An sine wave inverter is an electrical inverter that produces utility-quality, sine wave power forms.

The waveform of the alternating current coming from a mains supply is a sine wave, and most electrical equipment is therefore designed to operate using such a source. Only a sine wave inverter can create this mains-like waveform from a DC input, and is highly recommended for equipment such as TV, radio, sensitive audio or video equipment, all inductive loads such as refrigerators, water pumps, power tools, etc.