The need of electricity is a primary attribute in these modern eras. However, not all Jakarta residents get their hands on the electricity in an easy and sustainable way, especially the residents of Sebira Island in Kepulauan Seribu. Sebira Island is far from Java, which is not practical neither to use submarine power cable to power the island nor diesel generator for the only primary attribute of generating electricity, especially its uneconomical traits. In this research we will concentrate on how to design the best Microgrid scenario that is operated in off-grid mode. The microgrid proposed contains PV system and diesel power generator. The proposed design is also analyzed using technical and economical way to know the feasibility of the design in project manner. Contributing by using the proposed scenario, the cash flow which can be saved is up to 3.4 billion Rupiah.