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Thread: Fuse with Inverter?

  1. #1
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    Question Fuse with Inverter?

    Hey guys,

    I was wondering what size fuse should I put inline from the inverter to the battery? It's a 375 WATT Inverter.

  2. #2
    FLAC Chairboy's Avatar
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    Better question, what gauge wire runs from the battery to the inverter? The wire size is a better indicator of what type of fuse to put in. At 375 watts, you're looking at over 30 amps, but you want a. a margin of error and b. to match it to the wire thickness and length.

  3. #3
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    Quote Originally Posted by Chairboy
    Better question, what gauge wire runs from the battery to the inverter? The wire size is a better indicator of what type of fuse to put in. At 375 watts, you're looking at over 30 amps, but you want a. a margin of error and b. to match it to the wire thickness and length.

    Hmm, I always thought it was the power you are drawing to determine the size of the fuse. Anyway, going to use an 8 guage wire I imagine. Also, it's going to run the length of the car to the trunk...So I think about 15 feet.

  4. #4
    FLAC Chairboy's Avatar
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    For 15 feet, I think 8 gauge will be borderline for your 30+ amp draw, but it might be ok. At 15 feet, 8 gauge is rated at 30 amps. At 10 feet, it's rated at 40, so it depends on how much you actually use.

  5. #5
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    Quote Originally Posted by Chairboy
    For 15 feet, I think 8 gauge will be borderline for your 30+ amp draw, but it might be ok. At 15 feet, 8 gauge is rated at 30 amps. At 10 feet, it's rated at 40, so it depends on how much you actually use.

    So should I do like 6 Guage or something? What I don't get is that if the draw is that much, than why do they put dinky *** wires on the end that is supposed to draw out of the cigarette lighter? Won't this not make sense when the wire gets tiny when the bigger guage wire gets to the inverter?

    Actually come to think of it, why would they even allow a connection to be made through a cigarette lighter in the first place when there is potential for damage? This does not seem like a product that would last very long on the market.

  6. #6
    Variable Bitrate lawrence's Avatar
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    i think the question was fuse size ---check what the inverter came with when it was new
    if you cant tell this link may help https://gullfoss2.fcc.gov/prod/oet/c...ericSearch.cfm

    just insert fcc id code from the back of the unit to find out who built it --and sometime thay have specs for the item

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