Ah, I always wondered why it would need 120V since that's about 1% of the sine. So it's 80V peak in the square (modified) wave? I've never looked at one but it makes sense and understandable why appliances without transformers don't work. Still is the power supply in any appliance designed for the modified square wave to source it on a dialy basis? I just see these things as the spare tire where use is assumed and not exactly taken into account when appliances are designed.