The benefits of using non-sinusoidal sinewave inverters over true sinewave inverters include lower initial cost and more efficient power use for small, low-load household appliances, such as blenders, mixers, lamps, and incandescent lights.
However, yacht owners should be aware that non-sinusoidal inverters must be equipped with a GFCI (ground-fault circuit interrupter) for safety against electrical hazards. In addition, a few inverters produce harmonic distortion in the AC output waveforms, which can affect the operation of some GFCI devices. Harmonic distortion also affects the performance of household appliances on boats, such as televisions and other electronics.