Solar energy is the most important renewable source of energy. It is produced from the sun’s radiation. Nowadays this renewable energy is used for a wide variety of purposes. The non-renewable energy sources are depleting day by day. So different solar technologies such as solar architecture, solar heating, solar thermal electricity and solar photovoltaic are used to solve the most of the urgent energy problems in the world. Solar technologies are divided into active solar and passive solar technologies. This classification is based on the method by which solar radiations are captured and converted as energy. In active solar techniques, solar thermal collectors and photovoltaic panels are used for the harnessing of energy. A passive solar technique involves the placing of building towards the sun, capture the radiation and produce the energy.
The main advantages of solar energy are cost effectiveness and sustainability and it is used for many purposes. It is mainly used for residential purposes. The important solar equipment used for household purposes are solar heater, solar lights, photovoltaic cells etc. Photovoltaic cells installed on the roofs of the houses will capture solar radiation. The energy from the radiation is turned into electricity and this is used for the working of household equipment. Batteries will capture energy in the day time, store it and supply electric power during night. The usage of solar heaters and solar lights has many advantages. They help to reduce energy expenditure to a great extent. Solar energy is also used for industrial and commercial purposes. They are used to power the TV, radio stations, lighthouse, aircrafts etc. They are widely used in industry, warehouses and offices for power generation. This energy source is very much reliable, affordable and often need less maintenance.
There are different advantages of solar energy. For producing energy from the sun, only initial investment is required. We don’t have to afford additional expenditure. Solar equipment reduces the electricity bills. Solar energy reduces the demand of fuel. This kind of energy is very much environmentally friendly. Most of the conventional forms of energy produce harmful pollutants during their combustion. But solar energy does not release toxin like mercury, carbon dioxide, and sulphur oxide or nitrogen oxide during their combustion. Thus it prevents the environment from getting polluted. So it does not cause acid rain, global warming and smog. It helps to decrease the emission of harmful greenhouse gases. Solar power will continuously supply electricity to your homes and offices during power outage.
A solar power system does not require connection to a power grid and so such systems can be installed even in remote locations. This is the more cost effective and practical approach of providing power to the remote areas. Less maintenance is required for the solar energy systems. There is no recurring cost for this system. In spite of all these advantages there are some demerits for solar energy. The initial cost this system is very high as compared with other conventional energy producing systems. For the installation of solar panels large area is needed. Also the production of solar power depends on the presence of pollution and clouds in the air.