Йовков, АтанасЛецковска, СилвияСейменлийски, КаменДолчинков, РадостинСимионов, Радослав2025-04-292022978-619-253-017-4http://research.bfu.bg:4000/handle/123456789/2565This report presents an analysis of the results obtained from a study of the efficiency of photovoltaic systems for domestic hot water supply. The performance of a solar photovoltaic water heating system with direct coupling of a photovoltaic array to a DC resistive heating element is studied and compared with a solar photovoltaic system. The analysis was carried out under the same climatic conditions for both systems.bgPVPhotothermalDomestic hot water supplyEnergy efficiencyArticle