Power supply is generated by hydropower, wave power / wave energy, coal fired, nuclear, wind power and also solar from sunlight The safest means is by solar power followed by wind power as they are environment friendly. Solar power is the conversion of energy from sunlight into electricity either directly using photovoltatics, indirectly using concentrated solar power which uses lenses or mirrors with tracking systems to focus on a large area of sunlight into a small beam. Made from efficient solar cells and conforming to international standards, performance and reliability are not compromised. Advantages of using solar system are: Solar power is a renewable resource Non-polluting Energy and heat from the sun is free Solar cells require little maintenance No moving parts to be replaced or maintained Replacement after 20 years Very versatile used in cars, water heaters, buildings, satellite, aviation, street lighting, remote telecommunications systems, highway emergency phones
