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Introduction of solar Electricity & Proposed Block Diagram 1.1 Introduction Energy is the most basic and essential of all resources .All the energy we use on Earth comes from fission or fusion of atomic nuclei or from energy store in the Earth. The problem with both fission and fusion is that, they have dangerous radioactivity and side effect. Therefore, most of the generation of energy in our modern industrialized society is strongly depending on very limited non-renewable resources such as petroleum. As the world’s energy demands rise and resources become scarce, the petroleum is getting more and more expensive. The search for alternative energy resources has become an important issue for our time. The people seek for new green and unlimited energy sources, e.g. wind energy, water energy, solar energy, etc. The most effective, reliable and harmless energy source is probably solar energy. Solar energy can be harvested by the use of photovoltaic (PV) array. But, there are still some drawbacks as follow: the install cost of solar panels is high, and the conversion efficiency is still lower. PV array has an optimum operating point to extract the maximum power called the maximum power point (MPP), which varies depending on cell temperature and insulation level 1.2 Power from the sun The sun has been worshipped as a life-giver to our planet since ancient times. The industrial ages gave us the understanding of sunlight as an energy source. This discovery has never been more important than now as we realize that the exploitation of fossil energy sources is affecting the planet's ambient temperature. The sun is humanity’s oldest energy source , scientists and engineers have long sought to harness the power of sunlight for a wide range of heating, lighting, and industrial tasks. Every child knows that focused sunlight is hot enough to set things afire; engineers and scientists know that every square meter of the earth receives 1 kilowatt of thermal energy when the sun is over heat. All solar thermal system capture the energy of the sun by absorbing light as heat. Solar thermal systems focus sunlight ,usually with mirrors, to heat a fluid to high temperatures and drive an engine. Photovoltaic solar power systems, in which light interacts with special materials directly to separate charges and generate electricity. Types of solar energy conversion: Photovoltaic solar power system Solar thermal power system 1.3 Solar heat into electricity Producing electricity from the energy in the sun’s rays is a straightforward process: direct solar radiation can be concentrated and collected by a range of concentrating solar power technologies to provide medium to high temperature heat this heat is then used to operate a conventional power cycle through a steam turbine solar heat collected during the day can also be stored in liquid or solid media .At night, it can be extracted from the storage medium and ,thus, continues turbine operation.