The article discusses the problems of energy supply systems and the applications of renewable sources in the Far North. The specifics of energy supply in the northern regions (the lack of a centralized power supply system, the presence of a large number of isolated autonomous power supply systems) is studied. The special conditions of the Far North regions, which are taken into account in the implementation of projects, are analyzed and the main ones are discussed. Disadvantages of RES-based plants are identified. Programs aimed to increase the efficiency of electricity consumption are proposed. Measures such as the use of frequency-controlled drives and energy efficient engines, the replacement of industrial equipment with more energy efficient models, the use of modern thermal insulation materials in the construction of buildings, should be taken. Examples of buildings in Far North settlements and wind turbines and SESs are provided.