The Sun is the greatest source of unlimited energy known to man. In the beginnings of human civilization, the Sun was considered a deity because of the many benefits it gave to Homo sapiens. With the development of civilization, man began to discover the extent of the energy that the Sun emits into space and onto planet Earth. Considering man's irreversible impact on planet Earth, in recent decades more and more efforts have been made to reduce it, and humanity is trying with all its might to turn to renewable energy sources as much as possible. The European Union has high hopes for the same idea with the goal of becoming an energy independent continent by 2050. In order to achieve this goal, it is imperative for all members of the union to start developing projects aimed at reducing the use of fossil fuels for obtaining energy. In order to achieve this goal, it is necessary to adjust the legal regulations and create various studies to establish how this can be achieved. The sea makes up 71% of the Earth's surface and is still mostly unused. The latest technological solutions enable placement of solar panels on the sea surface, and various pilot projects successfully generate "free" electricity around the world. The Republic of Croatia is a country with enormous solar potential, but there is still no initiative to install floating photovoltaic power plants on the sea surface of the Republic of Croatia. This paper will describe the specific technological solutions required for placing solar panels on the sea surface. The existing legislation will also be studied and the advantages and disadvantages of existing technologies will be presented. Furthermore, the categories of factors that are considered to have to be met by potential locations will be set, and in conclusion, the calculation for two power plants located in the Primorsko-goranska county aquatorium at ultimately adequate locations will be presented.