R Rapid technological developments have changed people's lives easier and more practical. Practical necessities of life are increasing, especially in big cities like Jakarta. Development areas such as the superblock in Jakarta seems to address the needs of urban people to live more practical with a concept, that each individual can live, work, and have recreation in one area without traveling far away (one-stop living concept). Given the importance of the function of super-block area in Jakarta, it is also important to maintain a stable supply of electric power and sustainable. Provision of power reserve to ensure continuity of reliable electric power when the mains supply (from gas engine) experienced interference or outages. The method used is analysis comparison of price and reliability between unit power plant's combinatit. This final assignment is focused on designing the suitable capacity of ba up power plant and its configuration system that are practical and e k area.