120W solar module: 1.Efficiency is above 17% 2.Prompt delivery 3.Easy installation 4.certification:TUV.CE.ISO 120W solar module:Long lifetime:more than 25 years,less power decrease.Good performance of preventing from atrocious weather such as wind and hails,Resisting moisture and etching effectively,not effect by geology.Warranty:2 year product warranty,and Pmax is no less than 90% in 10 years ...