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International Journal of Photoenergy
Volume 2014, Article ID 475080, 5 pages
Research Article

Optimum Availability of Standalone Photovoltaic Power Systems for Remote Housing Electrification

Institute of Networked & Embedded Systems/Lakeside Labs, University of Klagenfurt, P.O. Box B10a.2, 9020 Klagenfurt, Austria

Received 5 January 2014; Revised 15 April 2014; Accepted 29 April 2014; Published 8 May 2014

Academic Editor: Hongxing Yang

Copyright © 2014 Tamer Khatib and Wilfried Elmenreich. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The availability of PV systems is discussed to determine the optimum availability at which standalone PV systems must be designed. Optimization methods and PV systems software, such as HOMER and PV.MY, were used for this purpose. Six PV systems with six availability levels were analyzed, in terms of wasted energy, cost of energy, battery usage, and power shortages, using real meteorological data. Results show that PV systems with 99% availability are recommended, because of their high reliability and favorably wasted energy.