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Under the new paradigm of prosumers and energy communities, grids are increasingly influenced by microgeneration systems connected in both low and medium voltage. In addition, these facilities provide little or no information to distribution and\/or transmission system operators, increasing power system management problems. Actually, information is a great asset to manage this new situation. The arrival of affordable and open Internet of Things (IoT) technologies is a remarkable opportunity to overcome these inconveniences allowing for the exchange of information about these plants. In this paper, we propose a monitoring solution applicable to photovoltaic self-consumption or any other microgeneration installation, covering the installations of the so-called \u2019prosumers\u2019 and aiming to provide a tool for local self-consumption monitoring. A detailed description of the proposed system at the hardware level is provided, and extended information on the communication characteristics and data packets is also included. Results of different field test campaigns carried out in real PV self-consumption installations connected to the grid are described and analyzed. It can be affirmed that the proposed solution provides outstanding results in reliability and accuracy, being a popular solution for those who cannot afford professional monitoring platforms.<\/jats:p>","DOI":"10.3390\/s22134966","type":"journal-article","created":{"date-parts":[[2022,7,1]],"date-time":"2022-07-01T01:40:36Z","timestamp":1656639636000},"page":"4966","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Democratization of PV Micro-Generation System Monitoring Based on Narrowband-IoT"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4431-1161","authenticated-orcid":false,"given":"Jos\u00e9 Miguel","family":"Paredes-Parra","sequence":"first","affiliation":[{"name":"Technological Center of Energy and Environment (CETENMA), 30353 Cartagena, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Raquel","family":"Jim\u00e9nez-Segura","sequence":"additional","affiliation":[{"name":"Departament of Automatics, Electrical Engineering and Electronic Technology, Universidad Polit\u00e9cnica de Cartagena, 30202 Cartagena, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9836-2971","authenticated-orcid":false,"given":"David","family":"Campos-Pe\u00f1alver","sequence":"additional","affiliation":[{"name":"Technological Center of Energy and Environment (CETENMA), 30353 Cartagena, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1943-686X","authenticated-orcid":false,"given":"Antonio","family":"Mateo-Aroca","sequence":"additional","affiliation":[{"name":"Departament of Automatics, Electrical Engineering and Electronic Technology, Universidad Polit\u00e9cnica de Cartagena, 30202 Cartagena, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alfonso P.","family":"Ramallo-Gonz\u00e1lez","sequence":"additional","affiliation":[{"name":"Department of Information and Communications Engineering, Computer Science Faculty, University of Murcia, 30100 Murcia, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6824-8684","authenticated-orcid":false,"given":"Angel","family":"Molina-Garc\u00eda","sequence":"additional","affiliation":[{"name":"Departament of Automatics, Electrical Engineering and Electronic Technology, Universidad Polit\u00e9cnica de Cartagena, 30202 Cartagena, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,6,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"483","DOI":"10.1016\/j.rser.2018.05.068","article-title":"How Decarbonization, Digitalization and Decentralization are changing key power infrastructures","volume":"93","author":"Favuzza","year":"2018","journal-title":"Renew. 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