In this final paper, various designs of submarine cables, single-core and three-core, were analyzed and compared from a technical and economic perspective. Previously proven data was used throughout the analysis. The second chapter provides general data on cables. The third chapter discusses the analysis and comparison of various technical parameters of 110 kV submarine cables. The technical characteristics, i.e. the advantages/disadvantages of single-core and three-core cables - transmission power and losses, resistance to possible cable damage caused by passenger or fishing boats, were compared. The prices of single-core and three-core cables, laying prices, maintenance costs, cable transport prices from the factory to the laying site, coastal protection prices and finally a recapitulation of all costs are analyzed in the fourth chapter of this paper. The analysis conducted shows that the best solution for the given example is to select a submarine cable with a cross-section of 3x630 mm2 for the highest quality and most reliable power supply.