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 . Everything we do… View Post . Lebanon has some of the best solar irradiance in the world View Post . Solar should not be for the elite View Post