This paper discusses the resource, technical, and economic potential of using solar photovoltaic (PV) systems in Belarus and Tatarstan. The considered countries are characterized by poor actinometric conditions and relatively low tariffs for traditional energy resources. . As of 2021 there is little use of solar power in Belarus but much potential as part of the expansion of renewable energy in Belarus, as the country has few fossil fuel resources and imports much of its energy. [1] At the end of 2019 there was just over 150MW produced by solar power. [1]: 29 In. . The Law on Renewable Energy Sources regulates relations among all entities involved in the use of RESs for electricity production and consumption, as well as production of renewables for use by renewable energy plants. The creation of new facilities, and modernisation and reconstruction of existing. . Belarus has established clear targets, aiming for renewables like solar to generate 10% of its total power by 2030. This goal is part of the broader INFORSE Vision2050 for Belarus, which maps out a gradual transition to renewable energy by mid-century. Despite these clear goals and supporting. . Institute of Power Engineering NAS of Belarus, Akademicheskaya 15/2, 220072 Minsk, Belarus Department “Industrial Heat Power and Heat Supply Systems”, Kazan State Power Engineering University, 51 Krasnoselskaya Str., 420066 Kazan, Russia Institute of Energy, Peter the Great St. Petersburg. . ound 1 000 kWh/m 2 of DNI. This means that concentrated solar power (CSP) generation is impractical,but production by mea ydroelectric power plants. ion and import in Belarus. . Solar power potential is significant,mainly in the south and southeast of the country. In terms of global horizontal irradiation (GHI) and direct normal irradiation (DNI),most of Belarus receives only 1 100 kilowatt hours per square metre(kWh/m 2) to 1 400 kWh/m 2 of GHI,and around 1 000 kWh/m 2 of. .