Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2010.1212.1228KhatibTamer1220101013In this study a technical review of designing and installing the photovoltaic (PV) power system is proposed in order high light the optimum design and installing methods so as to optimize the photovoltaic system as much as can. The loads and the sun potential estimation methodologies have been proposed initially then the sizing methods of the PV system components; PV array, controller, batteries and inverter have mentioned. In the second part a recommended ways of interconnecting and installing the PV system have been introduced in order to reduce system faults and breaks consequently increase the system reliability. Finally an economic evaluation of the PV system using the present worth method is suggested in order to know how to evaluate the system feasibility and compare it with another alternative systems.]]>Barra, L., S. Catalanotti, F. Fontana and F. Lavorante,1984Borowy, B.S. and Z.M. Salameh,1996Bucciarelli, Jr. L.L.,1986Bucciarelli, LL.,1984Celik, A.N.,2002Chapman, R.N.,1987Chapman, R.N.,1987Egido, M. and E. Lorenzo,1992Gavanidou, E.S. and A.G. Bakirtzis,1992Groumpos, P.P. and G. Papageorgious,1987Hasti, D.E.,1994Hill, M. and S. McCarthy,1991Kaye, J.,1994Keller, L. and P. Afolter,1995Khatib, T.T.N., A. Mohamed, R.J. Khan and N. Amin,2009Khatib, T.T.N., A. Mahmoud, N. Amin and K. Sopian,2010Khatib, T.T.N., A. Mohamed, M. Mahmoud and N. Amin,2010Khatib, T.T.N., A. Mahmoud and N. Amin,2009Mahmoud, M.M. and I.H. Ibrik,2003Markvart, T., A. Fragaki and J.N. Ross,2006Roger, M. and J. Ventre,2000Protogeropoulos, C., B.J. Brinkworth and R.H. Marshall,1997Shrestha, G.B. and L. Goel,1998Soras, C. and V. Makios,1988Thomas, M.G. and G.J. Jones,1988Treble, F.C.,1993