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This article deals with sizing of hybrid renewable sources applications that are suitable in remote areas where grid connection is unavailable or connection to grid is expensive. Depending on the size of installed capacity of each photovoltaic, wind power and small water power plant, such a system can be used to power small systems with hundreds watts consumption and also can be used to supply entire villages where the connected load has a power in the order of up to megawatts. All depends on the installed performance of different sources, types and sizes of the storage device and the equipment, to be an island power system. Such hybrid renewable sources systems are strongly dependent on the weather conditions of the site of their construction. The present paper is about a small grid-off system that powers a small single house. This house is modelled as family house with a two-membered family. The system consists of a photovoltaic cell field, a wind turbine, a small hydroelectric power plant, and a battery bank as a cumulating source. This system is designed to power a whole daily consumption load without electricity outages.

Sizing of Small Grid-off Renewable Sources Hybrid in Conditions of North-Eastern Slovakia