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Quick Inverter watts/fuse question

Discussion in 'Ask An Owner Operator' started by dztruck, Mar 16, 2020.

  1. Mar 16, 2020 #1
    dztruck

    dztruck Light Load Member

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    Feb 22, 2017
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    Hi guys, im getting a 3000w pure sine wave inverter in the truck finally. What size fuse is recommended? Ive heard 10% of the max watts. So 300amps should be ok.

    the other question i have is the the inverter says 6000w peak surge. Does that mean it will blow a fuse if it has to surge for somethhing? Would that mean i would need a 600amps? Sorry if its a dumb question i havent installed an inverter before. Thanks. Be safe.
     
    dztruck, Mar 16, 2020
    dztruck, Mar 16, 2020
    #1
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  3. Mar 16, 2020 #2
    HoneyBadger67

    HoneyBadger67 Road Train Member

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    'Peak surge' is when you start an electric motor that requires more power to start than run. For the longevity of your inverter, you should probably never come close to the peak. Try to keep all of your appliances to around 2500w total to allow room for startup if you run more than one at a time. Your refrigerator and/or toaster oven are two appliances that require more power to start than run.
     
    HoneyBadger67, Mar 16, 2020
    HoneyBadger67, Mar 16, 2020
    #2
    86scotty Thanks this.
  4. Mar 16, 2020 #3
    Ridgeline

    Ridgeline Road Train Member

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    Inductive loads don't have a startup current as does motors and microwaves.
     
    Ridgeline, Mar 16, 2020
    Ridgeline, Mar 16, 2020
    #3
    HoneyBadger67 Thanks this.
  5. Mar 17, 2020 #4
    Wombat63

    Wombat63 Light Load Member

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    Nov 3, 2018
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    I installed a 3000W pure sine inverter in my truck over a year ago and have been using a 500amp fuse, haven't had any issues with it. I run a dorm size fridge freezer, microwave, TV, heated blanket, coffee maker -- obviously not at the same time -... the only thing I do is I have my fridge plugged into a surge bar with an on/off switch and when I'm using the coffee maker I turn the fridge off while its brewing, (It could probably handle without turning it off) just in case it cycles while the coffee pot is brewing.
     
    Wombat63, Mar 17, 2020
    Wombat63, Mar 17, 2020
    #4
  7. Mar 18, 2020 #5
    abyliks

    abyliks Road Train Member

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    ludlow MA
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    I have a 250w circus breaker mounted in the battery box
     
    abyliks, Mar 18, 2020
    abyliks, Mar 18, 2020
    #5
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