I've run into this a few times on generator power. WIth Magnum inverters,
but when the generator is running, the waveform and frequency is whatever
the generator is producing, so it doesn't really matter what the inverter
is in most cases. In one case, the generator frequency was sagging to 47
Hz ("high quality" harbor freight generator), and that tripped every
GFCI/AFCI breaker in the panel.
It could also potentially be due to ground loops and stray current on
equipement grounds, not frequency or waveform at all... does the generator
have an isolated neutral? Or is the neutral and ground bonded in the
generator in addition to the main panel? I know that having multiple
neutral ground bonds really messes up a lot of the AIO inverters, which are
more sensitive. The old transformer based inverters didn't really care
about current on the ground that much... but GFI's definitely do.
Zeke
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