Morales-Aragones, Jose IgnacioWilliams, Matthew St. MichaelKupolati, HalleluyahAlonso-Gomez, VíctorGallardo-Saavedra, SaraRedondo-Plaza, AlbertoMunoz-Garcia, Miguel AngelSanchez-Pacheco, Francisco JoseHernandez-Callejo, Luis2023-02-152023-02-152022-11-26Morales-Aragones, J.I.; Williams, M.S.M.; Kupolati, H.; Alonso-Gómez, V.; Gallardo-Saavedra, S.; Redondo-Plaza, A.; Muñoz-García, M.Á.; Sánchez-Pacheco, F.J.; Hernández-Callejo, L. A Power-Line Communication System Governed by Loop Resonance for Photovoltaic Plant Monitoring. Sensors 2022, 22, 9207. https://DOI.org/10.3390/s22239207.1424-8220 (online)10.3390/s22239207https://repository.up.ac.za/handle/2263/89532Within this paper, a PLC system that takes advantage of the loop resonance of an entire DC-PV string configured as a circular signal path is developed and implemented. Low cost and extremely simple transceivers intended to be installed within each PV module of a string have been designed and successfully tested. In addition, an anti-saturation coil has been conceived to avoid saturation of the core when the entire DC current of the string flows through it. Bi-directional half-duplex communication was successfully executed with up to a 1 MHz carrier frequency (150 kbps bitrate), using a simple ASK modulation scheme. The transmission and reception performance are presented, along with the overall system cost in comparison to the previous literature.en© 2022 by the authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.Low costMonitoringPower-line communicationResonanceArticle