm using a 600 watt inverter (filtered modified sine) and I'm not getting any noise and my PC doesn't reboot when I start my engine.

            I also like the fact that I have AC and can use other things in the vehicle. Using a DC power supply for your PC is good, but if you want to power AC things, you'd still need an inverter. That's why I went with the inverter, maybe not as efficient but definitely all around more useful IMO..

            Just my .2 cents...

            TiTUS

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            • #7
              I think what the post above is saying is that when the input voltage to the inverter varies (12-16v) the output also varies (~110-~130v for example) and your equipment may not like a varying voltage. I would think the output of the inverter would be regulated, but I am not sure...
              -AL
              * 2000 Ford Expedition
              * EPIA M10000/512 meg RAM, Win XP PRO, 90w OPUS, 80 gig HD
              * TM-710VGT LCD, Wireless mouse, keyboard
              * M-Audio Sound Card, 2 Alumapro 10" subs, 2 PPI Amps (1kW)

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              • #8
                Here's the specs for my inverter. Which seems to work very well. It does seem that the output voltage varies by about 10%.

                Superex Brand Name

                Max continuous Power = 600W
                Output surge = 1800W
                AC output = 115V plus/minus 10%
                no load current draw = <0.95A
                efficiency = 90%
                input voltage = 10 to 15 V
                low voltage alarm = 10.5 V
                low voltage shutdown = 10 V
                waveform = filtered modified sine wave

                TiTUS

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                • #9
                  Originally posted by phoTToniq
                  Can someone explain to me why using an inverter for a car computer is a bad idea? One major advantage is that i could use the computers existing power supply and i could use the computer in my house when i wanted to. I have been told on several occassions that it is not a good way to go but i never really understood why.

                  *EDIT* From my searching the forum the main problem seems to be noise. However I thought you could elminiate this with proper grounding.

                  Thanks in advance,
                  P.
                  They have one on sale at www.maplin.co.uk on the front page. It's 300w. What do you guys think of that one?

                  Comment


                  • #10
                    hmmm, I think using a inverter is a good, Cheep Way. Of course price goes up as the inverter power, and capabilities go up. Like Filtering. But Its more wires, and more heat, and makes the system bigger. I think a nice fat 4 Gauge power Wire, With a nice inline Fuse, would be a cleaner setup. and you can hook up a Remote wire ( like amps) to it, so when ur HU turns on, ur Carputer turns on. As Far As I know, inverters dont have that cabilities.

                    Im probly going to use a inverter when I start to build my carputer, at first. and ill enginer it out, later on.

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                    • #11
                      Originally posted by phoTToniq
                      Can someone explain to me why using an inverter for a car computer is a bad idea? One major advantage is that i could use the computers existing power supply and i could use the computer in my house when i wanted to. I have been told on several occassions that it is not a good way to go but i never really understood why.

                      *EDIT* From my searching the forum the main problem seems to be noise. However I thought you could elminiate this with proper grounding.

                      Thanks in advance,
                      P.

                      I currently have an inverter setup, and get minimal noise, I DO however want a regulated 12v Power setup. The reason I want this, is so that I can simply let my carputer go into a suspended standby mode and have minimal draw on the battery. When an inverter is on, it sucks the same large amount of power no matter what the load the computer is putting onto it, and therefore you battery will die just as quick whether in standby mode, or fully bogged down.
                      My OLD Carputer: http://www.mp3car.com/node/18137
                      Currently, Don't have a carputer :( I sold my lincoln and bought a '93 Acura Vigor, plan on putting a carputer in it one of these days. You can see my vigor at: This Site

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                      • #12
                        there is absolutely nothng wrong with using a dc-ac inverter. But make sure to get a good one, the one I had caused alot of static, evne if it was in the trunk.

                        Only problem is it draws more current, its bulky if that much. If you do like a relay to remote turn it on then your good to go.
                        Mine needs to be updated.

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