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Data-Driven Energy Analysis for a Set of Rooftop Photovoltaic Systems Featuring Different Installation Characteristics: A Pairwise, Early-Life Performance Comparison

Author

Listed:
  • Konstantinos Christopoulos

    (Soft Energy Applications & Environmental Protection Lab, Mechanical Engineering Department, University of West Attica, 250 Thivon & P. Ralli Street, 12241 Athens, Greece)

  • Dimitrios Zafirakis

    (Soft Energy Applications & Environmental Protection Lab, Mechanical Engineering Department, University of West Attica, 250 Thivon & P. Ralli Street, 12241 Athens, Greece)

  • Kosmas A. Kavadias

    (Soft Energy Applications & Environmental Protection Lab, Mechanical Engineering Department, University of West Attica, 250 Thivon & P. Ralli Street, 12241 Athens, Greece)

  • John K. Kaldellis

    (Soft Energy Applications & Environmental Protection Lab, Mechanical Engineering Department, University of West Attica, 250 Thivon & P. Ralli Street, 12241 Athens, Greece)

Abstract

The specific research presents a detailed, data-driven energy analysis on the early-life operation of two rooftop photovoltaic (PV) systems. The two PV systems examined are operated under the Net Metering scheme and are found in close proximity, within the geographical boundaries of a small-scale remote island on the Southeastern part of the Aegean Sea, Greece. The systems feature similar PV technology and capacity, i.e., 3.5 kW p vs. 5 kW p , but differ in terms of installation characteristics; thus, they offer an interesting case for pairwise comparison. Supported by the exploitation of a wealthy set of data, a detailed energy analysis is conducted, with our results providing useful insights on the seasonal performance variation of the two systems and its determinants, reflecting on the different siting and installation characteristics of the former.

Suggested Citation

  • Konstantinos Christopoulos & Dimitrios Zafirakis & Kosmas A. Kavadias & John K. Kaldellis, 2025. "Data-Driven Energy Analysis for a Set of Rooftop Photovoltaic Systems Featuring Different Installation Characteristics: A Pairwise, Early-Life Performance Comparison," Energies, MDPI, vol. 18(7), pages 1-14, March.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:7:p:1677-:d:1621811
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    References listed on IDEAS

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    1. Kaldellis, John & Zafirakis, Dimitrios, 2012. "Experimental investigation of the optimum photovoltaic panels’ tilt angle during the summer period," Energy, Elsevier, vol. 38(1), pages 305-314.
    2. Genave, Anna & Blancard, Stéphane & Garabedian, Sabine, 2020. "An assessment of energy vulnerability in Small Island Developing States," Ecological Economics, Elsevier, vol. 171(C).
    3. Ioannidis, Alexis & Chalvatzis, Konstantinos J. & Li, Xin & Notton, Gilles & Stephanides, Phedeas, 2019. "The case for islands’ energy vulnerability: Electricity supply diversity in 44 global islands," Renewable Energy, Elsevier, vol. 143(C), pages 440-452.
    4. Tzanes, G. & Zafirakis, D. & Makropoulos, C. & Kaldellis, J.K. & Stamou, A.I., 2023. "Energy vulnerability and the exercise of a data-driven analysis protocol: A comparative assessment on power generation aspects for the non-interconnected islands of Greece," Energy Policy, Elsevier, vol. 177(C).
    5. Kaldellis, J.K. & Zafirakis, D., 2007. "Present situation and future prospects of electricity generation in Aegean Archipelago islands," Energy Policy, Elsevier, vol. 35(9), pages 4623-4639, September.
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