Mecer Inverter and TV Psu noise





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  1. #1
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    Default Mecer Inverter and TV Psu noise

    Mate has a Mecer 1200va inverter (spec says simulated sine wave - not sure what that means vs MSW and PSW?).

    Anyways, he has an older LCD TV, and when running on inverter the TVís PSU makes a humming noise.

    Is this bad for the TV / inverter? Will something break?

  2. #2
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    Default Re: Mecer Inverter and TV Psu noise

    Quote Originally Posted by bees View Post
    Mate has a Mecer 1200va inverter (spec says simulated sine wave - not sure what that means vs MSW and PSW?).

    Anyways, he has an older LCD TV, and when running on inverter the TVís PSU makes a humming noise.

    Is this bad for the TV / inverter? Will something break?
    Here is what Sinetech says ... https://sinetech.co.za/select-inverter.html

    Modified Sinewave Inverter
    The Modified sinewave inverter has limitations. These are some of the appliances that may experience problems when running off Modified Sinewave inverters:


    • Laser printers, photocopiers, magneto-optical hard drives
    • Some fluorescent lights with standard ballasts
    • Power tools employing ďsolid stateĒ power or variable speed control
    • Some battery chargers for cordless tools
    • Sometimes produces interference in some television sets
    • Digital clocks with radios
    • Sewing machines with speed/microprocessor control
    • Medical equipment such as oxygen concentrators

    Modified sinewave inverters are usually only protected by standard fuses which, under normal circumstances, are not always fast enough, therefore they are by far more vulnerable to failure.
    It is definitely advantageous to use a pure sinewave inverter as a pure sinewave inverter can basically run any type of equipment in contrast to a modified sinewave / step square wave inverter.
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  4. #3
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    Default Re: Mecer Inverter and TV Psu noise

    Quote Originally Posted by bees View Post
    Mate has a Mecer 1200va inverter (spec says simulated sine wave - not sure what that means vs MSW and PSW?).

    Anyways, he has an older LCD TV, and when running on inverter the TVís PSU makes a humming noise.

    Is this bad for the TV / inverter? Will something break?
    Yes it is bad for the TV. Older TV sets had very poorly designed power supplies.

    Also see post #2 above.
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