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This paper is concerned with the design of a hybrid household system, located in the city of Sofia with the possibility of grid connection. It is comprised of photovoltaic (PV) arrays, wind generator and battery energy storage devices. A multi-objective, non-derivative optimisation is considered in this residential application; the primary objective is the system cost minimisation. The commercial software, HOMER Pro, is utilised to identify the least-cost design among hundreds of options. This paper discusses suitability of renewable energy (RE) applied in one-family household according socio-economic situation in Bulgaria. Finally, a route map of RES implementation options is presented, and economic indicators such as Total net presents cost (NPC), Cost of Energy (COE) and RES fraction are assessed.

Route map for renewable energy sources implementation for household in Bulgaria