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Energy problems take the first place among the most important problems and tasks which should be solved by a society in the XXI century. The existing resource base of energy on which all economic activities of mankind are based is exhaustible, and already in the foreseeable future. In this connection the issues of energy saving, development and implementation of alternative energy systems or renewable energy sources (RES) are becoming one of the most relevant. In the context of the COVID-19 pandemic, the urgent need for inexpensive and reliable energy supply is becoming more and more evident. The impact of the COVID-19 pandemic on the energy sector and the current conditions of the new energy transition model have forced a new perspective on energy security. Ensuring access to affordable, reliable, sustainable and modern energy for all is key to socio-economic progress. © 2022 Author(s).