Conditioning Of Photovoltaic Power Losses Through Deviation And Residual Analysis
Abstract
The performance evaluation of the photovoltaic system is conducted by combining a theoretical power-estimation approach with environmental observations. The dataset includes irradiance, temperature, air density, and cloud cover, enabling examination of the system's operating conditions in relation to atmospheric variability. A reference power signal is obtained from a formulation dependent on temperature and irradiance intensity, and this signal is used as a reference for comparison with the measured output. From this reference point, residuals describing instantaneous deviations from expected behavior can be derived. These residuals are generally concentrated around zero. However, they are interrupted by distinct power drops at more infrequent intervals. These intervals are not randomly distributed over time. They coincide during periods when intense solar radiation coincides with high temperatures. This indicates that thermal effects and short-term radiation fluctuations jointly shape the observed response. To examine these effects, loss maps were created for light intensity-temperature and cloud cover-light intensity pairs. Ultimately, the most significant losses occurred when module temperatures increased alongside high radiation and under partially cloudy conditions. The study combined theoretical comparison, residue-based evaluation, and loss mapping. As a result, a new framework was presented to interpret PV performance deviations and understand how atmospheric variability leads to reductions in energy efficiency. The results indicate a cumulative loss of 54,663 Wh, corresponding to 26.62% of the total theoretical energy production. Residual magnitudes increased significantly under high irradiance conditions, often exceeding 200 W, highlighting the dominant role of combined thermal and atmospheric effects in shaping performance deviations.
Keywords
- Photovoltaic systems
- Theoretical power model
- Performance deviation
- Energy loss analysis
- Atmospheric effects
Supporting Institution
Ethical Statement
References
- Nguyen, V.G., Sirohi, R., Tran, M.H., Truong, T.H., Duong, M.T., Pham, M.T., and Cao, D.N. “Renewable energy role in low-carbon economy and net-zero goal: Perspectives and prospects”, Energy & Environment. 36, 2248–2287 (2025). DOI: https://doi.org/10.1177/0958305X241253772
- Yüksek, G., Mete, A.N., “A P&O Based Variable Step Size MPPT Algorithm for Photovoltaic Applications”, Gazi University Journal of Science. 36, 608–622 (2023). DOI: https://doi.org/10.35378/gujs.1050325
- Yuksek, G., and Mete, A.N., “A hybrid variable step size MPPT method based on P&O and INC methods”, In: 2017 10th International Conference on Electrical and Electronics Engineering (ELECO 2017), (2018).
- Araújo, N.M.F.T.S., Medeiros, S.E.L., and Abrahão, R., "Variability and Sensitivity of Models Used to Estimate Photovoltaic Production", Energies (Basel), 17:4177, (2024). DOI: https://doi.org/10.3390/en17164177
- Alshawaf, M., Poudineh, R., and Alhajeri, N.S., "Solar PV in Kuwait: The effect of ambient temperature and sandstorms on output variability and uncertainty", Renewable and Sustainable Energy Reviews, 134:110346, (2020). DOI: https://doi.org/10.1016/j.rser.2020.110346
- Smith, R.M., Matam, M., and Seigneur, H., "Mismatch losses in a PV system due to shortened strings", Energy Conversion and Management, 250:114891, (2021). DOI: https://doi.org/10.1016/j.enconman.2021.114891
- Tao, Y., Bai, J., Pachauri, R.K., Wang, Y., Li, J., and Attaher, H.K., "Parameterizing mismatch loss in bifacial photovoltaic modules with global deployment: A comprehensive study", Applied Energy, 303:117636, (2021). DOI: https://doi.org/10.1016/j.apenergy.2021.117636
- Brahma, B., and Wadhvani, R., "A residual ensemble learning approach for solar irradiance forecasting", Multimedia Tools and Applications, 82:33087–33109, (2023). DOI: https://doi.org/10.1007/s11042-023-14616-6
Details
Primary Language
English
Subjects
Electrical Energy Generation (Incl. Renewables, Excl. Photovoltaics), Renewable Energy Resources
Journal Section
Research Article
Authors
Gökhan Yüksek
*
0000-0002-6832-8622
Türkiye
Early Pub Date
July 24, 2026
Publication Date
-
Submission Date
December 17, 2025
Acceptance Date
May 12, 2026
Published in Issue
Year 2026 Number: Advanced Online Publication