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International Journal of Photoenergy
Volume 2012, Article ID 391213, 7 pages
http://dx.doi.org/10.1155/2012/391213
Research Article

A New Approach for Optimal Sizing of Standalone Photovoltaic Systems

1Department of Electrical, Electronic & System Engineering, Faculty of Engineering & Built Environment, National University of Malaysia, Selangor, 43600 Bangi, Malaysia
2Solar Energy Research Institute, National University of Malaysia, Selangor, 43600 Bangi, Malaysia
3Department of Electrical Engineering, Engineering Faculty, An-Najah National University, Nablus 97300, Palestine

Received 16 August 2011; Accepted 16 November 2011

Academic Editor: Peter Rupnowski

Copyright © 2012 Tamer Khatib et al. 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.

Abstract

This paper presents a new method for determining the optimal sizing of standalone photovoltaic (PV) system in terms of optimal sizing of PV array and battery storage. A standalone PV system energy flow is first analysed, and the MATLAB fitting tool is used to fit the resultant sizing curves in order to derive general formulas for optimal sizing of PV array and battery. In deriving the formulas for optimal sizing of PV array and battery, the data considered are based on five sites in Malaysia, which are Kuala Lumpur, Johor Bharu, Ipoh, Kuching, and Alor Setar. Based on the results of the designed example for a PV system installed in Kuala Lumpur, the proposed method gives satisfactory optimal sizing results.