This study aims to compare the effect of monocrystalline and polycrystalline PV modules on rooftop PV system performance, analyze the economic and environmental feasibility, and determine the optimal rooftop PV system design for energy supply at the Prabumulih Substation. The research was conducted using simulation methods with PVsyst software through five PV module proportion scenarios polycrystalline and monocrystalline, namely 100%:0%, 75%:25%, 50%:50%, 25%:75%, dan 0%:100%. The analyzed parameters include energy production, performance ratio, solar fraction, system losses, economic feasibility, and carbon emission reduction. The results show that increasing the proportion of monocrystalline modules improves energy production, solar fraction, electricity cost savings, and carbon emission reduction potential. However, higher proportions of monocrystalline modules also increase the initial investment cost. From an economic perspective, the 100% polycrystalline scenario provides the best investment feasibility with lower energy costs and a faster payback period compared to other scenarios. Based on technical, economic, and environmental aspects, the 100% polycrystalline scenario is considered the most optimal rooftop PV system design for implementation at the Prabumulih Substation.
Publication Date: 2026-06-15