Feed-in tariffs has evidently been demonstrated to be one of the most successful and one of the most successful renewable mechanisms for promoting large-scale energy markets that offer the stability necessary to attract local manufacturing, as practiced all renewable energy areas. To understand the FIT strategy, we have to first make the following remark: the major obstacle in front of green electricity is that it is so expensive when compares with fossil-based electricity. The generators can produce cheap electricity from fossil fuels but it is further expensive from renewable energies. They refrain from producing the expensive one because they are not sure whether the suppliers will buy electricity from them: the suppliers will prefer to buy the cheap one so that the consumer pays the minimum as possible as for electricity. The government obligates the suppliers to buy the green electricity at a price higher than the price of the regular electricity. Many investors can build new power plants because they know that they have a guaranteed price for operation. The FIT programs have been proven, by experiences from some European countries, to make larger and faster penetration of energy market at a lower cost than any
types of other promotion systems. The main effect of FIT is on the technology price reduction, which makes it suitable for building sustainable development [2].