Huang B.J.Lee C.P.2019-06-262019-06-2620049601481https://www.scopus.com/inward/record.uri?eid=2-s2.0-0344236365&doi=10.1016%2fj.renene.2003.07.004&partnerID=40&md5=3a701f69fe12ceac4f67fd6373ae5f81https://scholars.lib.ntu.edu.tw/handle/123456789/411436A long-term reliability test of an integral-type solar-assisted heat pump water heater (ISAHP) was carried out. The prototype has been running continuously for more than 13,000 h with total running time >20,000 h during the past 5 yr. The measured energy consumption is 0.019 kWh/l of hot water at 57 oC that is much less than the backup electric energy consumption of the conventional solar water heater. © 2003 Elsevier Ltd. All rights reserved.Heat pump; Solar energy; Solar heat pump[SDGs]SDG7Energy utilization; Heat pump systems; Solar water heaters; Electric energy; Solar energy; alternative energy; heat pump; performance assessment; prototype; Reliability analysis; Solar powerjournal article10.1016/j.renene.2003.07.0042-s2.0-0344236365