كم من الوقت تدوم الألواح الشمسية؟ حوالي ٢٥ سنة إلى ٨٠٪ كفاءة About 25 years to 80% efficiency. 0 Share This Previous Post← Solar is following the same trajectory as smartphones Solar is following the same trajectory as smartphones Next PostSolar fits very well with nature → Solar fits very well with nature You May Also Like . Rich countries control poor countries through energy poverty View Post . There are 3 grades of solar products you can use View Post . Can I iron my clothes with solar? View Post