According to the IEA report on Renewables (2016), new solar photovoltaic (PV) capacity grew by 50%, reaching over 74 GW. For the first time, solar PV additions in global energy mix rose faster than any other resource, surpassing the net growth in coal. It has been more than 20 years since the first manufacturers announced and extended guarantee for 25 years for PV panels, which set the market standards that have not been disputed ever since. Most research focuses on the impact of renewable generation, but the operation and maintenance costs, and installation aspects are not generally discussed. Most investors believe that solar projects should be developed to maximize electricity production, and much less attention is paid to lifetime expectancy or the adverse effects of non-optimal tilt angles. The aim of the present paper is to provide a broad review on factors that affect productivity and lifetime expectancy of solar panels. Through an actual construction plan, the correlation among optimal tilt angel and various factors (effect of dust, wind pressure, cooling effect of the wind, warming up, construction cost, temperature, annual takings) were examined. Quantification of both positive and negative effects was also necessary. The authors compare the effects of these seven factors to provide a broader view on the importance of properly determining the tilt angle of solar photovoltaic panels. It is proved that in Europe the installation tilt angle should not exceed 30.