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In recent years, in the EU and, in particular, in Bulgaria, there has been a lack of efficiency in the construction of high-capacity photovoltaic power plants concentrated in areas with low population density. This has sparked a trend towards small PV systems close to consumers. The focus is on the generation and distribution of electricity through the construction of small rooftop PV power plants. The decentralization process for the construction of such stations is the most advanced. In connection with the stimulation of the construction of small photovoltaic power plants as decentralized sources of electricity and their proper technological construction, it is necessary to build an effective learning environment for the training of specialists in practice. The purpose of this article is to present some of the results obtained in conducting laboratory tests conducted jointly with students in the process of their studying.