Hi Len,

I guess my comments date me. I had never heard of a modified sine (square) wave inverter. But then I've been out of the electronics field for 20 years and haven't worked with an inverter for at least 35 years. The RV I had in the 1970s had an inverter but the output was a more or less pure sine wave, heavily filtered to suppress noise. I've learned something. Thanks, Len.

Chuck