Table 4: Comparison of studies in the literature in terms of UEC.

Ref. numberAuthorsYearLocationSystem life (years)Discount rate (%)Inflation rate (%)System power (kWp)UEC ($/kWh)

[19]Nordin and Rahman2015Malaysia256.852.81.400.34
[20]Chel and Tiwari2010India304n/a2.320.96 (0.8 €/kWh)
[21]Roy and Kabir2011Bangladesh2010n/a0.41.046
140.582
[22]Ghafoor and A. Munir2014Pakistan208420.15
[23]Kamalapur and Udaykumar2010India25n/an/a0.140.258
[24]Hassan et al.2016Iraq20933.10.51
[6]Al-Karaghouli and Kazmerski2009Iraq306n/a60.444
Used model in this article2017Turkey25181210.11~0.15 (all-year sce.)
0.24~0.37 (spring sce.)
0.06~0.10 (summer sce.)
0.33~0.46 (autumn sce.)
0.45~0.60 (winter sce.)