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 . Many people ask why solar is so expensive? View Post . Solar is the only way forward for Lebanon View Post . Solar works best at high elevations View Post