Pure sine wave is nice, but not necessary. Ourselves, and many others, run Samsung on modified sine with no issues. The Samsung "drive" system is a variable speed motor. They take the AC in, converter it to DC, and then convert that to a variable frequency motor drive, most likely square wave anyway. The other AC operated gizmos don't care.
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Jim (NQ5L) & Chris
2007 Monaco Knight 40 PDQ
2011 Jeep Liberty
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