Dear Ahmad;

Solar cells have no problem, but problems with batteries and how long they store energy.

لا توجد مشكلة فى الخلايا الشمسية ، ولكن مع البطاريات والوقت الذي تخزن فيه الطاقة

Dear Usama Badawy yes you are right also i think it's necessary to clean it every week because we have a bad weather and most keep it cools in hot days.

That true Dear Mohamed Azab.

High cost

Dear Mr.Ahmed

That’s a verygood question

the best thing in solar panel is its efficiencies that affect by many factors the most important thing is keeping the PV temperature with 25 degree of Celsius to have the most efficient, but in Iraq the temperature degree is goes to above 30 most of time in year except winters

And also the dust condition is one important factor in the iraq weater has a dusty wind most of time. hope this answer helpful for you. For more information on solar panel efficiency please visit this link below https://www.doityourself.com/stry/6-ways-to-improve-solar-cell-efficiency

Dear Peshawa Hama

Thank you very much for your answer.

Dear Mr. Ahmed,

To perform maximum utilization from introduction of the PV Solar Energy in Iraqi Energy Mix. We must go forward for ON-Grid PV Solar system in Distribution Sector as Green Distributed Generation (GDG) and exclude the Off- Grid PV Solar system (Stand alone system) which related to the highly cost (2$/W), Storage and Batteries problems, .....etc but for Grid-Tied system there is no problem with the cost (0.5$/W), but the main challenges that facing this type of system is the grid Astibility (Outages, Power Quality), after that we can talk about the heat effect from arising the PV Module temperature in summer, Dust Effect, Shadow effect, ....etc