Generators and Computers

Discussion in 'Homesteading Questions' started by bare, Dec 26, 2006.

  1. bare

    bare Head Muderator

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    Maybe I've been operating under the wrong assumption, so I'm hoping someone can correct me if I'm wrong.

    Somewhere along the line I thought I read that I was safe using my computer, powered by a generator, as long as it was run through my UPS. In other words, just plug my UPS into an extension cord run directly to my generator.

    Seems to be a very cheap alternative to owning a true sine-wave inverter for my sensitive electronic equipment.
     
  2. BackwoodsIdaho

    BackwoodsIdaho Well-Known Member

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    The problem is that the UPS is not correcting the waveform into a full sine wave, it stays as modified square wave unless you have a true sine inverter. The question is the generator - how clean is the power and have true is the sine wave coming off of it. If your invertor is running shore power, it just passes it along.

    I am just saying what I understand to be the case. I have always had a true sine wave invertor chosing to have a more costly and less efficient invertor since we run our washer (which doesn't like a modifed sine wave) and computers.

    That said, I still think you can run your computer on a modified sine wave if you have a UPS/Surge protector. The main thing is that the clock may be off but you can use a internet time server to update it regularly



     

  3. mightybooboo

    mightybooboo Well-Known Member

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    You do Not need to run your genny thru a UPS to power a computer,direct connect works fine.

    Computers will run on very dirty power,the power supplies in them are pretty trashy.

    Anything that runs with a digital clock will NOT run on modified sine wave.Virtually all UPS are modified sine wave with a few more costly exceptions.

    I was surprised they DO make pure sine wave UPS's ,someone addressed that in Alt Energy section once.

    Laser printer require sine wave,but I dont have one so personally cant swear to it.

    All I can see a UPS doing for you is protecting from either surges if so equipped,or protecting against low voltage,which really doesnt hurt the actual computer.Their in tower power supplies can operate across a very wide voltage range of AC and still put out the correct DC voltages required(Also addressed in the past on Alt Energy board I believe).

    How that would affect the monitor (low voltage) I dont know.

    I do know some monitors buzz on mod sine wave,my Samsung LCD does.

    BooBoo :gromit:
     
  4. mightybooboo

    mightybooboo Well-Known Member

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    What he said,AFAIK thats 100% correct.

    BooBoo :gromit:
     
  5. tnhomestead

    tnhomestead Well-Known Member

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    Been running multiple computers for years now on modified sine wave inverters, both home and in the semi. I have never had a problem yet from power, But it might happen. I do use a internet clock to update time, but have always done that even in the store! Right now have run the home puters off 3 different generators and 5 or 6 inverters never a problem yet, and my coleman inverter will pay if they blow up something u plug in. I cant afford the true sine wave, want one down the road, byt so far 3 yrs off grid and 10 plus yrs in the semi with zero problems
     
  6. sisterpine

    sisterpine Goshen Farm Supporter

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    Been running two computers, printers etc off a modified sinewave heart freedom inverter for the past 4 years. No trouble yet. In fact the only wave issue we have ever had is that we cannot get good AM radio signal since we got the inverter!
     
  7. mightybooboo

    mightybooboo Well-Known Member

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    Is that a laser printer? I have a Heart 458 also.
    Inkjet runs fine.

    BooBoo