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  • Power inverter problem.

    I just bought a 700 watt power inverter. I have a 500 watt power supply for my computer. I ran one 8 guage wire to thebattery and i grounded another 8 guage to the chassis of the vehicle. Anyways i turn on the power inverter then i try to turn on the power supply for the computer and the little red light starts blinking and the power supply doesnt turn on. I then connected a much smaller 200 watt power supply and it worked fine. My question is do i need to use bigger wires or is my power inverter messed up? Also should i have a fuse on the line going from the battery to the power inverter? By the way i know 500 watt power supply works because tested it in my house. Thanks in advance for your help.
    05 Str8 Black XB

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  • #2
    you should always fuse anything coming off the battery
    Dr. Ron Paul for President 2008

    Hope for America - http://www.ronpaul2008.com

    Who is Ron Paul? - Why do we need Ron Paul?

    __________________
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    • #3
      The first thing you need to do is fuse the battery wire. Once you've taken care of that, break the ground prong off the a/c power cable you're using between the inverter and power supply and your problems will probably go away.

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      • #4
        Originally posted by numbers
        The first thing you need to do is fuse the battery wire.
        Indeed. Try to keep it as close to the battery as possible too (a few inches away if possible).

        Originally posted by numbers
        break the ground prong off the a/c power cable you're using between the inverter and power supply and your problems will probably go away.
        Yeah that's smart.

        Is the inverter 700 continuous or peak? Sounds like it's not drawing enough power. Is your car running at the time? Try some 4 Guage wire with the inverter right next to the battery and check it.

        -arebelspy
        See my trades here! My For Sale/Trade Thread. Email joe at eipse.com
        Originally posted by xdjxklusivex
        i think every thread is now a whoreing thread

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        • #5
          its 700 continuous
          my car was running at the time when i tested it.
          05 Str8 Black XB

          Check out my project so far!!
          http://www.mp3car.com/vbulletin/showthread.php?t=61194

          Check out some other picks of my car!!
          http://www.cardomain.com/ride/751014

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          • #6
            It still sounds like you are just not drawing enough power.. try plugging something smaller in, like a desk lamp, and see if that works.

            -arebelspy
            See my trades here! My For Sale/Trade Thread. Email joe at eipse.com
            Originally posted by xdjxklusivex
            i think every thread is now a whoreing thread

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            • #7
              yea problem is probably in the 8ga wire.... i have a 750w peak inverter before, and it was probably pushin it using the 8ga i used, with the 700w continuous id bump that wire size up some.... and just wondering, but do you need the 500w supply or can u go with something lower, only asking because lower the less drain on the battery, but if you're like me then u actually need that power
              Debating on installing a carpc in my Jeep.....

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              • #8
                Sounds to me like you didn't break off the ground prong yet.

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                • #9
                  WTF don't break off the ground prong, it's there for a reason!

                  -arebelspy
                  See my trades here! My For Sale/Trade Thread. Email joe at eipse.com
                  Originally posted by xdjxklusivex
                  i think every thread is now a whoreing thread

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                  • #10
                    Try to keep the opinions to a minimum. I won't say it a third time. Ok... yes I will. BREAK OFF THE DAMN PRONG. I really won't say it a fourth time, though. It's been said plenty of other times. Search the board.

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                    • #11
                      http://www.mp3car.com/vbulletin/show...t=ground+prong
                      Dr. Ron Paul for President 2008

                      Hope for America - http://www.ronpaul2008.com

                      Who is Ron Paul? - Why do we need Ron Paul?

                      __________________
                      CarPC Newbs Start Here: All your questions answered, as if by E.S.P.

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                      • #12
                        I can say that this does work.

                        I have never got to the truth of why, but it does.

                        IE, inverter case is ground, ground pin on inverters 3 pin AC socket is connected to inverter case, hence ground.

                        PC cable ground pin is connected to PC case which is ground.

                        But with the ground pin on the plug connected it scares some inverters into fault mode.

                        Its weird, got to be a loop/impedence/standing wave issue, but damned if I can visualise how it happens.
                        Lez, more widely known as flez1966

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                        • #13
                          after reading what others have said about the removing the groung prong i will definitely go ahead and do that. How do i go about removing the ground prong?
                          05 Str8 Black XB

                          Check out my project so far!!
                          http://www.mp3car.com/vbulletin/showthread.php?t=61194

                          Check out some other picks of my car!!
                          http://www.cardomain.com/ride/751014

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                          • #14
                            Ok i did it then i tried it out and it worked perfectly. Numbers i am so very sorry for doubting you. Thanks a lot for your help.
                            05 Str8 Black XB

                            Check out my project so far!!
                            http://www.mp3car.com/vbulletin/showthread.php?t=61194

                            Check out some other picks of my car!!
                            http://www.cardomain.com/ride/751014

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