3G has become a popular topic and is developing rapidly due to energy shortage. Distributed generation (DG), also called on-site generation, dispersed generation, embedded generation, decentralized generation, decentralized energy, or distributed energy, generates electricity from many small energy sources. A DG is the use of small-scale power generation technologies located close to the load being served DG stakeholders includes energy companies, equipment suppliers, regulators, energy users, and financial and supporting companies. DG may add redundancy that increases grid security even while powering emergency lighting or other critical systems Distributed energy resource systems are small-scale power generation technologies used to provide an alternative to or an enhancement of the traditional electric power system. Renewable energy is energy that comes from natural resources such as sunlight, wind, rain, tides, and geothermal heat, which are renewable. While many renewable energy projects are large-scale, renewable technologies are also suited to rural and remote areas, where energy is often crucial in human development.