When the sun shines onto a solar panel, energy from the sunlight is absorbed by the PV cells in the panel. This energy creates electrical charges that move in response to an internal electrical field in the cell, causing electricity to flow. Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation. The threshold frequency is the minimum. Photovoltaic technology, often abbreviated as PV, represents a revolutionary method of harnessing solar energy and converting it into electricity. Working Principle: The working of solar cells involves light photons creating electron-hole pairs at the p-n. The energy from the sun amounts to 4×1020 MW, of which Earth receives only less than 1 % of the energy.