Statistical analysis and investigation of the performance degradation of a grid- connected rooftop solar PV system under non- standard operation style and unstable grid conditions of Baghdad- Iraq

Hassan Naji Salman Al- Joboory, Abdulrahman K. Abbas, Abbas Najim Salman and Muayad Hasan Radhi Alzubaidi

Renewable Energy, 2025, vol. 249, issue C

Abstract: Non-standard operation in governmental buildings (electricity mains are shut down outside work times) and random instabilities of electricity grid are serious challenges facing the technical and economic feasibility of rooftop grid– connected solar PV systems. This work investigates the performance degradation of a 24 kWp solar PV plant installed at a governmental building in Baghdad-Iraq for operation period from 2018 to 2023. The actual measured production data are compared to the predicted performance (from PVSYT 7.4.0) and analyzed statistically using IBM SPSS 27, EasyFit 5.6 Professional and time series tools to evaluate the system reliability under abnormal operation conditions. Such an investigation has not been cited in the literature.

Keywords: Rooftop solar PV; Grid- connected; Degradation; Non- standard operation; Unstable grid (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:249:y:2025:i:c:s0960148125008870

DOI: 10.1016/j.renene.2025.123225

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