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The universal energy predicament and the exhaustion of fossil fuel reserves necessitate the requirement for green and dependable source of energy. Renewable energies are produced from the natural processes that are replenished such as sunlight, wind, rain, tides, and geothermal heat. Furthermore, transmission of electricity which is tantamount to high cost and energy losses resulted to the integration technology of distributed generator (DG) during the past decade to supplements centralized generation. DGs are sustainable solution to provide electricity to customers at reliable and affordable price. This paper is an overview of renewable energy sources as used in distributed generation by presenting an updated data of the status of renewable energy resources. It also discusses impact of DG in distribution system, benefits of DG and its classification. Renewable DG technologies and factor hindering establishment of Distributed Generation were also highlighted.