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  1. #1
    Phil1958's Avatar
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    Cool Inverter Generators

    had these two beauties put on a pallet from china. the big one is a 3kW 120/250vac
    electric start inverter and the smaller one is 2kW 120 vac pull start inverter. they
    used to be known as the brand name 'earthquake'. that brand no longer imports them.

    20170411_084617.jpg
    Giddy Up!

  2. #2
    Senior Member MB165's Avatar
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    Inverter generators are really neat, I like how they use the flywheel as the rotor, stepper motor speed controller, and stable frequency, a good compact design. might not be a bad idea to get some spare regulators for them...

  3. #3
    Phil1958's Avatar
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    20170412_144052[1].jpg

    the little one showed up today.
    Giddy Up!

  4. #4
    chipper's Avatar
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    Nice , I love my EU3000 !

  5. #5
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    Quote Originally Posted by Phil1958 View Post
    20170412_144052[1].jpg

    the little one showed up today.
    What is the power rating on the small one? Are they expensive?

    I'm happy with my tri fuel $199 3.6KW Black Max. Will back me up when I need it.
    Last edited by SAS289; 04-28-2017 at 03:53 PM.

  6. #6
    Phil1958's Avatar
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    the small inverter runs 600 watts continuously with short 800 watt surges.

    they sell similar things here on omb. i'm just an importer.
    Giddy Up!

  7. #7
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    i need to pick myself one of these up soon, camping season is coming.

  8. #8
    RobertC's Avatar
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    So Phil....fill me in... ...for you, what's the benefit of these guys over a regular old generator?

    I know I can google it, I'd just like to hear the scoop from someone I know.

    Thanks,

    Robert

  9. #9
    Phil1958's Avatar
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    inverter generators have a gasoline engine turning a dc generator whose output
    is smoothed or an ac generator whose output is rectified and smoothed to dc. an electronic
    inverter circuit takes the dc and chops it up to form a psuedo-sin wave ac output, this output
    is further filtered to produce a very good pure sin wave. the output load is monitored
    by a controller. the controller varies the speed of the gasoline engine so that the
    energy output of the generator matches that of the load instead of the motor running
    at high speed all the time. the output frequency is control by electronics and not the
    speed of the gas engine.

    regular generators need to run at a constant rpm so you always get 60Hz out of them.
    when you apply a load the engine immediately slows a bit, dropping the output frequency,
    while waiting for the speed governor to catch up the rpm.

    inverters are thought to be more fuel efficient than regular generators because their
    standing losses (the losses incurred while NOT driving a load) are significantly less
    because they are not running the motor at full speed all the time.

    both have voltage recovery issues when applying or removing loads. the inverter can
    store energy in a capacitor and use that stored energy to recover faster than a gasoline engine
    can recover. they both have benefits and downfalls. under heavy continuous loads the
    standard generator has less loss for example because it is turning engine work into energy
    that goes straight to the load whereas the inverter takes rotational energy turns it into dc,
    then into ac so it can have higher losses.

    hows that??
    Last edited by Phil1958; 04-30-2017 at 06:35 AM. Reason: typo's
    Giddy Up!

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  11. #10
    RobertC's Avatar
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    Cool, thank you Phil....

    Sounds like I'm still okay with my regular generator, as I use it primarily for running the air conditioner in the camper van when camping without electric hookups. The air cycles on an off, but typically is running full blast when it's hot outside during the day.

 

 

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