Design and Evaluation of On-Grid Solar Rooftop Power Plant for Tower I of Ministry 3 Building in the New Indonesian Capital City

The increasing need for electrical energy has encouraged the Government of Indonesia to develop renewable energy, including rooftop solar power plants (SPP) as part of the strategy to achieve a $23 \%$ renewable energy mix by 2025. This study aims to design and evaluate an on-grid rooftop PV system for Tower 1 of Kemenko Building 3 in the New Capital City of Indonesia. This system is expected to support the green building concept and contribute to the Net Zero Emission target. Using PVsyst 7.2 software and weather data from Meteonorm 8.0 (Pvsyst database), simulations were conducted to determine the optimal configuration for solar energy production. The research location is at coordinates $0.9638^{\circ} \mathrm{S}$, and $116.6985^{\circ} \mathrm{E}$ with a roof area of $875 \mathrm{~m}^{2}$. After being simulated using PVsyst, the optimal configuration for annual energy production was obtained at 67.3 MWh with a solar panel tilt angle of 10° and an azimuth of 0° (facing north). The SPP system is designed using 550 WP monocrystalline modules arranged in 5 strings with 16 modules in each string, as well as an inverter from Canadian Solar with a capacity of 40 kW. Technical analysis also recorded a performance ratio (PR) of 0.835, indicating an operational efficiency of around $83.5 \%$ of ideal conditions. The proposed SPP configuration is capable of producing optimal energy and supporting the development of renewable energy in new urban areas. Implementing of this rooftop SPP is also an important step in helping the sustainable development plan in the New Capital City of Indonesia.