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I can not find consistently on the internet where to find the THD info on Perdator 9000w generator I now have. I have found <5% and <23%. My graph looks closer to 5%, but again, I don't know what I'm talking about.
I did not want to thread jack any current generator threads, but I'm unable to find the information I want.
I have a basic oscilloscope meter and can visualize a sine wave, but I don't know to do with what I see other than some waves look smoother than others.
Back Story
Last year I had to buy a new generator as mine went out during a storm and power was out for several days. I had a 8500w Onan that served me well over the last 12 years that I plug into a power transfer switch box in my garage. My wife requires power for some of her medical equipment (backup batteries only last so long) so waiting for parts/repair was not an option. The only generator that was in stock with in 50+ miles was a Harbor Freight 9000w Predator.
12 years ago I never heard of "clean" power and that was not a consideration. Now, with all my electronics, I'm a little more worried about it. The Predator seems to generate cleaner/more stable power based on the amount of "beeps" I get from my APC UPSs compared to my Onan generator.
Just some data samples I have collected.
My camping 12v inverter.
Wall outlet on PG&E power.
9000w Predator at 20% load.
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