I know a little about inverters,...basically most pure sine types are somewhat more efficient & will run induction loads better than a stepped (modified) sine. So anything that had a transformer in it, or a motor (referigeration compressor) will be happier with pure sine. However,...a high end modified sine inverter will run induction loads without any problems but the DC to AC conversion efficiency will not be as good. So, depending on your power needs & house battery capacity,...a modified sine will probably do just fine.
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