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

Konstantinos Christopoulos (), Dimitrios Zafirakis, Kosmas A. Kavadias and John K. Kaldellis
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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

Energies, 2025, vol. 18, issue 7, 1-14

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.

Keywords: experimental measurements; inclination; orientation; shading; capacity factor; specific energy yield (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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