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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

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

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.

Suggested Citation

  • Al- Joboory, Hassan Naji Salman & Abbas, Abdulrahman K. & Salman, Abbas Najim & Radhi Alzubaidi, Muayad Hasan, 2025. "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," Renewable Energy, Elsevier, vol. 249(C).
    • Handle: RePEc:eee:renene:v:249:y:2025:i:c:s0960148125008870
    DOI: 10.1016/j.renene.2025.123225
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    References listed on IDEAS

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    1. Bendaas, Ismail & Bouchouicha, Kada & Bouchakour, Salim & Boulahchiche, Saliha & Razagui, Abdelhak & Semaoui, Smail & Hadj Arab, Amar, 2026. "Performance degradation and economic resilience of grid-connected PV systems in desert climates: A 5-year case study from the Algerian Sahara," Renewable Energy, Elsevier, vol. 258(C).

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