Performance Analysis of a Solar PV System for Industrial Rooftop Applications in the EEC of Thailand: A Case Study of PTTGC 4 Rayong
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This study presents a performance analysis of a large-scale industrial rooftop solar PV system, using the PTTGC 4 facility in Rayong as a case study in Thailand's Eastern Economic Corridor (EEC). A total rooftop area of 10,280 m2 was modeled in PVsyst (version 7.4.7) to evaluate the power generation and performance of a grid-connected PV system under local climatic conditions (Meteonorm 8.1 data for Rayong, 12.69°N, 101.15°E). The optimized system arrangement produced an installed capacity of 2.342 MWp using 3,808 monocrystalline modules with 19 inverters at a tilt angle of 30°. Simulation results show an annual energy output of 3.573 GWh, an annual specific yield of 1,526 kWh/kWp, and a performance ratio of 87.43%, indicating favorable irradiation conditions and an efficient system design. Thermal losses (6.09%) and inverter losses (1.68%) are the dominant losses in the system for PV deployment in the EEC. The results show that solar PV rooftop utilization in industrial estates within the EEC is a technically feasible and scalable pathway to reduce greenhouse gas emissions while increasing on-site renewable energy penetration. This case study offers a replicable framework for PV-based decarbonization evaluations in similar industrial settings across Southeast Asia.
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