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Thread: Power Supply for Basic Carputer

  1. #11
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    Okay guys, that sounds good. Thank you for all of your help!

    Now I just have to decide what gauge wire I will use!

  2. #12
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    Well how much are you powering off of it? If you're running 300 watts from your engine, you could go with 8-gauge and still have room for expansion. If you go farther than say 14 feet, you should upgrade to a 4-gauge.

  3. #13
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    300 Watts. My grandpa thought I should get a 10-14 gauge wire, but I thought I should get an expert opinion. It's just going from the battery to the wire, so not a very great distance.

  4. #14
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    Honestly, the inverter approach is never going to work well. You'd be far better off getting an actual CarPC Power Supply, that would handle the startup and shutdown of the PC for you. Worth the money, IMO.

    And CarPC's aren't ever the 'cheap' way of doing something...
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  5. #15
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    Quote Originally Posted by Sonsum View Post
    300 Watts. My grandpa thought I should get a 10-14 gauge wire, but I thought I should get an expert opinion. It's just going from the battery to the wire, so not a very great distance.
    10-14 gauge would work dandy if the voltage was higher - like 120 volts. The lower voltage in the car means you need larger gauge wire.
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  6. #16
    Vendor - Qube colin's Avatar
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    Agreed. Assuming your inverter is rated at 300 watts, that's not an RMS so 10 gauge could work. It's ALWAYS better to play it safe with electronics though, so I would recommend 8 gauge as your minimum requirement. 8 gauge is sorta cheap too

  7. #17
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    Quote Originally Posted by colin View Post
    Agreed. Assuming your inverter is rated at 300 watts, that's not an RMS so 10 gauge could work. It's ALWAYS better to play it safe with electronics though, so I would recommend 8 gauge as your minimum requirement. 8 gauge is sorta cheap too
    Uh.. perhaps you are thinking of amplifiers? In a DC power supply application you generally don't look at RMS. That being said, your wire values aren't incorrect. If the inverter is rated at 300w continuous (Let's assume it is, for safeties sake), then you need a wire that is capable of supporting that. At 12v, that's 25amps. 10 gauge would work, 8 is overkill for that level of power, but it never hurts to overkill.

    And as mentioned before, don't forget the fuse properly to your wire size unless you want your car to catch on fire... and cars burn quite nicely
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  8. #18
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    You guys are all the best! Thanks for all of your help!

    I'll try and post pictures of it when I'm done!

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