The energy from sun is one that can provide sufficient energy for a considerably long period of time. Even though this has been discovered for a pretty long time, people are yet to discover the true benefits of this energy. Solar energy means goodbye to fossil fuels and goodbye to pollution. This means that countries that have turned towards the sun for energy by developing their first solar energy units are on the path towards clean energy. A solar cell is something that can be used by any nation in order to provide clean and sustainable energy for its people. Solar cells make use of PV effect in order to tap energy from the sun. It is the method by which solar panels tap energy by emitting electrons. Solar panels have the ability to generate energy when struck by sunlight or electromagnetic radiation. The energy received from such panels can be used for functioning appliances like solar water heater.