The book titled "Renewable Energy an Economics of Distributed Generation" was written for the purpose to solve the problem of power crises in the world. The book consists of renewable energy, hybrid generation, distribution generation. In present scenario the conventional sources are insufficient to meet our increasing demand. Keeping this in mind we have tried to analyses the advantage of Distributed Generation. In this process of distributed generation we have utilized the developing renewable sources of energy. As the renewable sources like solar & wind power are uncertain. So we have tried to incorporate fuel cell to provide additional backup requirement.