No, not the red button. Whenever you take power away and then re-energize a new GFI, it goes through a self test which won't work on a modified sine wave inverter. While you are providing power with the inverter, try and push the red test button and then try to reset. Supposedly, that is what you can't do with a modified sine wave inverter. Again, tjis is from Magnum tech not me.
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