Study on Techno-Economic of Peak Shaving with Photovoltaic System and Battery Energy Storage System
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Abstract
This research evaluates the technical efficiency and economic viability of a solar cell system combined with a battery (PV-BESS) to reduce the peak demand by 10% from the original base of 770 kilowatts. The study employs a simulation of the BESS system with a capacity of 77 kilowatts/154 kilowatt-hours, alongside a dynamic investment analysis, considering the expected decrease in battery costs over the years. From 2024 to 2030, simulation results indicate that the system can reduce peak electricity demand by 77 kilowatts as targeted. Economically, the project is not yet considered an investment opportunity during this period. B.E. 2567-2572 (NPV < 0, IRR < 8%) The strategic breakeven point will occur in the year B.E. Prof. In 2573, when battery prices are expected to drop to 2,880 baht per kilowatt-hour, resulting in an internal rate of return (IRR) increasing to 8.65%, which is higher than the acceptable discount rate. In summary, although the PV-BESS system has high technical efficiency, the investment value depends on the timing relative to technology costs. The research therefore recommends a "Watchful Waiting" strategy to allow operators to decide on investment when market conditions are favorable.
Keywords: Peak Shaving, Photovoltaic System, Battery Energy Storage System, Techno-economic Analysis, Investment Timing Peak Demand IRR NPV Strategic Break-even Point
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