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Open Access

Expression of Concern

Expression of Concern: Optimal sizing and power losses reduction of photovoltaic systems using PSO and LCL filters

  • The PLOS One Editors

The PLOS One Editors issue this Expression of Concern for this article [1,2] because of concerns identified about the peer review process. Readers are advised to interpret the article with caution.

In addition, Reference #21 in this article was retracted before publication.

References

  1. 1. F Elnaggar M, Duvalier Péné A, Boussaibo A, Tsegaing F, Foutche Tchouli A, Kitmo, et al. Optimal sizing and power losses reduction of photovoltaic systems using PSO and LCL filters. PLoS One. 2024;19(4):e0301516. pmid:38568998
  2. 2. Elnaggar MF, Duvalier Péné A, Boussaibo A, Tsegaing F, Foutche Tchouli A, Kitmo, et al. Correction: Optimal sizing and power losses reduction of photovoltaic systems using PSO and LCL filters. PLoS One. 2024;19(5):e0304568. pmid:38781229

Citation: The PLOS One Editors (2026) Expression of Concern: Optimal sizing and power losses reduction of photovoltaic systems using PSO and LCL filters. PLoS One 21(6): e0351344. https://doi.org/10.1371/journal.pone.0351344

Published: June 11, 2026

Copyright: © 2026 The PLOS One Editors. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.