A pure sine wave inverter converts direct current (DC) from a power source, such as a battery or a solar panel, into alternating current (AC) with a sinusoidal waveform. This is achieved through a complex process of electronic switching and signal processing. The inverter uses high – speed switching transistors to rapidly turn the DC power on and off, creating a series of pulses. These pulses are then shaped and filtered to produce a smooth, pure sine wave AC output.