| Title |
Economic Feasibility Analysis of a 40kW Self-Consumption PV System for a Vocational Training Institute Using PVsyst Simulation |
| DOI |
https://doi.org/10.5207/JIEIE.2026.40.2.138 |
| Keywords |
Economic feasibility; Industrial electricity tariff; IRR; LCOE; NPV; PVsyst; PV system; Self-consumption |
| Abstract |
This study evaluates the performance and economic feasibility of a self-consumption photovoltaic (PV) system installed at a vocational training institution under an industrial electricity tariff. The PV system was designed with a capacity of approximately 40kWp based on the available rooftop area and the facility’s load characteristics. Annual energy production was estimated using PVsyst simulation, and the results were compared with actual electricity consumption data to assess the potential for self-consumption. Economic feasibility was analyzed for both self-consumption and power purchase agreement (PPA) models using net present value (NPV), internal rate of return (IRR), payback period, and levelized cost of electricity (LCOE). In addition, sensitivity analysis was conducted considering variations in electricity price, discount rate, and self-consumption ratio. The analysis period was set to 20 and 25 years to evaluate long-term economic performance. The results show that the self-consumption PV system can significantly reduce electricity costs and provide stable economic benefits due to its independence from electricity sales conditions. Although the PPA model may yield higher profitability under ideal conditions without curtailment, its economic performance is highly sensitive to grid constraints and electricity pricing. Therefore, for facilities with high daytime electricity demand, such as vocational training institutions, the self-consumption PV system is considered a practical and reliable option for reducing energy costs and enhancing energy independence. |