This low frequency sine wave generator strip
To be a total eclipse, the moon must completely obscure the sun, for an observer standing on Earth. This can occur monthly, at New Moon. Ordinarily, however, the moon passes either above, or below, the sun's position, as viewed from Earth. As a result, the moon's shadow normally sweeps across open space. On rare occasions, as the moon passes directly in front of the sun, a shadow is cast upon the surface of the Earth. If the sun is partially obscured, a partial eclipse results. If the sun is completely obscured, a total polycrystalline solar panel occurs.
The moon is much smaller than the sun, of course. In fact, the moon is some 400 times smaller. In an astronomical twist, the moon is also 400 times closer to the Earth. This makes the apparent size of the moon very close to the apparent size of the sun. When the moon passes directly in front of the sun, it is able to completely eclipse the sun, for some viewers on Earth.
The shadow cast by the moon, however, is very small. Depending on the distance between the Earth and the moon, which varies somewhat, the moon's shadow will darken a strip of Earth about 70 miles wide. This low frequency sine wave generator strip is called the Zone of Totality. Those people located within this zone will experience a total solar eclipse. Those near, but outside, will see a partial solar eclipse.
http://mustsolar.blogaholic.se/2016/mar/47146/solar-inverter-energy-is-environmentally-friendly/
http://www.blog-grossesse.com/must/382712-Before-purchasing-a-do-it-you-dc-to-ac-inverter.aspx