1. International2020

    International2020 Bobtail Member

    41
    9
    Dec 17, 2023
    South Carolina
    0
    OK, so does anybody have any ideas? What the problem could be with my inverter? I’ve already swapped out for a new inverter I’ve even got temporary cables to wire up to try to see if it was the cables and the batteries are less than a year old, but the inverter is only getting 11 1/2 V. The truck shows. I’m getting 14 V when it’s running so does anybody have any idea what the issue could be because I don’t know anything else at this point
     
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  3. beastr123

    beastr123 Road Train Member

    2,661
    21,784
    Jan 2, 2014
    Moose Jaw SK CAN
    0
    Where is it connected to the trucks electrical system and what gauge of wire is connecting it?
    No inverter over 500w should be plugged into a cig lighter outlet or connected with less than #12 wire. Up to 1500w can function reliably with #8 wire. Anything larger should be connected directly to the battery box with minimum #4 cable and fused at the battery box. All connections over 10ft wire run go to the next size larger wire/cable.
    Also clean your battery terminals and ground connections at least twice per year (I did mine the weekend of the solstices) the dash gauge reads alternator output not battery condition while running, it reads battery output with key on not running only. 13.8v to 14.2v is standard alternator output, 12.4v to 12.8v is battery condition not running. Any not running reading less than 12.1v is normally due to poor battery condition or poor connection.
     
    Last edited: Apr 29, 2024
    Tb0n3 Thanks this.
  4. International2020

    International2020 Bobtail Member

    41
    9
    Dec 17, 2023
    South Carolina
    0
    Yeah, it’s all connected directly to the battery and I have zero gauge wire I believe and it’s only running a few feet but yeah, I mean I’ll check the battery gauge without the truck running and see what it says but these batteries are less than a year old
     
  5. International2020

    International2020 Bobtail Member

    41
    9
    Dec 17, 2023
    South Carolina
    0
    That’s without the truck running
    image.jpg
     
  6. microtrucker

    microtrucker Bobtail Member

    8
    0
    May 9, 2024
    0
    ok you need your inverter hooked up with one wire on one battery and the other on the battery beside it. no it will not give you 24 volts as you have a bus bar on all your batterys to run them together to give you 12 volts. things is the only reason your getting 11.5 volts on the inverter is you got it wired to one battery thats not how it works. it has to run off the system to work. do not run your inverter without a apu or the truck running. it will ruin your system batterys included. zero gauge wire is fine. problem is how you have it wired in
     
  7. International2020

    International2020 Bobtail Member

    41
    9
    Dec 17, 2023
    South Carolina
    0
    So I got it fixed. The issue was I had bad batteries two batteries were dead and two needed recharging.
     
    Iamoverit Thanks this.
  8. International2020

    International2020 Bobtail Member

    41
    9
    Dec 17, 2023
    South Carolina
    0
    Nvm I did not fix it. Worked fine till I went to go use my skillet now it’s doing low dc output again I’m getting really annoyed. Any other ideas. Literally everything has been ####ing changed out now
     
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  9. uncleal13

    uncleal13 Road Train Member

    3,776
    6,236
    Apr 9, 2009
    Humboldt, Sk
    0
    What is the inverter rated at?
    How many watts?
     
  10. International2020

    International2020 Bobtail Member

    41
    9
    Dec 17, 2023
    South Carolina
    0
    2000 pure sine
     
  11. uncleal13

    uncleal13 Road Train Member

    3,776
    6,236
    Apr 9, 2009
    Humboldt, Sk
    0
    Should be big enough to power anything you can plug into it.
    Two things I have experienced with lower voltages than expected:
    - alternator had burnt rectifier on one of the phases, it seemed to put out proper voltages at low loads. When a heavier load was applied (my microwave or all the lights at night) then it showed low voltage.
    - bad cable or crimped lug, wire had an oxide coating on it that insulated the copper from making a good contact with the lug that was crimped onto it.
     
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