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Effect of tilt angle selection on the performance of grid-connected photovoltaics: Turkey case study



  1. Fırat University, Faculty of Technology, Department of Energy Systems Engineering, 23119, Elaziğ, Turkey


The purpose of this article is to constitute awareness about solar PV panels and investigate the effect of tilt angles on the performance at different latitudes of Turkey where the active solar systems are not widely used. The monthly average global and diffuse solar radiations of the locations were calculated numerically. A two-step screening was carried out for detecting the annual optimum tilt angles. Firstly a search between 0° and 75° with 5° steps, then a deeper analysis between 28° and 40° with 1° steps was employed. Then the monthly and seasonal optimum tilt angles were determined. Monthly and annual energy yield of the PV installations were obtained by using PVSyst 5.0 software. The monthly, seasonally and the yearly optimum tilt angles were detected for each locations. As a result it’s found out that, the yearly optimum tilt angles for Antakya, Elazig and Sinop are 32.1, 34.6 and 37.9 respectively. It is also found that mounting the panels at the monthly average tilt angles increase the energy output of PV systems with the ratios of % 5.2 for Antakya, % 6 for Elazig and % 6.3 for Sinop..


Grid-connected photovoltaics, Solar radiation, Optimum tilt angle, PVSyst, Electricity production.


S. EKİCİ, Effect of tilt angle selection on the performance of grid-connected photovoltaics: Turkey case study, Optoelectronics and Advanced Materials - Rapid Communications, 10, 5-6, May-June 2016, pp.397-404 (2016).

Submitted at: Nov. 3, 2015

Accepted at: June 9, 2016