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  1. #1
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    Default 75A breaker for Mecer Inverter - is it necessary?

    I have just invested (?) in a Mecer inverter (https://pclinkshop.co.za/ups-inverte...-ivr-2400lbks/). This will be used for loadshedding - TV, DStv, internet, a few lights etc (nothing really heavy).
    The guide that came with the unit indicates that I should put in a 75A breaker in the positive battery line. The dude at our local electrical place reckons this is not necessary.
    What is the view of the experts out there?
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  2. #2
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    Default Re: 75A breaker for Mecer Inverter - is it necessary?

    I have a 1500 w inverter and was always a little worried about the breaker so I picked up a 60 amp DC breaker from 4x4 Direct. Just for peace of mind.

  3. #3
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    Default Re: 75A breaker for Mecer Inverter - is it necessary?

    I dont have one installed. Batteries connected to inverter without a breaker. Use thick cables so that they dont get warm when drawing lots of current. Inverter has protection built in, its actually quite an intelligent piece of equipment for the price.
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  4. #4
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    Default Re: 75A breaker for Mecer Inverter - is it necessary?

    Quote Originally Posted by LandyLove View Post
    I dont have one installed. Batteries connected to inverter without a breaker. Use thick cables so that they dont get warm when drawing lots of current. Inverter has protection built in, its actually quite an intelligent piece of equipment for the price.
    Fine, except the fuse or breaker is not there to protect the Inverter, its there to protect the cable and the battery, which the Inverter cant do. Its also there to protect you from fire from the Inverter should the Inverter protection fail. (Inverter protection failing manifests itself as fire.)

    Fuses aren't there for overload, they are there for protection from failures.
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  6. #5
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    Default Re: 75A breaker for Mecer Inverter - is it necessary?

    Quote Originally Posted by dust-devil View Post
    I have just invested (?) in a Mecer inverter (https://pclinkshop.co.za/ups-inverte...-ivr-2400lbks/). This will be used for loadshedding - TV, DStv, internet, a few lights etc (nothing really heavy).
    The guide that came with the unit indicates that I should put in a 75A breaker in the positive battery line. The dude at our local electrical place reckons this is not necessary.
    What is the view of the experts out there?
    I would rather use a 100A fuse when using a 2400VA inverter running on 24V.

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