Renewable energy generation has become the choice of many countries, including Indonesia. The type of New and Renewable Energy (EBT) generation in Indonesia is Solar Power Plants. Not only targeting people who are not reached by alternative distribution networks but also Solar Power Plants systems are a necessity for public and communal facilities in Indonesia. Gorontalo City is part of Gorontalo Province with an area that occupies part of the northern region of Sulawesi Island with diverse regional characteristics, ranging from coastal areas to mountainous areas, where some areas in this province have the potential for investments in the industrial and commercial sectors. commercial. In addition, the uneven distribution of energy infrastructure is an energy problem faced by Gorontalo City. The research and modeling method in this study employs the Photovoltaic System Software (PVsyst) application by surveying the research location for planning the installation of the On-Rooftop Solar Power Plant to find out the condition of the building, and the geographical location of the research. Based on the simulation results using PVsyst, the building of Universitas Ichsan Gorontalo uses a stand-alone system with a PV array of 1261 units with a total PNom of 328 kWp.  The battery technology, namely lithium-ion, 925 LCO units produce a voltage of 241 V with a current capacity of 9990 Ah. It generates energy per year of 513619 kWh/year with a ratio of 70.36% in which the active load is 13 hours/day.

Keywords : PVsyst; renewable; PV panel; energy; rooftop, Solar Power Plants.